A123 Worlds Smallest VS. "Strongest" 12V Jumpstart battery

[dailypinoyshowbiz]

So where are the improper remarks are?

[gordoncraig410]

This video went viral on Castries

[maakjar]

Awesome!!!

[hippyraverocker]

Surely that cannot be good for the cells? Lead acids are built to give huge current short term to start the engine. I would have thought the combination of cracking the engine and then high charge current from the alternator would destroy them.

[Doctorbass]

@hippyraverocker

These kind of lithium cells can last for 2000cycles compare to lead acid ( 200 cycles) they can be cdischarged at 60C ( 140A) each cell and be charged at 4C ( 10A)

but since this pack is not built to stay connected to teh alternator, it does not really matter for the few second it is connected to it

[veryslyfox]

@Doctorbass That's not correct. Lithium batteries won't last 2000 charges if you drain them down below 11V like you're doing here. They only last 2000 charges if shallow-discharged. LA batteries will last 3000 cycles if discharged shallow. Think about it -- the typical car is started 500+ times per year, and the battery can easily last 5+ years in a moderate climate.

[MrDunkol]

Interesting video - I agree it is mathematically possible. Not sure I understand how it works without disconnecting the car battery first. Surely it would act as a sink & absorb the instant flow of amps. I'm asking because I had to jump start my Lexus last winter in -32C. Every time we disconnected the jumper cables the motor died as the battery sucked the current that the ECU needed. It took 20 mins before it would run without the jumber cables. Still using the same battery a year later though!

[imfree707]

Gotta' love the low internal resistance of those nicads!!!

[Doctorbass]

@imfree707 These are A123 Liithium Phosphate.. not Nicad

[imfree707]

@imfree707 Sorry, I stand corrected. The Lithium Phosphate battery has a very desirably low internal resistance!

[foxchemdry]

Does anyone realize that voltage alone cannot start a car engine--it takes AMPERAGE, which is something some little tiny battery will not have. It's kind of like the ratio of horsepower vs. torque--if you tried to tow 10,000 pounds with a Subaru WRX with 300 horsepower, you will go nowhere.........but if you hooked up a Chevy truck with only 275 horsepower, you will drive away with no problem because you have TORQUE. Voltage is your horsepower, amperage is your torque.

[Doctorbass]

@foxchemdry

Let me clarify your statement: It take BOTH voltage and current.. power is speed and torque.. power is current and voltage.. and this little tinny battery HAVE BOTH. 1100 of these cells actually do 7.8sec on 1/4 mile on a motorcycle.. and that'S POWER. My battery only have 4 cells but it's enough to start most engine 4 to 8 cylinder no problem.

horse power IS POWER... one hp is equal to 746 watts so power is not just torque.. it's BOTH TORQUE AND SPEED.

[foxchemdry]

@Doctorbass you're taking my statement out of context. The summary of what I am saying is that this tiny battery this guy is holding will NOT start a car by itself. It lacks the amperage needed to crank any gasoline engine. Otherwise, car makers would save all KINDS of space if they could get away with using such a tiny battery.

[Doctorbass]

@foxchemdry

This guy you are talking about is ME.. and i can ensure you that it start any 4 cylinder engine no problem. I also tried to disconnect the oem battery and to start the engine ONLY with the tiny battery and it work. Tis battery have a C rate of 60C at 2.3Ah wich is around 143A for 10 second.. but it deliver much more under heavier load like a starter.

Car maker dont want to spend $ on lithium battery to start ICE .. they preffer making an electric car with them as well

[Doctorbass]

@foxchemdry

This is another lithium battery starting an integra like me: youtube WkKRqaNPIBE

[Razza2250]

@foxchemdry bad analogy, horsepower is a measurement of work over a given time ie Power. Voltage is a measure of an electrical current's ability to overcome a resistance. Voltage * Current = Power.

Of you have horsepower, you can adjust gear ratios to give you torque at the wheels, the chevy truck has low gears, the WRX has much higher gear ratios. it sacrifices wheel torque for higher rotational velocity

[tkelly001]

@foxchemdry

The part that is being missed is that while they do have very low amp hour ratings, unlike lead acid, they have an extremely high C rating. they are designed so that energy flows extremely quickly through them without heating up.

A lead bat. may have 150 a/hr rating but a C of .5 so it can discharge 75 amps.

Li-ion may have 10 a/hr rating and a C of 12 so they can create 120 amps.

Difference is, they would be drained in seconds.

[mathios1]

@foxchemdry Don't mix up everything... Actualy Horsepower refer to Watts, not voltage. Voltage refer to torque and amps refer to speed. You can have as much torque as you want, if nothing moves you don't produce any power also you can have as much voltage as you want you don't produce any watt if you don't have any amps. If you need 200A at 12V to start your engine, this meen that you will need 100A at 24V. Your WRX will just need to rev at a higher speed to do the same work

[majorjam1]

@foxchemdry another fool! who does not know that horsepower and torque are the same ! look it up on google:)

horsepower is just torque multiplied by the rpm :)

[majorjam1]

@majorjam1 also these cells can produce huge current (amperage)

[The03r6special]

to all of the people complaining about leaving the radio on. your car cuts power to all components that are unnecessary for the vehicle to start. so it really doesnt matter. i just made one of these packs to power my motorcycle. hey doc, how do you go about with balancing the cells?

[marcexec]

@The03r6special I found that LiFePo4 doesn't run out of balance quickly, I'm using headways: google "Headway 38120 P cells as motorcycle SLI battery replacement"

[SuperVampSlayer]

Starting a car require high current, several hundreds amp current, that is why jumping cable and battery terminal are huge. You can put 8 AAA battery together in series to produce a 12v ( 8 x 1.5v), but it never has enough current to get the starter moving.

[Doctorbass]

@SuperVampSlayer Yeah.. but these are way better than AA cells!.. these areA123 lithium LiFePO4 with 120A burst for 10 second and over 250A pulse.. just ebough to start a car in these conditions..

[EETechs]

@Doctorbass You will have to forgive us Americans because our science knowledge sucks compared to France and we for some reason hate smart people. If you are smart then you are physically injured by the bone heads that have douche bag ego problems. I never had to worry because I always fought back. I have been expelled 3 times in high school long ago, for standing up to those bone heads. People in America are scared of being smart because of the abuse they must endure from their peers.

[marcexec]

@EETechs I believe drbass is Canadian but that doesn't make a difference to your statement of course.

[staticxmako]

@Doctorbass why not run this in your car becuase its less wieght than the lead acid? im planing on running JUST a123 cells in my race quad. would you see a problem with this

[usurper08]

whats your point? batterys are 12-24 v you can buy batterys thats size easily 9v you,ll still gets some amps out the car battery so why wouldnt it start? it wouldnt start? if it was completley flat it would never start

[Doctorbass]

@usurper08 The battery shown 8Volts... and .. at 8Volts an SLA battery WOULD NEVER start a 4 cylinder engine at that cold temperature. The battery i built have 13.2Volts nominal and can deliver alot of amp... the energy is not the same as a big 45 pounds 12V car battery for sure.. buty that's not the point here.. teh point is to have enough POWER to start it.. that battery HAVE enough power... and enough energy to start it more than 20 times

[Alabaster245]

Very Impressive..

[shaunlux]

TURN OFF YOUR RADIO !! any extra power draw will put strain on you car ect.

[Doctorbass]

@shaunlux The radio draw like 1 amp at 12V on idle... That lithium battery can give over 200amp burst... The radio is like 0.5% of power... You see the car can start with that booster WITH the radio.. so it dont really make a big diference!

Starting a 4 cylinder car require around 5000joules of energy to start... now the radio draw like 12watts.. and let say that i leave it turned ON during one minute... that's 720 joules..

The booster i have contain... ( 110 000 joules).. do the math...

[fergfergferg123]

wow it can start a small petrol , now try starting a diesel. 

[Doctorbass]

@fergfergferg123

Starting a diesel have been done already with these cells. But instead of starting it at -20, i tested that at 25 degree C outdoor temp

By doubling the cell number of this pack ( 8 instead of 4) ANY diesel or petrol engine can start

[wifebeater756]

did you make that pack or buy it please let me know

[harryfodder]

These batteries probably act more like capacitors. Sounds like you need to revive the car battery with the bedini circuit. I also believe the car starter to be highly inefficient and very wasteful. 12 volts @ high amps = terrible. The new 36 volt starters are better, but 100 volts DC would be an ideal range.

[fergfergferg123]

buy a diehard battery : problem solved

[ronmann606]

What would be more impressive is if you take the wires off your lead acid battery, connect them to the A123 battery pack you made and try to start your engine.

[nikwalnikwal]

good shit!! I want to make one of theese packs now.. would be good to have! I have the balancing charger already and that..

[pinoyfourlyf]

My lead acid car battery provides 590 cold cranking amps at 0 degrees F and around 800-900 amps at around 70 degrees F. But charge potential is much slower then A123. How much are these A123 cells? Why don't car makers use it to start regular cars? Hmmm.

[walkandlookup]

BTW where is the rule that a booster batt. ground goes straight to the engine NOT the battery?

[mst3kpimp]

so have you successfully started cars with just the a123 pack and nothing else or will this only serve as a "booster" for your existing battery which may be dying.

[joytech23]

molasses?

[mikemike23456]

I need that car radio if your intrested in sellinng that radio please e mail me at michael_hernandez23@yahoo.com

[rmstudio]

would be a lot better than the fudge packers gay club music playing annoyingly in the background..

[the26thhour]

Thanks for the upload.

Would these work as efficiently as a standard car battery in that, as far as I understand anyway, a car battery is being drained while at the same time charged by the alternator?

Thank you.

[Danielcolleges2]

can you show how you made this and tell how much it cost?



[brandon14872]

its not smoke its fog

[Alifzayaza]

C est vraiment pas mal j habite sur la rive sud de montreal c est sur que je vais me souvenir de ce ptit truc la ha ha

[hvguy]

cool video!, i used a 18v dewalt L-Ion battery to start my paseo, started up without a problem...

[TheCbradiopro]

Freakin about time a company expands on Li-ion battery technology.. We all can drive 500 plus miles (about the same as a gas tank) on just battery technology alone! Use filling stations the product electricity by advanced solar cells and wind turbine technology and our worlds energy problem is solved!

[ftpmarco]

nice, but you are lying about that "first time"

[LightningEVAustralia]

I think You are asking a bit much from those ANR26650M1 cells, what your doing in this vid are what manufacturers call "ABUSE".

If your car did not start immediatly than you would begin to exceed the batteries capabilities very quickly causing overheating of the cell and gaseous venting.

I run a 13.2v 9.2ah for my starter, which places the 250A load at 27C which is within the manufacturers specification.

[tamerursavas]

are you crazy do you wanna blow up your car

[sorryociffer]

-21C?!?! Damn... I hope you use a good synthetic oil.

[blazinloud]

@sorryociffer pff -21 is nothing......my old 1988 cavalier z24 started everyday not being plugged in at -40 to -50 same with my 98 blazer, they start in -40 like nothing.

[marcheseDS]

@blazinloud Where the Hell do you live? -50 Celsius? Do you have penguins in your backyard? :)

[blazinloud]

@marcheseDS canada, winter months are very cold

[Doppelgangergang]

What if I used these cells to repack my laptop battery? My stock 6-cell battery is crapping out, and it would be nice to have three of these in my laptop.

Would it work as a direct replacement to 3.7V Li-Ion cells? I'm aware of the lesser voltage...

[erehwyrevekool]

very interesting video! thanks!

[Einheitskreis]

That's what i call power :D

[JuanPapaNicolao]

that totally works ,, any 12volt battery will start a car

I once used a 12volt mikita cordless drill battery

and item your using puts out 12volts in DC form

[Doctorbass]

It's really not ANY 12V battery that can start a car. (BTW All battery are DC...)

It depend on the current capability of that battery.. Power is Voltage time current.. and to start a gas engine you need BOTH.

These cels can produce easy 120A during 10 second and near double during 2-3 sec... not a Makita cordless drill battery!.. The Makita LIthium are using the Sony Lithium manganese 18650V and VT) and they are capable of 30 or 40A max for the bigger pack ( BL1830)

[slcgh1]

It is a little bit tricky. you just use the small battery as a BOOSTER. may be other kind battery can do the same.

[Doctorbass]

no.. it's not a booster.. The Oem car battery is 11 years old and is pretty dead. it is more like a load than a battery.. so the pack i built is also putting some current to the dead battery and to the starter. I also tried to discunnect the OEM 12V battery ad the little pack work better WITHOUT the car 12V battery.

[coondogtheman1234]

Is this little rig you made is it rechargeable like can you use it again and again?

[Doctorbass]

@coondogtheman1234 ,

Yes it is RECHARGEABLE.. at this rate you can recahrge it around 200-300 times.. but normally with current under 20A you can recahrge it for 2000 times.

It's the best stable and powerfull LIthium cell generation.

[coondogtheman1234]

@Doctorbass

I wouldnt be surprised if they start using this tecnology in jumpstarters now, since litium cell batteries are much better than the older lead acid batteries. how many times can you charge a lead acid battery before it starts to deteriorate? maybe 500 times under normal use. is the current under 20A considered normal charging? how long does it take to charge at this rate?

[Doctorbass]

A Lead acid battery usually have 200-300 complete cycles. a lithium like mine is 2000cycles. Abot the 20A i meant under 20A discharge rate, you can do 2000cycles without loosing 20% of total capacity. The 2.3Ah cells inside can be charge at 10A that mean in 15 minutes they are FULL. but the cycle life is reduced a bit.. like 1000cycles

[coondogtheman1234]

@Doctorbass

that is still pretty good 1000 cycles of charging and discharging at 10A in 15 mins vs 300 cycles of a lead acid battery at normal charging rate. the lithium has about 3X more cycle life over the lead acid battery. They need to make Jumpstart boxes that use lithium batteries. you may have something going here. if the right company sees this video you may get rich off this idea. so keep this rig. this may replace lead acid batteries but it may be a bit more expensive.

[syvar]

I'm a fan of the K2 LiFePO4 batteries. You can purchase directly from their website. Because they make both a power version and an energy version, you have a choice as to more power or more energy.

[Doctorbass]

Yes these K2 qare great.. But i preffer the A123 for the same price! I actually have the K2 and they are heavier.. their energy density is lower and their measured DC internal resistance is around 25miliohm and the A123 are 10 miliohm... so for the same current the A123 produce less than half the heat! The A123 are now availlable at 5-7$ on ebay...

[syvar]

How long have you had your K2's. They changed some of their chemistry. On their 26650P rating is <9mOhm. You can short pulse that cell at up to 150A and continuous @ 42A. It's only a 2.6Ah but if you want power that's a great cell. Their 2660EV is rated at <19mOhm but is 3.2Ah.

[cristianoid]

...continiung

the diode rest , voltage to the adaptator exit and the batteries reach only  11.4 volts

11.4/3=3.8 absolutly right, if they were equilibrated in the begining!!!!!!

total amount

1_adaptator 10 euros =16 dollards

1 or 4 diodes 1 dollard

conectios

sorry my english im fron spain!!!!

[cristianoid]

good video Doctor, I use 3s1p for my rc brushless cars and the best way and cheap to charge 3a123 is

1_adaptator 220V-110V to 12.3v

12.3 because is tipical diode zener

and between the 3a123 and the charger, i put some diodes in parallel or one that admits 2-3-4 ampers (or so mani from 1 amper in parallel)

the circuit wol be:

adaptator altern current to 12.3 V

normal diode that admiit the amperage charging

the 3A123 batteries

continue.......

[wordreet]

Excellent! 5/5

Am I correct to say that these can be charged using the Li-Ion setting on a programable R/C model charger?

[Doctorbass]

Yes

[wordreet]

Thanx for the reply. Canada is cool.

Frozen actually! ;-)

[bonzo98789]

@wordreet

can be charged in Li-Ion mode, but only at ~2,3A and with reduced lifetime

[bonzo98789]

But everybody, do yourself a favour and buy a charger that stops charging when cells are full, its not that expensive and saving a few bucks is not worth killing the cells.

But, hey, the first test had to be done, and now its done !

And yes, it can be done with a car charger but no, it can not be recommended, only if you stay at place all the time and have an eye.

[bonzo98789]

All right dudes, i did it !

I tested charging my 2S A123 with my car lead acid charger in 6v mode.

It works, but you have to be very careful, because it dosnt stop loading when cells reach 3,7V/cell.

I took mine away from the charger when the charge current dropped to about 0,5 Amp.

That was too late, cells had 4,2 Volt at this point, so much too high.

When i stop charging while charge current is at about 1 Amp, than the cells are at about 3,6 to 3,7 Volts, so thats the ideal for them.

[SpikeThatGas]

dude your a freakin god! you just trumped PbA! if we got batteries this powerful now imagine what we will have in 10 years!

[iluvjoshua2007]

thats a pretty cool video, to be able to run your car on such a small but powerful battery! :)

[26highstreet]

may i suggest you dont leave the stereo on, it is using what little power you have in your battery and draining it

[bonzo98789]

Great Video man !

I love these cells and about 20 are on their way to me.

But i have a question:

Some comments before you said it won't be possible to charge them whith a lead acid charger.

I think it should work, because both battery types use CCCV (Constant Current, Constant Voltage) and a 4S A123 has 14,4V - 14,8V charge end voltage.

And a lead acid charger should be much better regulated than the light-machine VRM in a car, because not running 1000 to 7000 rpm :)

I will test and post ...

[offroadrc]

if the internal resistants from the batterie is much lower then the normal car batterie you will destroy your altenator cose it's taking to much amps.

[Doctorbass]

No. these cells have around 8-10miliohms. A 55Ah car battery have around 1miliohm per cells when brand new and 2-3 when old.

(per cell)

[Peajung1]

After the engine has run.

You must disconnect the A123 pack from the car.

The Alternator will charge A123 with very high Ampere, this should not be good to the A123 pack.

[Doctorbass]

I already usea shotky diode to protect.. but thanks for the advice!

[Peajung1]

Great Job...

I 'll make one pack for myself!!!!!

thank you ..

[yfzltr450]

iv got the same weather station, lol

[fly2000jtb]

are these batteries rechargeable batteries? where did you get them, not walmart or at your local store? they have some on ebay we just need to know if they are rechargeable/ some say they can be stored with little lose of power for 10 years? do you find this to be true? cool video rated very cool Joseph T (fly2000jtb)

[Doctorbass]

Yes they are rechargeable.. over 2000 cycle in normal conditions and 1000 cycles at 40A per cell

Yes they have minimal discharge over large period of time

[casemodder89]

could this batterypack work instead the normal lead acid 12 volt 6 Ah in a motorcycle ? (as replacement ! )

and what temps. can it handle ?

lead acid will not work proberly at temps like - 20 °C

how long will it last (i mean the lifespan) ?

thx for answering

PS. i saw these A123 batteries in electric modelcars (especially high Amp applications with huge Brushlessmotors)

[Doctorbass]

This battery have 2.3Ah so you would need to double it to get the same capacity ( same stored energy)

This battery can handle higher temp than lead acid. but like any lithium cells, temp reduce the life of that battery. A123 are the best for any parameters so temp can be as high as 100 celsius no prob.

at -20 this battery work ok, ( I started my car with it) A123 also are found in the famous fastest electric motorcycle The Killacycle!

[vwvr6]

J'ai pu voir que tu etais frenchy , dans quel pays tu es pour qu'il fasse si froid !!

Kler les A123 c'est top !

[Doctorbass]

Au Quebec !!  (Canada)

[phattacorider]

The extent of my battery knowledge goes just to simple positive and negative, lol...But this is just amazing! I really would have never though of connecting tiny batteries to a car battery to basically "jump start" your car. I'm astonished, seriously! Good job on the video!!!

[Doctorbass]

Since its not connexion between two car, it change absolutly nothing. current flow in serie.. so one positive or negative first make no difference.This is a complete independent battery pack,,,

in the situation of boosting a car with another, it is always better to connect the positive first for safety to avoid the second connection to short on the car frame.

[stro347ker]

So can i use a 12v SLA charger to charge my 12v LiFePo4 battery pack? Do they have to have BMS or not? PLEASE RESPOND.

[Doctorbass]

non you can't charge using the 12V SLA charger. The sla cahrgeur have not the current and voltage stabilization that is required for the lithium cells. Plus, this batteri have no BMS from now. I balance cells occcasionally with a seperate balancer from RC stuff.

[wurktwomuch]

Depends. My car's voltage regulator is 13.75 volts which is UNDER the peak charge of 14.4 volts of the A123 in 4S. So, as long as the cells are reasonably balanced, you won't overcharge them in the car. In addition, just parallel up a bunch of them to get 10+ amp hours and now you have a 4 pound car battery that'll last longer than the lifespan of your car.

[keyofdavid88]

Cool video! Can you replace your car battery with one of these? It would save some weight.

[abyssunderground]

No. Car batteries have a capacity of 40-70Ah. That battery was about 2.3Ah. No where near enough. Its purpose is to boost start, not provide power for your aux devices such as lights/fan etc.

[yadac123]

If these cells can deliver such high current then what wire guage should I use?

[yadac123]

Hi Doctorbass,

So you connected 4 26650 A123 cells in a series to get 13.2V. Under the A123 specs on these cells it can go 120A of current in a short burst. What's the wire gauge I should use?

[ichbingott4510]

Can you tell me the song name? I noticed the part of "Open Your mind" is from the alien guy in "Total Recal"

[hydroman242]

how do you know if it works if the car battery is helping it.

[abyssunderground]

The car battery was dead, it couldn't help! If the car battery is lower than the booster pack battery, then it can't provide any help. If they are equal then it can help. Think of it as pedaling your bicycle down a hill but you can't pedal fast enough. You don't actually help increase speed.

[helipassion]

at 1:30 You can see I have 10.6 volts and you can see I have a sweet radio! LOL! Seriously that was a GREAT demonstration of the A123. Nice! Thanks for showing another use for them! 5*

[robertssontheman]

How to charge these batteries?

[rfjgfude]

That was awesome. Don't worry about your English, I'm from the L.A. area and I understood you just fine. Thanks for the great video!

[undertake782]

Awesome video man. What's better, a LiPo or a A123?

[Doctorbass]

These little cells have a power vs density of 5000W and one single cell can hold 70Ampere continuous ! and 120A for 10sec... and you guess 230A for 2 or 3sec

and Even though they are lithium they can't catch in fire! or explode!..

They are SAFE... and that's why the 2010 Chevrelet Volt was interested to them!

4 time the life of a normal lithium cell !

[luc59457]

Yes, I know they are safe, there is so much forums and other informative website on them. I just hope they get cheaper. In other words, one day replace Lead Acid. SLA's and Gell. I am having trouble finding out if these are LifeP04's. Lithium iron Phosphate. So Places say they are, some places say they are a123? Are they the same just different names?

[Doctorbass]

A123 are the brand and are a kind of LiFePO4 cells... and LiFePO4 cells are a kind of Lithium ion cells.

Lithion ion exist in 4 popular category:

Lithium Manganese (LiMn)

they dont need bms

Lithium ion Cobalt (LiCo)

have the + Wh/kg, can catch fire

Lithium ion Ironphosphate (LiFePO4)

Safe battery, high cycles life, powerfull

Lithium Polymere (LiPo)

Best Wh/kg, can catch fire, powerfull

[luc59457]

Thanks

[GuruMN]

Wait, why don't they need a BMS, if you have one cell unbalanced and you charge it, it will go over voltage and unlike a lead or nickel based chemistry that can absorb some overcharge the lithium chemistry will have the voltage go through the roof. What prevents this with Lithium Manganese spinel cells?

[Doctorbass]

I use a balancer to charge it. But no BMS.. Dont forget .. this is not a replacement battery!.. this is a boost battery and fuly charged it can boost a normal car for around 5 times before the need to recharge and balance. I am keeping it under 3.7V per cell fully charged and simply avoid to overdischarge it. LiMn like the makita cells are just 10C and the A123 are 60C so LiFePO4 cells are better than LiMn for this application in high power density.

[GuruMN]

I was asking about the Konion cells from the Makita packs, you puts hundreds of them together to put on a bike, how do they not have problems with balancing? What makes them different so they don't need a BMS?

[Doctorbass]

The Konions dont really need BALANCING when they are matched, unlike other lithium chemoistry.. but they need LVC and HVC protection to avoid overcharging and overdiscahrging as well.

it's the way the interna resistance evoluate over the 0-100% charge and discharge... it stay pretty constant and that help keeping the energy pretty equal fro one cell to another and avoid thermal energy lost at the end of charge or discharge that create normally unbalance in other chemistry.

[luc59457]

I read that they are around 16$ per cell currently. On this site it also goes to mention other competitors of dewalt may come out and reduce to around 10$ per cell. Is your goal to go less than 10$ per cell. Even at 10$ makes a huge difference in total cost, great job!

[luc59457]

oh nevermind just saw it, that is really good weight vs output!

[luc59457]

Just curious as to how much these packs weigh.

[rudder11]

Very smart move my friend AAAA+++

[karmabike1911]

amazing power from small cells.

nice vid

[stonephonied]

could i get these cells out of a Dewalt Battery pack used for power tools?

[Doctorbass]

yes

[gdsierty12]

So you say it is safe to parallel A123 with lead acid?

[Doctorbass]

there is no problem. but these cells need sometimes to be balanced.. Lithium cells are like that.. they need to be equalized for every cells. it exist cell balancer for very cheap.

Mine need rarely cause i dont diacharge it fullly.

[gdsierty12]

One more question. I must also buy lithium charger if i would use this kind of batteries Lithium iron? Because when batteries stay dead, thats a nono.yes. Me would think lithium chargers are not cheap.

[gdsierty12]

I should just change battery to avoid boosting yes no?

[Doctorbass]

yes for sure!

[gdsierty12]

Thnx for adding the charging time to your video description. Important for people to know that

[gdsierty12]

If it could, please make sure to add in video descriptian thnx.

[gdsierty12]

Could they over charge your battery too since they are 70a cont??? thnx

[Doctorbass]

It depend on if you charge or discharge them.. their nominal voltage is 3.3V/cell and 3.6V fully charged wich is 14.4V for 4 serie cells.. that's the exact voltage of most of the alternator have. I would recommand you to take many info on the link posted at the end of this video... we are like 200 person to PERFECTLY know these cells at engineering level and to have tested, tested and tested them in many conditions!.. ebike community is growing and these cells are very wanted and promissing!

[gdsierty12]

endless sphere? Is that battery website? Me will check. Can these batteries overcharge the floodies? I am just wondering because my floody lead acid is going bad, too soon. I connect different battery too to boost them... But before I was using a gel to boost and never had this problem. Just shortly after when I use different battery to boost and then disconnect, it still starts but do not hold charge after car is off for awhile. So now I need boost almost every time =(

[gdsierty12]

You work at lithium iron factory?

[Doctorbass]

NO.. I just adopted these cells as my prefered cells for battery

[gdsierty12]

I Also read which most ppl don't do, better to disconnect b4 starting. Just what I read. Also wondering if your little battery die right after the boost no? My 5 minutes is good for me, since u can fit in glove compartment. I got mine for 25$. Works With 8 cyl. engine. But mine only 6.

[Doctorbass]

About the mixing.. these battery are Lithium and are not permanantly connected to them.. just for burst boost. so there is no problem.

their charge and discharge profile is one of the most similar to the SLA (lead acid) battery so paralleling them is ok. but NiMh or Ni-cad can not!.. you can not parallel any of these cells they can explode... A123 cells have no troubles with that. Like i said their internal resistance is very low and this is a great advnatage!

[gdsierty12]

I do not like mixing them, my battery lasts much less long because of this

[Doctorbass]

Gd,

What do you exactly mean by "mixing them"?

[gdsierty12]

Yes, I saw your whole video the other day. It goes to over 13v in cuple seconds. I was just wondering about the battery mixing, was told they usually don't recommend connecting 2 completely different batteries together, cause it afects it life, is true? I use different batteries to boost and my battery is almost no good. has trouble holding charge. could just be defective..

[gdsierty12]

Also I use the startmeup Patented charger. It good, very small and 5 minutes and your up en going

[Doctorbass]

The one i built dont need these 5 minutes!.. it's immediate. These battewrey are not nono.. but nAnophosphate... and there is nothing about mixing them..

[gdsierty12]

Best same batteries, or charger no?

[Doctorbass]

they can charge directly on the 12) car battery or with any voltage source up to 14.4V

[gdsierty12]

I was not talking about the lithium batteries, I was talking about the effect on the old generation floodies by mixing them.. Thats a nono. also me don't get your math. 3000cycles at 04A, then 1000cycles should be at 1.2A and 70A much less than 1000cycles, no? Big difference between 0.4A and 70A as you say...

[gdsierty12]

too much different not good for life

[Doctorbass]

Their life is 3000cycles at 0.4A, 1000cycles for 70A and 300-500cycles for 120A 10sec burst... will someone need 300 jumpstarts?

I dont think so..

[gdsierty12]

They even look just as small, no offence.

[Doctorbass]

No problem gd ! =) this is a fact that people that have not tested these cells can't imagine how they are powerfull!

The army use them in theyr 28V packs.. and they tested them with projectiles perforations... no problem .. no fire.. no toxic!.. they are also called SAFE battery!

see the rest of my video about these battery!

[gdsierty12]

Yes, me believe they safe batteries, but not mixing them no. Never recommend mixing batteries.

[gdsierty12]

This will cause people more problems when there is already safer alternatives for just as cheap already on the market

[Doctorbass]

Your 3w's(dot)startmeup2(dot)com is not comparative! How can you expect to boost a car by a cigarette lighter plug that is wired with 16 gauge wire and a 10A fuse!?

How much time soes it take at 10A to recharge a battery to be able to boost??

The A123 lithium battery are one of the most performant battery in the world and can deliver high current at -30 degree without any problem...

Please take some informations before posting comment about something you seems you dont know. =)

[gdsierty12]

They says under 5 minutes,which sounds really good for the price, it still a nono to mix bateres like that. Bad for the life of bateries. no? I read a lot of info that says that. even for temp.

[gdsierty12]

Sorry to bust your bubble but there is something even better than this on the market and is about just as small: 3w's(dot)startmeup2(dot)com. It is cheaper also. Although it is known to be a real no-no to mix batteries, it has already been done. Expect it to hurt the life of the batteries tho, even for a couple of minutes it is not recommended, but it has already been done for emergencies only. Already on the market. There are many just as cheap alternatives to this.

[Doctorbass]

gd......

This is not a question of bubbles, a market, a price or money!

If you had listened carefully this video, you would have seen that i'm showing how powerfull these cells are.. You seems to not knowing them.. at 70A continuous they have 1000 cycles and at 120A they have 300 cycles.. They are lithium ironphosphate of 5000W/kg.. see 3(w)A123systems dotcom.

[ww954]

THANK YOU. I'm a former Winnipeger now living in Florida. Its the sun and heat which kills our car batts every couple of years but with your little trick I'm sure I won't get stuck again. Thank you

[TheAlien8]

Combien coutent ces fameuses A123?

[Doctorbass]

Salut TheAlien8,  les cells coutent 10$ chacunes. Il y en a 4 dans ce boostpack.

En passant j'adore faire des ride a travers notre belle ville de Quebec en bike ou ebike Durant l'été surtout.. J'ai vu que tu t'adonnais aussi à ça donc laisse moi savoir si des rides t'intéressent!.. tu peux aussi voir quelques ride sur mes video!

[baker707]

tes vraiment bon mec, continue!

[Doctorbass]

Ya ! My Love is definitly a Genius !!! I'm so impress of all those discoveries and experiments he made each week. OK, I spend half of my nights alone, but, hummm , when I see that... that's worth it ! Congrats Stephane ;O)

[francis1959]

Completely amazing ! You're a genius, Steph !