This is a great idea to still use the tool when you are out in the field and have no more good batteries left, but you still only get 2/3 of the power to finish the job. 18v tools run poorly on 12vdc. I use a generator in the field, and want to build an 18v dc power supply transformer that can plug into 110vac with a cord, so you can then use them as corded tools after your batts are all used up. I know why not use the gen. to charge batteries. warm batteries wont charge & it takes too long.
@joemiked Thanks! I thought so too. I still have not been contacted by Dewalt about this and have no idea if anyone else has actually made one of my "battery cheaters" as yet. I am amazed at how many hits this video has had since I posted it! People either love it or hate it but the facts are, I am still using this to run my Dewalt cordless tools and no problems to date. I guess that speaks for itself,,,,,,
Wow some serious issues people have with this, it's just as well you told everyone that they MUST use this mod on ALL their battery operated equipment (add heavy sarcasm). I guess some people don't want options, oh well they will be fine up until someone moves their dinner plate and they starve.
@tmastersat Absolutely correct! The drill draws current to supply torque. Under load, the motor will attempt to supply torque to the load by drawing the required current. If the line supply voltage is depressed, the current draw must increase. Under light loads, this 'cheat' may be fine. Under serious loads, this 'cheat' may damage your expensive equipment or worse. Viewers should be beware of YouTube engineering. A healthy sense of skepticism should be applied universally, even to this comment.
@Lokivoid The same reason a car radio rated at 4 amps doesn't draw more amps if connected to a car battery with, for example: Die Hard Gold Group Size 59, 590 CCA (cold cranking amps).
Do you think every electrical device in a car is going to draw the maximum available amps?
A device draws amps it is designed to at a given voltage. A drill that draws 3 amps at 18 volts (54 watts)
(I (amps) x E (volts) = P (watts)) will draw 4.5 amps at 12 volts (I (amps) = P(watts) divide by E (volts)).
I have a 18 volt grease gun and the charger got melted . Thay stoped making it and a new one is $200.00 . The guy that greases my equipment loves this in stead of his arm cramping. Thanks for the idea we have no power in the field.
@curbman256 Definitely appreciate the positive comment after so many negative comments have been posted about this. Now that all of my Dewalt batteries no longer hold a charge I am using my "battery cheater" to power them instead of purchasing new batteries for $86.00 plus tax. Regardless of what people say about taking a cordless tool and going to a cord again it still eliminates the old 115 volt power tools that we were once limited to when I was growing up.
you can damage an 18 or 24v tool by using a 12v supply. When voltage drops, current consumtion increases and can easily go beyond the maximum range of the tools component's current rating. This causes the tool to have a much better chance of overheating and malfunctioning. In addition, it will also void your warrenty.
@mastergx1 WRONG, when voltage drops current drops.
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them.
SOOO the only thing that can cause the current to go up is an increase in voltage, or a decrease in resistance, which would require this guy to rewind his little drill motor with either less turns of wire, or a heavier wire,
I wondered if there was some way of taking an 18V battery or 24V or whatever volt and placing them into a sort of Mini Inverter (sorta looks like the battery charger that comes with the batter) this way you can use the power of that battery to run small applicances, laptop computers, mini tv's or even lights. Has someone already invented one of these things. I would buy one and have a couple of batteries set aside for when power might go out. This would be a great backup.
This doesn't seem like a good idea. I'm not sure what type of motor is used here, but using 2/3rd the specified voltage cannot be good for it; this "cheat" will likely result in too much current draw and potentially overheat or permanently damage the drill motor. The below discussion about Ohm's law is misguided at best. While motors do have equivalent circuit models, reducing the discussion to V=IR is an oversimplification. Don't trust YouTube's engineers over Dewalt's.
@Fentanyl3 Ohm's law does work...that is the problem. The motor must deliver fixed power to the load. If the voltage drops, the current must increase, P = V*I. Higher current draw means more heat in the motor wiring. Enter Ohm's Law: P_loss = I^2 * R, where R is the resistance of the copper wiring. This power is lost as heat which results in increasing copper resistance, resulting in even more heating and eventually a destroyed motor. Google: "electric motors and voltage"
@bradjones06 You dont understand ohms law. That could only hapen if the current in the bat stayed the same and only the voltage dropped. Since the current will drop with voltage as the bat goes down you will would not have a problem. You see the total wattage of the battery goes down as it dies both v and I goes down making it impossible for your statement to be true.
@tmastersat You cannot compare a discharged 18V Dewalt battery to a 12V car battery. You are correct in that by the time your Dewalt's battery is that low (assuming it can even reach 12V) it can not supply any consequential current. However, a car battery can supply hundreds of amperes. Under any serious load, your 18V drill can draw excessive current from a 12V car battery which can easily supply a damaging amperage to your tools. My intent is not personal attack but to inform viewers. Beware!
ha ha ha it is funny how people react to this thing, ok, maybe you dont see the point of doing something like this but let me tell you that what I like about it is the principle , I work as a handyman and sometimes you just need to make a cut using a cordless circular saw but your battery will be ready in 1 hr, so what you gonna do ? I'm not saying this is perfect just that It may be a good idea, instead of carrying a cordless drill and a cord drill you can use one adaptor and you set, see ????
@jojuma91 Thank you! Definitely does not appeal to everyone as you can see. What I like about using the NATO plug to power my tools is continuous power that does not taper off due to battery fade.
ya some igiots have to figure a need to do something stupid like this. really you are out mending fences with a drill? and since you modified a battery perhaps you would be smart enough to buy a car charger and an extra battery, then when your battery dies while you are mending fences with it you could swap batteries. nope some dumb igiot will pull their truck up close to the fence and pull out their specially modified battery and hook it up to their truck battery.
Old 12 volt tools are cheap if not free. I use the same set-up when I have to fix fences or gates on my ranch. Waiting in the 95 degree summer sun for a battery to charge is not an option. There are those that get the job done, and those who wait for a little green light to say it's ok to work again. Livestock don't wait for recharged batteries.... A COUNTRY BOY CAN SURVIVE!!!
I would rather buy a new 220 amp hour deep cycle battery than a new drill battery any day. Try using that drill battery for a water pump, 650 CFM fan, refrigerator or any other survival gear you need after a major storm.
Keep up the good work! Though it may feel like it, your not the only man on the island.....
ok, i see the use if you don't have another battery, if your burning through so many, then get a corded one and a power inverter. reading the 'engineers argue is funny,
Arguing with a engineer, is like mud wrestling with a pig, you both get dirty, but the pig enjoys it.
@Bowfinger6383 I like your response! A lot of engineers and electricians are highly critical of the way I run my tools but voltage is voltage and I have not had a bit of trouble with any of my Dewalt cordless tools and don;t anticipate any either. They say "necessity is the mother of invention" and I felt it necessary to use this procedure to let me use my tools when my batteries failed me.
USELESS. if you want to change a cordless into a cord drill, then why not use a normal 120VAC drill? and if you so want to use a car batery use an ondulator and Tadaa! done. no need to fuck-up a 120$ cord less drill for that.
Im not too sure if you make any sense, just think about it, if a cat poos twice and your drill is hooked up like that, your sure gonna wind up on a roof without a paddle!!!DUH!!
congratulations. You have just turned your cordless drill into a mobile? drill. Now all you have to do is get the truck through the door of your house to use it....
@goodson305 All you would need is a transformer that puts out 18 volts DC and a modified battery like the one I made and you are in business. You can even use things like a car battery charger to power your tools. It works - trust me because I have used these things but did not make videos but may do so because of your inquiry.
@dano1p At face value it does look I am going backwards but when all of your batteries go bad it's nice to know another way to make your tools function without spending all that money for new ones which cost around $90.00 each. I promise you that, if enough people fabricated this system for their Dewalt tools the cost of replacement batteries would drop considerably. I am working on a battery pack that will use rechargeable 1.5 volt AA cells that you can buy and replace if they go bad.
For years now I pickup 12v used dewalts for there triggers and motors to put into my 18v drill when I burn through them, all the regulatory voltage and crap is in the battery case, the drill is just motor and a basic trigger. So stop y'alls over educated argument.
Wen someone tells me there an engineer I say "Oh they let you drive the train?"
I can agree with Rowdy , Its simple ohms law. I = P / E . as E increases I decrease. and as E decreases , I will rise.Also, voltage drop is calculated after 75 feet. torque, rpms of motors ,brushes , and windings will have minimal effects on current . Power output will be greatly changed .I wait to be corrected.
Very creative of you, but, if I'm going to have my Dewalt drill in the middle of nowhere with my car, I'll also have my 12v to 120volt inverter with me so I can recharge the battery using the regular Dewalt charger. Or better yet, my 15 minute Dewalt charger.
yes and i could also be in the middle of nowhere and then i should have my 10 person rubber boat in the trunk in case it gets flooded. and i could be in the middle of nowhere at my nowhere house and have to drill something on the 12th floor and then my 500 yard extension cord comes in handy! you are a stupid asshole. your idea is not worth used toilet paper. asshole.
Free energy has been here for a while ,But the Big corporations spend millions to ensure that information does not spread to the masses,Get a motor that works with the power of magnets only at LT-MAGNET-MOTORdotCOM ,Join the energy revolution!
I've done this myself some time ago.On trips to the junkyard(where I can bring my car in)it's very handy.I have an el-cheapo kit with a reciprocating saw, screw gun, and circular saw.I can use the hollowed out battery as a 12-V adapter for all three.
@janz1234567898 No, mine were 14 and 16 volt.The worst that happens is that they don't have quite as much power, but it won't hurt a thing.Just make sure that it is at least a 12 volt drill.
@CovKid80 You don't need an inverter, it's already DC current coming from the car, and the tool uses DC current.You just need to hook it up.The cigarette lighter wouldn't handle the current draw.
@heliarche Sorry but I thiink you misunderstood me. What I ment was that if you had an inverter in your car you could charge your batteries via a normal charger and still have a 'wireless/cordless' Drill. I have done this myself between jobs.
@CovKid80 I gotcha now, yea that'd be fine.The reason I did it the way in the video is because my batteries crapped out.One wouldn't hold a charge and the on the other one, the bands connecting the cells were broken in a few places.So instead of wasting money to get new batteries for a crap kit, I just modified it.Not as handy as cordless but better than using a cold chisel at the junkyard.
@CovKid80 It takes approximately and hour to charge a Dewalt battery ad if the battery has been used for any length of time it gets hot and has to cool before the charger will work - even more wait time. I don't have to "wait" with my system.
Heck, this is too easy. Just got my 14.4v drill running, by using an old 6v battery casing, some wire soldered onto the internal connections and croc clips!
Did you ever hear of an inverter so you can charge the battery while you were driving to the boonies!!! Your fix would be great if your car battery was 18 volt but since it is not it will cause your drill to fail premature running on 12 volt.
@TRACATAK It's more expensive, costly, heavy, prone to breakdown and environmentally unfriendly. Most of all though, it does not provide a huge source of immediate power
@LitterboxDiorama I have a majority of the tools in the Dewalt 18 volt lineup to include the impact tools and the 90 degree drill. You can speed up repairs on a vehicle "in the middle of nowhere" with these tools just for starters. When I worked in the air conditioning trade years ago I would do "rough-ins" for the ductwork which required cordless tools to accomplish. On many occasions the batteries did not last and I wish then that I had the system I have now!
@LitterboxDiorama You can remove lug nuts from your car for one thing. Once you loosen the nuts you can quickly removed or install them with the use of a drill with a socket driver. I have done this on many occasions when flat tires occured due to driving over roofing nails at a job site.
way to go aboonski! I did the same to a old 9v cordless of mine a few years ago, works like a charm. Did not know that there were others out in cyberland of similar inclination
@viewmasta I had a feeling my idea was not something that others had not tried and accomplished before. I wanted to do the video to entice others to fabricate their own "cheater battery packs" in an attempt to reduce the number of people forced to buy outrageously priced Dewalt replacement batteries. I really think Dewalt can cut their price down by 50% and still make a profit but they are stubborn! I keep all of my bad batteries and convert them over as they die.
@Gothtecdotcom I did this out of sheer necessity. Dewalt batteries do not last as long as they should and are a ripoff for the consumer. Any way to "cheat" Dewalt out of a sale is good as far as I am concerned. Their cordless tools are pretty much top-of-the-line but their batteries just suck!
This video has given me what i think is a pretty good idea.. Take one of my spare toolboxes and mount two 12v motorcycle / lawn tractor batteries inside the box wired in series to yield 24v... Then connect the power pack up to a 12/2 extension cord... I will experiment with cord length to achieve an optimal voltage drop of around 18-20 volts... convert one of my dead Ryobi batteries as a plug on the tool end... I have 9 various ryobi tools and this would make an ideal remote power pack..
@rainmechanic That's a great idea! My objective was to never buy another Dewalt battery unless the price dropped significantly (like to about half of what they are now). I just cannot understand why replacement batteries cost $86.00 plus tax for the 18 volt Dewalt battery tools.
I did a search because I had the same idea. I appreciate your posting this video but you haven't shared any information on how you rigged up the innards of your battery case. Do you have any circuitry inside or did you just solder wires to the positive and negative leads? Some details, photos would be appreciated. I think everyone agrees that companies make their fortunes on the reusables and not the machines,, printer ink and toner being one of the most notable.
@JohnProkos I'm thinking of doing a reply to this video but it's really very obvious stuff. One thing I think should be made clear is that a fuse should be included and thick enough wire should be used.
Also, if it's connected to the battery the wrong way around it could destroy the speed controller or cause a fire. There is a very simple way to prevent this by using a diode.
WTF, why would anybody want to do this? In 20 years i've never run out of battery juice and if i did i put one of my spares in. You are going to fry the drill with the car battery amperage. 12 volt camera battery, 12 volt drill battery and 12 volt car battery different amperages.
@Orrphan Voltage is voltage. The drill or any of the other Dewalt tools only use the amps necessary to run the tool with or without a load. If anything would damage the electrical portion of the tool it would be voltage in excess of its designed rating. By use of a long extension cord, the voltage drops from 24 down to around 18+ - so it is just like running the equipment with a dewalt battery only without the "fade" as the battery starts running out of juice.
@aboonski Wrong wrong. The battery is 18V when run down it is still nearly 18 V just won't supply the current needed for torque. Running it on 12 means it will draw more current to do the same work. More current means more heat in the windings - burnt up drill. plain and simple.
@1Rowdy1derful All of my tools still function just like new and I use them with my "cheater system" on a daily basis. I still say the voltage tapers off as the battery gets weak. If you don't believe me, try checking a depleted flashlight battery and let me know if it still has 1.5 volts. Please do not tell me that flashlight batteries are different.
@aboonski you are incorrect in saying that more current will be drawn if less volts are applied. In saying so, it tells us that you do not understand the most basic tenets of electrical engineering - Ohm's Law.
I = V x R
R is of course a constant here. Think about it.
The drill will have less maximum available power at just 12v though but it will work just fine for most jobs
@g7txu You my good man are the one that is wrong. Son't get insulting with me you moron. Go read you're book again, maybe this time pay attention. I am afraid everything I said is based on a real understanding of Ohms law. I have probably applied ohms law in practice more times than you have wiped you're ass. I will give you that R is constant although it is not. (variable speed drill, how do you think they cause a variation in the speed?) So if R is constant and V or E goes from 18 to 12
@g7txu OK buddy. lets try it this way, just think a minute. High school physics. say your driving a screw with you're gun one screw with the 18 v battery and one with the 12 v setup. both do the same amount of work but the one does it with less voltage. So if it does it with less voltage something has to make up for the work done. Thus more current. put an ammeter in series between the battery and trigger and run some tests and then get back to me.
@1Rowdy1derful I now understand your confusion. I'll use my degree level electronics rather than what they taught at Comprehensive school if that's all the same to you.
A 12v tool outputting a given amount of power will indeed draw more current that an equivalent 18v tool. The current is higher but the power both in and out is equal. The resistance of the respective motor windings will be different and so is not a constant.
@g7txu Well that is just amazing. I am beginning to understand why you can't understand this stuff. Your degree level electronics needs a little polishing. Sorry my BA in Electronics Engineering from Colorado State University must not measure up since it is from I assume a non comprehensive school. But then they taught us that ohms law I = V/R not VxR. Maybe you could show me the derivation of that formula and how you got there. Geess the power in and out are equal, imagine that.
@g7txu Then just what do you think will happen to the I ? Hmmmm Oh yeah that is correct according to ohms law, it will increase, Isn't that what I said
@aboonski you are incorrect in saying that more current will be drawn if less volts are applied. In saying so, it tells us that you do not understand the most basic tenets of electrical engineering - Ohm's Law.
I = V x R
R is of course a constant here. Think about it.
The drill will have less maximum available power at just 12v though but it will work just fine for most jobs. DeWalt make 12v drills too of course
@aboonski check a car battery, little voltage difference in a good battery and a bad one, in general only a single volt different. 12.2 -12.8 is godd while anything under 12 volts is bad
@aboonski Oh no there is no difference in the batteries. lead acid batteries are exactly the same as nicad's and nickle metal hydride. After all they are all batteries. Right. Go measure the voltage on a new flashlight battery genius.
@schnappy00 And just how is it that you figure that it is against ohms law. Think about it work with the formula a little if you understand it you will see that everything I said is based on ohms law, and experience in the field. Just basic rules really, and ohms law is a simple algebraic principle that says V or E is inversely proportional to I How did you get porp out of it.
I have plans to do this to an old coleman 18 volt drill but with a 12V car lighter cord and a jump pack just like Mah3525 was mentioning. The drill is part of a set that includes a circular saw a sawzall a vacuum and a light and power sander and 2 batteries and a charger.
I will remove the fuse from the plug and replace with a piece of metal and use lamp cord as the wire from the lighter and the dead battery pack and I will be running it off a 12V jumpstart box. I just hope it doesnt draw more than 12 amps. but if it does I'll just put clips on it or something for the red jumper cables to grab onto. if the car lighter socket in a car is one that has the lighter heater thing that pops out. will that have enough amps.
@1Rowdy1derful my application does not use the cigarette lighter port. Depending on the tool that I would be using, I could use the cigarette lighter port as long as the "load" on the tool was not too great - more torque needed, more current draw used.
PLEASE DONT READ THIS. YOU WILL GET KISSED ON THE NEAREST POSSIBLE FRIDAY BY THE LOVE OF YOUR LIFE. TOMORROW WILL BE THE BEST DAY OF YOUR LIFE. HOWEVER IF YOU DONT POST THIS COMMENT something bad will happen. NOW UV STARTED READIN DIS DUNT STOP THIS IS SO SCARY. SEND THIS TO 5 VIDEOS IN 143 MINUTES WHEN UR DONE PRESS F6 AND UR CRUSHES NAME WILL APPEAR ON THE SCREEN IN BIG LETTERS. THIS IS SO SCARY CAUSE IT ACTUALLY WORKS THIS ACTUALLY WORKS
@croakerchoker504 Anolther croaker that thinks they can just re arrange ohms law to fit their situation. constant R and 5 times I your drill would turn into a sparkler. you may have 5 times as much current available but it will not use that much before it blows.
No inverter is used here - just the power from the vehicle batteries and the alternators when the truck is running. I suppose I could set up an inverter in the truck to run the charger for the Dewalt batteries but at the present time I don't even have one good 18 volt battery to charge. I use this systen to run all of my Dewalt power tools and I am satisfied with the results. You will see "white blackbirds" when I pay $90 for a new 18 volt Dewalt battery!
I work on tools like this... 12v will work, but on the vast majority of tools, running on a different voltage is hard on the tool... if you have a 12v tool set, this is actually pretty cool idea... But if you have 18v or higher (24v or 36v) youre pushing your luck... it'll get toasted quicker than normal... but if you are in a pinch, this will work pretty well
Should work just as well as the Dewalt tools do on 12 volts. Twelve volts DC is twelve volts DC whether it comes from a dry cell battery or a car battery. You can hook two of the 6 volt lantern batteries together in series to power your drill also. My next project will be to rig up a series of 12 1 1/2 volt 'C' rechargeable batteries to power my Dewalt tools. I should be able to charge them with the Dewalt charger too.
As your batteries start to "fade", the voltage tapers off and so does the power and RPM the drill can obtain - but it still works fine with less voltage only slower. Provided you do not bog the drill down it will be just fine with the lower voltage. I have run my Dewalt 18 volt tools with 12 volts on many an occasion prior to finding out how well they run via my 24 volt NATO plug application. Just don't expect the same performance with the lower voltage than that of the 18 volt battery.
It would work but I would recommend using one of the 12 volt tools and not the 18 volt ones because of the power drop that comes with the use of a long power cord. It's all about resistance...
You mean a "selector switch" - that's a Great idea and something I just might do. I figured by now that Dewalt would lower the price of their batteries but no such luck! It would require tapping the positive lead inside the battery with a two-way switch which would allow external power to get to the business end of the battery (where it plugs into the tool) and then you could bave your cake and eat it too!
Actually I am not charging the battery here but using the 24 volt system in my military truck to run my 18 volt Dewalt power tools. I have removed the guts from the battery pack and direct wired the empty battery case so that I can pipe the power into the drill (or other tools) from an external source - that could be anything from a transformer to a bunch of 'D' cells hooked in series to come up with sufficient voltage to run the tool.
oh ok I see what your talking about in your reply, and is it possible to make the wires longer to use on a Job site that has no gas in the gas powered generator?
I'm pretty sure a 12V charger would be the way to go here. It still only takes an hour to charge up one of these bad boys. These batteries are great. I just now replaced two of these I've been using on a daily bases for ten years.
I am not charging the battery in this video; this is a battery pack by-pass (no cells in the battery pack). Ironically, Ryobi does sell a charger that plugs into the cigarette lighter - I bought one of them for my Ryobi tools. I am down to one Dewalt 18 volt battery now and it is starting to fail. With my "battery cheat" I will never need to buy another Dewalt battery again but will have to use a "cord" to power my 18 volt Dewalt tools from now on. Thanks for the comment!
I just did this to my Skil 18v battery. Thanks for posting this vid, it helped me a lot. My batteries are about 3 years old and one only holds a charge for a few minutes and never fully recharges. I wasn't looking forward to buying new batteries and this works better for me at the moment. Take care man.
Thanks for the comment! This really works for me! $86.00 plus tax for a new 18 volt Dewalt battery is just too much money for a battery that does not last long.
Thanks for the compliment - I AM a redneck accordig to my fiance. Dewalt batteries just cost too much and don't last. Aside from not being able to use my Dewalt cordless tools I figured this to be an alternative to letting them sit and rot. Thanks for posting the comment!
Nothing worse than being in the middle of nowhere and having flat batteries, so i'll go flatten the car battery too. unless what you want to drill is in the engine bay I would use welding leads to handle the resistance, flat car battery and a burning car..
If you can find a cheap 12-18volt DC boost converter you can get full performance. I'm not sure but I think you'll need roughly 10-20amps so it might not be feasible.
That's pretty funny because I AM a redneck! Why pay for things when you can obtain them for free? Most people who like this video enjoy knowing that materials don't cost a ton of money like the Dewalt batteries do. This is an "alternative" to buying expensive batteries.
If you are trying to use a 600-900 cold cranking amp battery, you are going to burn up the brushes on the dewalt tool prematurely. Also, you would need much larger size wires than this person is showing, to be able to use the tool efficiently more than 6 feet from the battery.
Come to think of it, whats the use of a " cordless tool" if you have to wire it to a battery ?. Seems pretty stupid!
There were a couple of times where I was at a job site with no other power tools but my 18 volt Dewalt equipment and the batteries "died" before I could finish the task I started on. So far, no problems with any of my Dewalt tools and the power cord that I use works just fine. I think it is a 25 foot cord. By the time you consider the resistance in the 25 foot cord, the power at the end would be very close to 18 volts when using a 24 volt system like I have in my military trucks.
Do you work for Dewalt by chance? Dewalt batteries are inferior and therefore should cost a lot less than the $86.00 they sell for in our area. My next "cheat" will be using an 18 volt Ryobi battery pack to power my Dewalt tools. Very simple to accomplish but also requires a power cord running from the Ryobi battery to the Dewalt tool. For a brief time, someone had an adapter for this but Dewalt intervened and the seller pulled the item. Watch the video about this (still there).
I don't understand why if we have standard cell geometries, i.e. AA, AAA, C, D and we have standard mains power plugs, i.e. 110VAC we can't have standard tool battery connectors...
if this guy has a problem with powercords then you could attach a small sealed lead acid battery to your drill and charge that buy simply hooking it up in parallel to your car battery.
I didn't put the motorcycle battery in this video as another power source but yes that will work fine for the 12 volt Dewalt cordless tools; a little shy of what you need for the 18 volt Dewalt tools. I have alligator clips installed for my cheater wire already that can hook up to any wet cell car or motorcycle battery but I have found my 24 volt NATO plug on my military vehicles is the best source of power for the 18 volt Dewalt battery cheat so far. Thanks for the comment by the way!
There is a flaw in your first statement, the fact that the battery "can" supply 900 amps doesn't mean that it will force that current through the motor. Google "ohms law"
ohms law isn't all there is. The power transfer has to do with the internal resistance of the battery. I think nicad and lead-acid are comparable so there shouldn't be a problem, especially using 12v on a 18v motor.
how do you figure this deviates from ohms law? i was simply stating the fact that if he connected the battery capable of providing 900 amps that didn't mean that 900 amps "would" flow
lol! I find it simply dumb to rig something that is perfect already. Well, if your battery died, you should have gotten 2 in the first place. I always have a spare battery with a charger to do project.
Well Moe7133, thanks for the comment. If Dewalt batteries were around $35.00 at Home Depot or Lowe's I would buy about ten of them. I bought a bunch of Ryobi 18 volt cordless tools plus their premium Lithium battery and a charger which plugs into the cigarette lighter in my car. Now I have to make up a "cheater" to use Ryobi batteries in my Dewalt tools which will make my videos, like this one, obsolete. At one time there was an adaptor commercially available but Dewalt forced its removal.
Generally I do but at the same time that increases the voltage substantially where I pull the power from. With a really long extension cord this is not a problem because the length of the cord drops the voltage down when you are drawing power from it.
I might try doing that with the special battery case that I made just to see the voltage the charger puts out. It is possible that the charger may not provide power due to the modifications that I made to the battery for this "cheat". Another thing that must be considered is the amperage draw from the tool that is being used which could damage or destroy the charger which probably only provides enough wattage to charge the batteries.
You could use the 24 volts on that 18 volt drill also. Just clamp the neg to the first battery in series and the postive the the last battery in series.
I thought about that but was afraid the extra voltage might fry the cordless tools. I could very easily tie into the NATO plug on either of my military trucks to get the 24 volts; I even have and accessory female end to fit into the NATO outlets. I am so disgusted with the inferior quality of Dewalt rechargeable batteries that I am working on a "cheater" to use Ryobi 18 volt batteries which cost about half of the Dewalt units. Remember this, "A product is only as good as its cheapest part!"
This is a great idea to still use the tool when you are out in the field and have no more good batteries left, but you still only get 2/3 of the power to finish the job. 18v tools run poorly on 12vdc. I use a generator in the field, and want to build an 18v dc power supply transformer that can plug into 110vac with a cord, so you can then use them as corded tools after your batts are all used up. I know why not use the gen. to charge batteries. warm batteries wont charge & it takes too long.
bulletman100 3 weeks ago
freagin smart!
joemiked 1 month ago
@joemiked Thanks! I thought so too. I still have not been contacted by Dewalt about this and have no idea if anyone else has actually made one of my "battery cheaters" as yet. I am amazed at how many hits this video has had since I posted it! People either love it or hate it but the facts are, I am still using this to run my Dewalt cordless tools and no problems to date. I guess that speaks for itself,,,,,,
aboonski 1 month ago
Wow some serious issues people have with this, it's just as well you told everyone that they MUST use this mod on ALL their battery operated equipment (add heavy sarcasm). I guess some people don't want options, oh well they will be fine up until someone moves their dinner plate and they starve.
pjharro 2 months ago
How do you get 18 volts from a 12 volts battery.
jdmahe 2 months ago
military
DZFenn 3 months ago
i am surpised the amprage from car battery didnt burn out the drill motor.
Lokivoid 4 months ago
@Lokivoid Impossible. The drill will only draw the current it needs
tmastersat 2 months ago
@tmastersat Absolutely correct! The drill draws current to supply torque. Under load, the motor will attempt to supply torque to the load by drawing the required current. If the line supply voltage is depressed, the current draw must increase. Under light loads, this 'cheat' may be fine. Under serious loads, this 'cheat' may damage your expensive equipment or worse. Viewers should be beware of YouTube engineering. A healthy sense of skepticism should be applied universally, even to this comment.
bradjones06 2 months ago
@Lokivoid The same reason a car radio rated at 4 amps doesn't draw more amps if connected to a car battery with, for example: Die Hard Gold Group Size 59, 590 CCA (cold cranking amps).
Do you think every electrical device in a car is going to draw the maximum available amps?
A device draws amps it is designed to at a given voltage. A drill that draws 3 amps at 18 volts (54 watts)
(I (amps) x E (volts) = P (watts)) will draw 4.5 amps at 12 volts (I (amps) = P(watts) divide by E (volts)).
rlwieneke 2 months ago
How to build a magnet generator
curbman256 4 months ago
I have a 18 volt grease gun and the charger got melted . Thay stoped making it and a new one is $200.00 . The guy that greases my equipment loves this in stead of his arm cramping. Thanks for the idea we have no power in the field.
curbman256 4 months ago
@curbman256 Definitely appreciate the positive comment after so many negative comments have been posted about this. Now that all of my Dewalt batteries no longer hold a charge I am using my "battery cheater" to power them instead of purchasing new batteries for $86.00 plus tax. Regardless of what people say about taking a cordless tool and going to a cord again it still eliminates the old 115 volt power tools that we were once limited to when I was growing up.
aboonski 4 months ago
uh i think they call this a corded drill.
AQSKY 5 months ago
you can damage an 18 or 24v tool by using a 12v supply. When voltage drops, current consumtion increases and can easily go beyond the maximum range of the tools component's current rating. This causes the tool to have a much better chance of overheating and malfunctioning. In addition, it will also void your warrenty.
mastergx1 7 months ago
@mastergx1 WRONG, when voltage drops current drops.
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them.
SOOO the only thing that can cause the current to go up is an increase in voltage, or a decrease in resistance, which would require this guy to rewind his little drill motor with either less turns of wire, or a heavier wire,
Fentanyl3 4 months ago
I wondered if there was some way of taking an 18V battery or 24V or whatever volt and placing them into a sort of Mini Inverter (sorta looks like the battery charger that comes with the batter) this way you can use the power of that battery to run small applicances, laptop computers, mini tv's or even lights. Has someone already invented one of these things. I would buy one and have a couple of batteries set aside for when power might go out. This would be a great backup.
HappyEndingsRescue 7 months ago
Do you think a computer power supply is strong enough to power a drill?
dying2l 7 months ago
This doesn't seem like a good idea. I'm not sure what type of motor is used here, but using 2/3rd the specified voltage cannot be good for it; this "cheat" will likely result in too much current draw and potentially overheat or permanently damage the drill motor. The below discussion about Ohm's law is misguided at best. While motors do have equivalent circuit models, reducing the discussion to V=IR is an oversimplification. Don't trust YouTube's engineers over Dewalt's.
bradjones06 7 months ago
@bradjones06 Ohh, so ohms law suddenly after years and years doesn't apply to motors any more? Ahh, thanks for the update...
Fentanyl3 4 months ago
@Fentanyl3 Ohm's law does work...that is the problem. The motor must deliver fixed power to the load. If the voltage drops, the current must increase, P = V*I. Higher current draw means more heat in the motor wiring. Enter Ohm's Law: P_loss = I^2 * R, where R is the resistance of the copper wiring. This power is lost as heat which results in increasing copper resistance, resulting in even more heating and eventually a destroyed motor. Google: "electric motors and voltage"
bradjones06 4 months ago
@bradjones06 You dont understand ohms law. That could only hapen if the current in the bat stayed the same and only the voltage dropped. Since the current will drop with voltage as the bat goes down you will would not have a problem. You see the total wattage of the battery goes down as it dies both v and I goes down making it impossible for your statement to be true.
tmastersat 2 months ago
@tmastersat You cannot compare a discharged 18V Dewalt battery to a 12V car battery. You are correct in that by the time your Dewalt's battery is that low (assuming it can even reach 12V) it can not supply any consequential current. However, a car battery can supply hundreds of amperes. Under any serious load, your 18V drill can draw excessive current from a 12V car battery which can easily supply a damaging amperage to your tools. My intent is not personal attack but to inform viewers. Beware!
bradjones06 2 months ago
Why not just use a 12 volt inverter to charge the Dewalt battery from your vehicle?
BornInAmerica 7 months ago
ha ha ha it is funny how people react to this thing, ok, maybe you dont see the point of doing something like this but let me tell you that what I like about it is the principle , I work as a handyman and sometimes you just need to make a cut using a cordless circular saw but your battery will be ready in 1 hr, so what you gonna do ? I'm not saying this is perfect just that It may be a good idea, instead of carrying a cordless drill and a cord drill you can use one adaptor and you set, see ????
jojuma91 7 months ago
@jojuma91 Thank you! Definitely does not appeal to everyone as you can see. What I like about using the NATO plug to power my tools is continuous power that does not taper off due to battery fade.
aboonski 7 months ago
@aboonski Yea, I know my friend just keep the good work, like I said I like the Idea because you really need something like that sometimes
jojuma91 7 months ago
ya some igiots have to figure a need to do something stupid like this. really you are out mending fences with a drill? and since you modified a battery perhaps you would be smart enough to buy a car charger and an extra battery, then when your battery dies while you are mending fences with it you could swap batteries. nope some dumb igiot will pull their truck up close to the fence and pull out their specially modified battery and hook it up to their truck battery.
what a dumb ass
doppydufus 8 months ago
@doppydufus You are just jealous because I thought of this idea and you didn't.....
aboonski 7 months ago 8
@aboonski Yes very jealous that my IQ is above 160 and not at 90 like yours.
doppydufus 7 months ago
@doppydufus ?? why so much hatred over a battery ???
i have 2 words for you. Anger Management.
caveman1968 5 months ago
@doppydufus yeh he's the igiot....
gaypotter 5 months ago
what is the pin out?
dying2l 8 months ago
bit of a fucker taking the car battery to the top of a ladder.
mansfieldram 8 months ago
Old 12 volt tools are cheap if not free. I use the same set-up when I have to fix fences or gates on my ranch. Waiting in the 95 degree summer sun for a battery to charge is not an option. There are those that get the job done, and those who wait for a little green light to say it's ok to work again. Livestock don't wait for recharged batteries.... A COUNTRY BOY CAN SURVIVE!!!
sonofthesouthFLA 8 months ago
@sonofthesouthFLA Finally somebody who sees the value in my modification! Thanks for taking the time to add this comment!
aboonski 8 months ago
@aboonski Your welcome brother....
I would rather buy a new 220 amp hour deep cycle battery than a new drill battery any day. Try using that drill battery for a water pump, 650 CFM fan, refrigerator or any other survival gear you need after a major storm.
Keep up the good work! Though it may feel like it, your not the only man on the island.....
sonofthesouthFLA 8 months ago
what a knob.,.....!
nickffc 9 months ago
I can see how this is useful, as for messing up a $100 battery, all you need is too keep a dead dewalt battery in your toolbox with the 12v adapters.
cuzz63 9 months ago
ok, i see the use if you don't have another battery, if your burning through so many, then get a corded one and a power inverter. reading the 'engineers argue is funny,
Arguing with a engineer, is like mud wrestling with a pig, you both get dirty, but the pig enjoys it.
Bowfinger6383 9 months ago
@Bowfinger6383 I like your response! A lot of engineers and electricians are highly critical of the way I run my tools but voltage is voltage and I have not had a bit of trouble with any of my Dewalt cordless tools and don;t anticipate any either. They say "necessity is the mother of invention" and I felt it necessary to use this procedure to let me use my tools when my batteries failed me.
aboonski 9 months ago
USELESS. if you want to change a cordless into a cord drill, then why not use a normal 120VAC drill? and if you so want to use a car batery use an ondulator and Tadaa! done. no need to fuck-up a 120$ cord less drill for that.
hitachi088 9 months ago
Will this work with a 9.6 volt battery?
TheLakesidechef 9 months ago
@TheLakesidechef
yeah but slower.
hitachi088 9 months ago
Im not too sure if you make any sense, just think about it, if a cat poos twice and your drill is hooked up like that, your sure gonna wind up on a roof without a paddle!!!DUH!!
savagegiraffe1 9 months ago
congratulations. You have just turned your cordless drill into a mobile? drill. Now all you have to do is get the truck through the door of your house to use it....
dunc1b 9 months ago
@dunc1b I use a 100 foot extension cord to bring the power to the work site - any extension cord works for this application.
aboonski 9 months ago
Cool
plazmafeld 10 months ago
@aboonski Is there drill with battery and power plug if battery goes dead so I can plug it up on the wall and keep doing my work?
goodson305 10 months ago
@goodson305 All you would need is a transformer that puts out 18 volts DC and a modified battery like the one I made and you are in business. You can even use things like a car battery charger to power your tools. It works - trust me because I have used these things but did not make videos but may do so because of your inquiry.
aboonski 10 months ago
@aboonski Thanks
goodson305 10 months ago
turned a cordless into a corded, ya going backwards pal
dano1p 10 months ago
@dano1p At face value it does look I am going backwards but when all of your batteries go bad it's nice to know another way to make your tools function without spending all that money for new ones which cost around $90.00 each. I promise you that, if enough people fabricated this system for their Dewalt tools the cost of replacement batteries would drop considerably. I am working on a battery pack that will use rechargeable 1.5 volt AA cells that you can buy and replace if they go bad.
aboonski 10 months ago
@aboonski you can already buy rechargeable C sized batteries, which is what they use.
dunc1b 9 months ago
For years now I pickup 12v used dewalts for there triggers and motors to put into my 18v drill when I burn through them, all the regulatory voltage and crap is in the battery case, the drill is just motor and a basic trigger. So stop y'alls over educated argument.
Wen someone tells me there an engineer I say "Oh they let you drive the train?"
frankt04 10 months ago
I can agree with Rowdy , Its simple ohms law. I = P / E . as E increases I decrease. and as E decreases , I will rise.Also, voltage drop is calculated after 75 feet. torque, rpms of motors ,brushes , and windings will have minimal effects on current . Power output will be greatly changed .I wait to be corrected.
ThriilmeYo 11 months ago
cuz everyone needs a electric drill in the middle of nowhere lolz
catfishhunter2012 1 year ago
very good. pls look my profile. I also put my cordless drill to a new level.
gottogetit111 1 year ago
Very creative of you, but, if I'm going to have my Dewalt drill in the middle of nowhere with my car, I'll also have my 12v to 120volt inverter with me so I can recharge the battery using the regular Dewalt charger. Or better yet, my 15 minute Dewalt charger.
JustSomeOldGuy 1 year ago
Could you post a video about how to make my gas powered lawn mower have to be plugged into the wall?
mickblock 1 year ago
@mickblock I'll do that but having trouble getting the electric starter to turn fast enough to cut grass.
aboonski 10 months ago
@mickblock
AHAHAHA~~
MegaGarrett07 9 months ago
yes and i could also be in the middle of nowhere and then i should have my 10 person rubber boat in the trunk in case it gets flooded. and i could be in the middle of nowhere at my nowhere house and have to drill something on the 12th floor and then my 500 yard extension cord comes in handy! you are a stupid asshole. your idea is not worth used toilet paper. asshole.
majorpainful 1 year ago
@majorpainful that's some piss poor trolling
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polysemousncrk 1 year ago
I've done this myself some time ago.On trips to the junkyard(where I can bring my car in)it's very handy.I have an el-cheapo kit with a reciprocating saw, screw gun, and circular saw.I can use the hollowed out battery as a 12-V adapter for all three.
heliarche 1 year ago
can i do this with any cordless drill
janz1234567898 1 year ago
@janz1234567898 Pretty much yea.I have a kawasaki set I've done it too, and before that I did it to a black and decker.
heliarche 1 year ago
@heliarche does it matter if its not 18volt drill
janz1234567898 1 year ago
@janz1234567898 No, mine were 14 and 16 volt.The worst that happens is that they don't have quite as much power, but it won't hurt a thing.Just make sure that it is at least a 12 volt drill.
heliarche 1 year ago
@heliarche ok thanks
janz1234567898 1 year ago
Why not use a power invertor and charger from the 12v lighter?
CovKid80 1 year ago
@CovKid80 You don't need an inverter, it's already DC current coming from the car, and the tool uses DC current.You just need to hook it up.The cigarette lighter wouldn't handle the current draw.
heliarche 1 year ago
@heliarche Sorry but I thiink you misunderstood me. What I ment was that if you had an inverter in your car you could charge your batteries via a normal charger and still have a 'wireless/cordless' Drill. I have done this myself between jobs.
CovKid80 1 year ago
@CovKid80 I gotcha now, yea that'd be fine.The reason I did it the way in the video is because my batteries crapped out.One wouldn't hold a charge and the on the other one, the bands connecting the cells were broken in a few places.So instead of wasting money to get new batteries for a crap kit, I just modified it.Not as handy as cordless but better than using a cold chisel at the junkyard.
heliarche 1 year ago
@CovKid80 It takes approximately and hour to charge a Dewalt battery ad if the battery has been used for any length of time it gets hot and has to cool before the charger will work - even more wait time. I don't have to "wait" with my system.
aboonski 9 months ago
@aboonski You may not have "wait" but you no longer have a cordless drill! Surely you have more than 1 Dewalt battery!
CovKid80 9 months ago
@CovKid80 Why not use some of the methods to rejuvenate the batteries if possible or repair the one with the broken bands?
1Rowdy1derful 1 year ago
Heck, this is too easy. Just got my 14.4v drill running, by using an old 6v battery casing, some wire soldered onto the internal connections and croc clips!
Aboonski, you'll have to marry me of course! X¬D
wordreet 1 year ago
Excellent! Aboonski, If this works, I'll be the goatee bearded mother of your future children!
wordreet 1 year ago
Did you ever hear of an inverter so you can charge the battery while you were driving to the boonies!!! Your fix would be great if your car battery was 18 volt but since it is not it will cause your drill to fail premature running on 12 volt.
tomco78 1 year ago
why not just get an inverter, plug it in to your cigarette lighter and use your charger while you drive to nowhere
TRACATAK 1 year ago
@TRACATAK It's more expensive, costly, heavy, prone to breakdown and environmentally unfriendly. Most of all though, it does not provide a huge source of immediate power
g7txu 1 year ago
Then again, if your stranded in the middle of nowhere....what the hell would you need a drill for?????
LitterboxDiorama 1 year ago 8
@LitterboxDiorama I have a majority of the tools in the Dewalt 18 volt lineup to include the impact tools and the 90 degree drill. You can speed up repairs on a vehicle "in the middle of nowhere" with these tools just for starters. When I worked in the air conditioning trade years ago I would do "rough-ins" for the ductwork which required cordless tools to accomplish. On many occasions the batteries did not last and I wish then that I had the system I have now!
aboonski 1 year ago
@LitterboxDiorama You can remove lug nuts from your car for one thing. Once you loosen the nuts you can quickly removed or install them with the use of a drill with a socket driver. I have done this on many occasions when flat tires occured due to driving over roofing nails at a job site.
aboonski 7 months ago
Ghetto ass hack! Why not just buy a new battery $65-$85 instead of taking your time and labor to ghetto rig this thing?
SydeshowMO 1 year ago
way to go aboonski! I did the same to a old 9v cordless of mine a few years ago, works like a charm. Did not know that there were others out in cyberland of similar inclination
viewmasta 1 year ago
@viewmasta I had a feeling my idea was not something that others had not tried and accomplished before. I wanted to do the video to entice others to fabricate their own "cheater battery packs" in an attempt to reduce the number of people forced to buy outrageously priced Dewalt replacement batteries. I really think Dewalt can cut their price down by 50% and still make a profit but they are stubborn! I keep all of my bad batteries and convert them over as they die.
aboonski 1 year ago
Clever... simple but clever!!!
Gothtecdotcom 1 year ago
@Gothtecdotcom I did this out of sheer necessity. Dewalt batteries do not last as long as they should and are a ripoff for the consumer. Any way to "cheat" Dewalt out of a sale is good as far as I am concerned. Their cordless tools are pretty much top-of-the-line but their batteries just suck!
aboonski 1 year ago
This video has given me what i think is a pretty good idea.. Take one of my spare toolboxes and mount two 12v motorcycle / lawn tractor batteries inside the box wired in series to yield 24v... Then connect the power pack up to a 12/2 extension cord... I will experiment with cord length to achieve an optimal voltage drop of around 18-20 volts... convert one of my dead Ryobi batteries as a plug on the tool end... I have 9 various ryobi tools and this would make an ideal remote power pack..
rainmechanic 1 year ago
@rainmechanic That's a great idea! My objective was to never buy another Dewalt battery unless the price dropped significantly (like to about half of what they are now). I just cannot understand why replacement batteries cost $86.00 plus tax for the 18 volt Dewalt battery tools.
aboonski 1 year ago
@aboonski
I did a search because I had the same idea. I appreciate your posting this video but you haven't shared any information on how you rigged up the innards of your battery case. Do you have any circuitry inside or did you just solder wires to the positive and negative leads? Some details, photos would be appreciated. I think everyone agrees that companies make their fortunes on the reusables and not the machines,, printer ink and toner being one of the most notable.
JohnProkos 1 year ago
@JohnProkos I'm thinking of doing a reply to this video but it's really very obvious stuff. One thing I think should be made clear is that a fuse should be included and thick enough wire should be used.
Also, if it's connected to the battery the wrong way around it could destroy the speed controller or cause a fire. There is a very simple way to prevent this by using a diode.
g7txu 1 year ago
WTF, why would anybody want to do this? In 20 years i've never run out of battery juice and if i did i put one of my spares in. You are going to fry the drill with the car battery amperage. 12 volt camera battery, 12 volt drill battery and 12 volt car battery different amperages.
Orrphan 1 year ago
@Orrphan Voltage is voltage. The drill or any of the other Dewalt tools only use the amps necessary to run the tool with or without a load. If anything would damage the electrical portion of the tool it would be voltage in excess of its designed rating. By use of a long extension cord, the voltage drops from 24 down to around 18+ - so it is just like running the equipment with a dewalt battery only without the "fade" as the battery starts running out of juice.
aboonski 1 year ago
@aboonski Wrong wrong. The battery is 18V when run down it is still nearly 18 V just won't supply the current needed for torque. Running it on 12 means it will draw more current to do the same work. More current means more heat in the windings - burnt up drill. plain and simple.
1Rowdy1derful 1 year ago
@1Rowdy1derful All of my tools still function just like new and I use them with my "cheater system" on a daily basis. I still say the voltage tapers off as the battery gets weak. If you don't believe me, try checking a depleted flashlight battery and let me know if it still has 1.5 volts. Please do not tell me that flashlight batteries are different.
aboonski 1 year ago
@aboonski you are incorrect in saying that more current will be drawn if less volts are applied. In saying so, it tells us that you do not understand the most basic tenets of electrical engineering - Ohm's Law.
I = V x R
R is of course a constant here. Think about it.
The drill will have less maximum available power at just 12v though but it will work just fine for most jobs
g7txu 1 year ago
@g7txu You my good man are the one that is wrong. Son't get insulting with me you moron. Go read you're book again, maybe this time pay attention. I am afraid everything I said is based on a real understanding of Ohms law. I have probably applied ohms law in practice more times than you have wiped you're ass. I will give you that R is constant although it is not. (variable speed drill, how do you think they cause a variation in the speed?) So if R is constant and V or E goes from 18 to 12
1Rowdy1derful 1 year ago
@1Rowdy1derful You are just wrong. If you take a purely resistive load and decrease the voltage across it, less current will flow.
For the sake of argument we can assume the motor and PWM speed controller will present a non linear load but the principle still holds.
g7txu 1 year ago
@g7txu OK buddy. lets try it this way, just think a minute. High school physics. say your driving a screw with you're gun one screw with the 18 v battery and one with the 12 v setup. both do the same amount of work but the one does it with less voltage. So if it does it with less voltage something has to make up for the work done. Thus more current. put an ammeter in series between the battery and trigger and run some tests and then get back to me.
1Rowdy1derful 1 year ago
@1Rowdy1derful I now understand your confusion. I'll use my degree level electronics rather than what they taught at Comprehensive school if that's all the same to you.
A 12v tool outputting a given amount of power will indeed draw more current that an equivalent 18v tool. The current is higher but the power both in and out is equal. The resistance of the respective motor windings will be different and so is not a constant.
An 18v tool fed with 12v WILL draw less current.
I = V x R
g7txu 1 year ago
@g7txu Well that is just amazing. I am beginning to understand why you can't understand this stuff. Your degree level electronics needs a little polishing. Sorry my BA in Electronics Engineering from Colorado State University must not measure up since it is from I assume a non comprehensive school. But then they taught us that ohms law I = V/R not VxR. Maybe you could show me the derivation of that formula and how you got there. Geess the power in and out are equal, imagine that.
1Rowdy1derful 11 months ago
@g7txu Then just what do you think will happen to the I ? Hmmmm Oh yeah that is correct according to ohms law, it will increase, Isn't that what I said
1Rowdy1derful 1 year ago
@aboonski you are incorrect in saying that more current will be drawn if less volts are applied. In saying so, it tells us that you do not understand the most basic tenets of electrical engineering - Ohm's Law.
I = V x R
R is of course a constant here. Think about it.
The drill will have less maximum available power at just 12v though but it will work just fine for most jobs. DeWalt make 12v drills too of course
g7txu 1 year ago
@aboonski check a car battery, little voltage difference in a good battery and a bad one, in general only a single volt different. 12.2 -12.8 is godd while anything under 12 volts is bad
coalandnuclear 1 year ago
@aboonski Oh no there is no difference in the batteries. lead acid batteries are exactly the same as nicad's and nickle metal hydride. After all they are all batteries. Right. Go measure the voltage on a new flashlight battery genius.
1Rowdy1derful 1 year ago
@1Rowdy1derful Are you sure? What you say makes sense, but goes against Ohms law: V prop to I.
schnappy00 1 year ago
@schnappy00 And just how is it that you figure that it is against ohms law. Think about it work with the formula a little if you understand it you will see that everything I said is based on ohms law, and experience in the field. Just basic rules really, and ohms law is a simple algebraic principle that says V or E is inversely proportional to I How did you get porp out of it.
1Rowdy1derful 1 year ago
I have plans to do this to an old coleman 18 volt drill but with a 12V car lighter cord and a jump pack just like Mah3525 was mentioning. The drill is part of a set that includes a circular saw a sawzall a vacuum and a light and power sander and 2 batteries and a charger.
coondogtheman1234 1 year ago
@coondogtheman1234 Most cars have a fuse in line with the lighter. You will soon blow that.
1Rowdy1derful 1 year ago
@1Rowdy1derful
I will remove the fuse from the plug and replace with a piece of metal and use lamp cord as the wire from the lighter and the dead battery pack and I will be running it off a 12V jumpstart box. I just hope it doesnt draw more than 12 amps. but if it does I'll just put clips on it or something for the red jumper cables to grab onto. if the car lighter socket in a car is one that has the lighter heater thing that pops out. will that have enough amps.
coondogtheman1234 1 year ago
@1Rowdy1derful my application does not use the cigarette lighter port. Depending on the tool that I would be using, I could use the cigarette lighter port as long as the "load" on the tool was not too great - more torque needed, more current draw used.
aboonski 1 year ago
This has been flagged as spam show
PLEASE DONT READ THIS. YOU WILL GET KISSED ON THE NEAREST POSSIBLE FRIDAY BY THE LOVE OF YOUR LIFE. TOMORROW WILL BE THE BEST DAY OF YOUR LIFE. HOWEVER IF YOU DONT POST THIS COMMENT something bad will happen. NOW UV STARTED READIN DIS DUNT STOP THIS IS SO SCARY. SEND THIS TO 5 VIDEOS IN 143 MINUTES WHEN UR DONE PRESS F6 AND UR CRUSHES NAME WILL APPEAR ON THE SCREEN IN BIG LETTERS. THIS IS SO SCARY CAUSE IT ACTUALLY WORKS THIS ACTUALLY WORKS
mlotman108 1 year ago
And?????
How do you do it?
disndat11 1 year ago
Was that truck in the background a deuce and half?
Henzzman 1 year ago
u tit
livesley18889 1 year ago
its actually like 13.5 - 14 volts but u get way more amps which is what really counts, probably like 5 times the amperage
croakerchoker504 1 year ago
@croakerchoker504 Anolther croaker that thinks they can just re arrange ohms law to fit their situation. constant R and 5 times I your drill would turn into a sparkler. you may have 5 times as much current available but it will not use that much before it blows.
1Rowdy1derful 1 year ago
thats awsome
serbmafioso3 1 year ago
buy makita that's quality
gansitomarinela38 1 year ago
power inverter in the back of the car?
manadio 1 year ago
No inverter is used here - just the power from the vehicle batteries and the alternators when the truck is running. I suppose I could set up an inverter in the truck to run the charger for the Dewalt batteries but at the present time I don't even have one good 18 volt battery to charge. I use this systen to run all of my Dewalt power tools and I am satisfied with the results. You will see "white blackbirds" when I pay $90 for a new 18 volt Dewalt battery!
aboonski 1 year ago
Comment removed
TwistedGambino 2 years ago
I work on tools like this... 12v will work, but on the vast majority of tools, running on a different voltage is hard on the tool... if you have a 12v tool set, this is actually pretty cool idea... But if you have 18v or higher (24v or 36v) youre pushing your luck... it'll get toasted quicker than normal... but if you are in a pinch, this will work pretty well
pudodrewculous 2 years ago
I have 2 of the Skil 18volt drills, so they will run on 12 volts fine?
I want to rig mine up to a 12 volt jump battery back for mobility.
So with 12 volt it won't hurt the drill ?
Just run a little slower ?
Mah3525 2 years ago
Should work just as well as the Dewalt tools do on 12 volts. Twelve volts DC is twelve volts DC whether it comes from a dry cell battery or a car battery. You can hook two of the 6 volt lantern batteries together in series to power your drill also. My next project will be to rig up a series of 12 1 1/2 volt 'C' rechargeable batteries to power my Dewalt tools. I should be able to charge them with the Dewalt charger too.
aboonski 2 years ago
As your batteries start to "fade", the voltage tapers off and so does the power and RPM the drill can obtain - but it still works fine with less voltage only slower. Provided you do not bog the drill down it will be just fine with the lower voltage. I have run my Dewalt 18 volt tools with 12 volts on many an occasion prior to finding out how well they run via my 24 volt NATO plug application. Just don't expect the same performance with the lower voltage than that of the 18 volt battery.
aboonski 2 years ago
Hmm that would be awesome connected to a cigar lighter connector and like 25 ft long wire.
defendant420 2 years ago
It would work but I would recommend using one of the 12 volt tools and not the 18 volt ones because of the power drop that comes with the use of a long power cord. It's all about resistance...
aboonski 2 years ago
you should of made it so the battery had it guts but it had a switch that changes to off,external,internal so you could always just use one battery
chickenpoper 2 years ago
You mean a "selector switch" - that's a Great idea and something I just might do. I figured by now that Dewalt would lower the price of their batteries but no such luck! It would require tapping the positive lead inside the battery with a two-way switch which would allow external power to get to the business end of the battery (where it plugs into the tool) and then you could bave your cake and eat it too!
aboonski 2 years ago
I have to say charging the Dewalt cordless drill on a car battery is very creative indeed... Thanks for sharing!
toolreviews 2 years ago
Actually I am not charging the battery here but using the 24 volt system in my military truck to run my 18 volt Dewalt power tools. I have removed the guts from the battery pack and direct wired the empty battery case so that I can pipe the power into the drill (or other tools) from an external source - that could be anything from a transformer to a bunch of 'D' cells hooked in series to come up with sufficient voltage to run the tool.
aboonski 2 years ago
oh ok I see what your talking about in your reply, and is it possible to make the wires longer to use on a Job site that has no gas in the gas powered generator?
toolreviews 2 years ago
You are very welcome! Thanks for posting a positive comment for me.
aboonski 2 years ago
I'm pretty sure a 12V charger would be the way to go here. It still only takes an hour to charge up one of these bad boys. These batteries are great. I just now replaced two of these I've been using on a daily bases for ten years.
mrpowerchute 2 years ago
I am not charging the battery in this video; this is a battery pack by-pass (no cells in the battery pack). Ironically, Ryobi does sell a charger that plugs into the cigarette lighter - I bought one of them for my Ryobi tools. I am down to one Dewalt 18 volt battery now and it is starting to fail. With my "battery cheat" I will never need to buy another Dewalt battery again but will have to use a "cord" to power my 18 volt Dewalt tools from now on. Thanks for the comment!
aboonski 2 years ago
I just did this to my Skil 18v battery. Thanks for posting this vid, it helped me a lot. My batteries are about 3 years old and one only holds a charge for a few minutes and never fully recharges. I wasn't looking forward to buying new batteries and this works better for me at the moment. Take care man.
team39763 2 years ago
Thanks for the comment! This really works for me! $86.00 plus tax for a new 18 volt Dewalt battery is just too much money for a battery that does not last long.
aboonski 2 years ago
only a redneck would make something like that just buy enough batteries and you wont have to use ur truck. lmao
xADEAN4DIMEx 2 years ago
Thanks for the compliment - I AM a redneck accordig to my fiance. Dewalt batteries just cost too much and don't last. Aside from not being able to use my Dewalt cordless tools I figured this to be an alternative to letting them sit and rot. Thanks for posting the comment!
aboonski 2 years ago
lol man battery costs are ridiculous
xADEAN4DIMEx 2 years ago
Nothing worse than being in the middle of nowhere and having flat batteries, so i'll go flatten the car battery too. unless what you want to drill is in the engine bay I would use welding leads to handle the resistance, flat car battery and a burning car..
DBT073 2 years ago
I am still trying to figure out what you are saying here???
aboonski 2 years ago
These are great drills! I drilled directly into a main line with one of these, blew me across the room but I'm still here.
nookie077 2 years ago
lmfao
ramfackled420 2 years ago
i still laugh about it today too.
nookie077 2 years ago
well there cells
SubSticker 2 years ago
inside the battery is a bunch of d batteries... amazing
L337F0RC3 2 years ago
Not quite!!!!
aboonski 2 years ago
If you can find a cheap 12-18volt DC boost converter you can get full performance. I'm not sure but I think you'll need roughly 10-20amps so it might not be feasible.
x65535x 2 years ago
This whole thing just sounds pretty redneck to me. Having to rig everything out of crap that they have laying around in their yard.
Feif64 2 years ago
That's pretty funny because I AM a redneck! Why pay for things when you can obtain them for free? Most people who like this video enjoy knowing that materials don't cost a ton of money like the Dewalt batteries do. This is an "alternative" to buying expensive batteries.
aboonski 2 years ago
or the other way around it is to buy a car charger for 50 bucks you tool
ineedausernamesobad 2 years ago
If you are trying to use a 600-900 cold cranking amp battery, you are going to burn up the brushes on the dewalt tool prematurely. Also, you would need much larger size wires than this person is showing, to be able to use the tool efficiently more than 6 feet from the battery.
Come to think of it, whats the use of a " cordless tool" if you have to wire it to a battery ?. Seems pretty stupid!
feuille12347565 2 years ago
There were a couple of times where I was at a job site with no other power tools but my 18 volt Dewalt equipment and the batteries "died" before I could finish the task I started on. So far, no problems with any of my Dewalt tools and the power cord that I use works just fine. I think it is a 25 foot cord. By the time you consider the resistance in the 25 foot cord, the power at the end would be very close to 18 volts when using a 24 volt system like I have in my military trucks.
aboonski 2 years ago
Do you work for Dewalt by chance? Dewalt batteries are inferior and therefore should cost a lot less than the $86.00 they sell for in our area. My next "cheat" will be using an 18 volt Ryobi battery pack to power my Dewalt tools. Very simple to accomplish but also requires a power cord running from the Ryobi battery to the Dewalt tool. For a brief time, someone had an adapter for this but Dewalt intervened and the seller pulled the item. Watch the video about this (still there).
aboonski 2 years ago
I don't understand why if we have standard cell geometries, i.e. AA, AAA, C, D and we have standard mains power plugs, i.e. 110VAC we can't have standard tool battery connectors...
if this guy has a problem with powercords then you could attach a small sealed lead acid battery to your drill and charge that buy simply hooking it up in parallel to your car battery.
lampajoo 2 years ago
I didn't put the motorcycle battery in this video as another power source but yes that will work fine for the 12 volt Dewalt cordless tools; a little shy of what you need for the 18 volt Dewalt tools. I have alligator clips installed for my cheater wire already that can hook up to any wet cell car or motorcycle battery but I have found my 24 volt NATO plug on my military vehicles is the best source of power for the 18 volt Dewalt battery cheat so far. Thanks for the comment by the way!
aboonski 2 years ago
There is a flaw in your first statement, the fact that the battery "can" supply 900 amps doesn't mean that it will force that current through the motor. Google "ohms law"
Waddymsun 2 years ago
ohms law isn't all there is. The power transfer has to do with the internal resistance of the battery. I think nicad and lead-acid are comparable so there shouldn't be a problem, especially using 12v on a 18v motor.
lampajoo 2 years ago
how do you figure this deviates from ohms law? i was simply stating the fact that if he connected the battery capable of providing 900 amps that didn't mean that 900 amps "would" flow
Waddymsun 2 years ago
I'm with you on this feuille.
lol! I find it simply dumb to rig something that is perfect already. Well, if your battery died, you should have gotten 2 in the first place. I always have a spare battery with a charger to do project.
Moe7133 2 years ago
Well Moe7133, thanks for the comment. If Dewalt batteries were around $35.00 at Home Depot or Lowe's I would buy about ten of them. I bought a bunch of Ryobi 18 volt cordless tools plus their premium Lithium battery and a charger which plugs into the cigarette lighter in my car. Now I have to make up a "cheater" to use Ryobi batteries in my Dewalt tools which will make my videos, like this one, obsolete. At one time there was an adaptor commercially available but Dewalt forced its removal.
aboonski 2 years ago
yea ur right, did a bit of research.. the charger is at low amps so low power to the gun, it will work but no good for heavy work like drilling..
so your idea will be drawing big current from the car battery so be carefull to keep engine running when doing a lot of work with it..
samdeluxjones 2 years ago
Generally I do but at the same time that increases the voltage substantially where I pull the power from. With a really long extension cord this is not a problem because the length of the cord drops the voltage down when you are drawing power from it.
aboonski 2 years ago
if you hooked the drill up to the battery charger while it was plugged in, this should work also yes??
just to get some use, rather than dumping them..
samdeluxjones 2 years ago
I might try doing that with the special battery case that I made just to see the voltage the charger puts out. It is possible that the charger may not provide power due to the modifications that I made to the battery for this "cheat". Another thing that must be considered is the amperage draw from the tool that is being used which could damage or destroy the charger which probably only provides enough wattage to charge the batteries.
aboonski 2 years ago
You could use the 24 volts on that 18 volt drill also. Just clamp the neg to the first battery in series and the postive the the last battery in series.
blackbox34 3 years ago
I thought about that but was afraid the extra voltage might fry the cordless tools. I could very easily tie into the NATO plug on either of my military trucks to get the 24 volts; I even have and accessory female end to fit into the NATO outlets. I am so disgusted with the inferior quality of Dewalt rechargeable batteries that I am working on a "cheater" to use Ryobi 18 volt batteries which cost about half of the Dewalt units. Remember this, "A product is only as good as its cheapest part!"
aboonski 3 years ago