How to Read a Li-po Battery CSRC

[d2dap636]

Thanx Dave, very helpful for the noob!

[arsenalprasa]

would 2200mah support esc

[RCSuperPowers]

Ha! Look at the Detail Police go crazy. I love it.

[1521joe]

hi

can i ask what would give longer runtine.

x1 5000mah 4s.....40c

or

x2 5000 mah 2s.......40c per battery

BIG THANKS

[zotter7]

i just bought a 3.7V 350mAh Lithium-ion polymer battery what do i charge it at, what amps, and what do i need to to know so it lasts long and safe

[stretch654]

Very, very helpful. This has answered many questions for me. Thanks.

[dalotel]

Where is the glow engine tuning video Dave? For the price of a li-po charger you can get your flight box and fuel ready for the season.

[ClassicFIHD]

@dalotel Not so sure about that anymore. Batteries, motors, ESCs have come way down, especially if you but the zippy batteries from china. I just bought a .60 size conversion from Grayson for about $90 for electric motor and ESC (non-BEC) and get my Zippy batteries from China for about $30. Not to mention over the last 2 years I have lost 2 planes due to nitro engine crap-outs.

[flyinportopotty]

the C rating works like this. a 60c battery will can use all power in 1/60th of an hour so 1 min at max. a 1C battery will run down at max in 1 hour (60 min). the C is the discharge rate. here are some quick ratios. 10c = 6 min. 15c= 4 min. 20c = 3min. 30c=2 min. 40c= 1.5 min. this is at Full power. to find the amperage you must divide the milliamps by the c rating. for example a 2000 mah 15c at full power will have 2000mah over 4 min which is 500 mah per minute at full power.

[ClassicFIHD]

@flyinportopotty Are you sure about this? If a 2000 mah 10C gives me 6 min and a 2000 mah 40C give me 1.5 min then why does the worst battery cost so much more?

[ClassicFIHD]

@flyinportopotty WRONG! "to find the amperage you must divide the milliamps by the c rating". You must MULTIPLY the milliamps by the C rating. So a 30C will last 3 times as long as a 10C.  You are totally backwards.

[DarkSkysify]

this video did realy help me and game me knowledge about rc batteries, what a great man

[albolooki]

Thanks for the info :)

[W01fman1487]

looking to buy a few lipos and they list an HV rating instead of a mAh rating. Are they interchangeable? I have read on one forum that they are but their reasoning didn't seem sound

[erikdravn]

OMG!!!! Thank you so much for laying this all out!!! I'm just getting into real RC stuff and my mind was swimming trying to grasp all these numbers and keeping them all straight! lol

[DmaProductions1]

so do u hav 2 use the same amp battery as ur motor and speed control or can u go higher

[999benhonda]

you should mention the amps that the battery can put out.

MAH ration times the C rating gives you amps it can put out. I.E. 1000mah x 10c will give you 10 amps(drop the last 3 zeros) a 3000mah x 10c gives you 30 amps.

[JesusLikesPork]

Extreeemeely helpful,, Thank You!!!!

I am looking for the maximum power output for my AEG (airsoft gun) and it cant handle an 11.1v lipo.

From your video I know exactly which 7.4v lipo to get now.. thanks again.

[famous1ondeck]

can you change the plugs on the battery and put it on a brushless rc car

[Coodude26]

If you know where to look, you can get a 70A ESC for $20 :D

[Quokka57]

So - you really need to start at the motor and work backwards - if you know your motor pulls 20Amps full throttle, you'll need an ESC of 20A *or more*. It always pays to go slightly higher with the ESC - just means its not right on its working limit. So, knowing the motor can pull 20A, we need a battery capable of sustaining that continuous rate e.g. a 1000mAh LiPo would need a 20C rating to supply 1A x 20C = 20 Amps. A 2000mAh LiPo would only need to be 10C or better to do the same job....

[Nile505]

it is a lipo. Its a cheaply made-over prices banana hobby art tech battery. Its 10c I figure they dont show it because its such a low rating. I cant find a motor that likes 7.4 V batteries. They all want 3cell-11.1V. The motor I have on it is actually mis-speced. Its not 970Kv but it is something more like 6800Kv. We put on a 1380Kv motor and could not get more than 50Watts out of it. It needs the properitary art tech motor to work at 80W

[Nile505]

My 1800mAh 7.4v art-tech bettery does not have a discharge rating. The motor that came with the 182 cessna I bought is a 970kv brushless. It says "Batteries-2cell Li-Po" It also says "Maximum sustained current (A)=15," but has a 20A speed controller I dont get the specs on this...

[scoobydawg04]

Hippy Dave

[8RR8R8]

Haha: "memememe" -GI Joe-the superbly done distortion nazi propaganda series?

is it ?

[estongt5]

it does a really big help

[nick2008bhs]

mAh = miliamp HOUR

[Quokka57]

There's a good Wiki called Lithium-ion_polymer_battery that explains this and other interesting info on LiPo batteries.

Hope this helps.

Q:)

[Quokka57]

To work out how long a fully charged battery will last, let's use our 1500mAh 20C Battery. We have 1500 milliAmp (1.5 Amp) Hours, capable of sustaining 1.5 x 20C Amps = 30 Amps conintuous draw without damaging the battery.

Convert our 1.5 Amp Hours to Amp Minutes - thats 60 mins x 1.5 Amps = 90 Amp-Minutes.? Hang a continuous 30 Amp draw our Motor is pulling when running flat-out on that battery, and you have 90 battery Amp-Minutes divided by 30 Motor Amps = 90/30 = 3 minutes run-time.

[matli1965]

Well, it explains it but, mAh are not just "Amps", its actually "milliampere-hour" (h = for hour) and tells the user how long a fully charged battery will last if continuously discharged. Correct is that as bigger the mAh value as longer the battery can be used but also more time to re-charge it is required. Very often manufacturers provide mAh values which are not correct (usually they claim more)

But I guess the important facts of this video are more or less correct.

[infernostr]

Very informative and easy to understand. Thank YOu

[blake7513]

thanks. that was thankful

[arsitama]

is a C rating has anything to do with esc? such as 25A esc can only use 20c batt?

[MikeysRC]

No, "C rating" and "25A" basically mean different things. The "C" rating tells you how quickly the battery can let go of it's energy. For example lets pretend that water is current........ a 5C battery would be like a garden hose where a 25C might be more like a big fire hose. Even if the voltage and mAh of the batteries are the same the 25C battery could get you wet a lot quicker....so to speak.

"A" rating of 25A stands for amps. This tells you how much current the ESC is able to handle.

[arsitama]

Because I read somewhere that someone says, if the ESC 25A, the battery should be 20C or less. So this person statement just confuse me.

[Quokka57]

No. The 'C' rating means how many milliamps the Battery can deliver in total - a 1500mAh (milli amp hour) 20C Battery can provide a continuous current of 1500 x 20 = 30,000 milli amps (30 Amps).

A 25A ESC, on the other hand, means that the ESC can handle up to 25 Amps of current.

If your Motor draws 30 Amps at full throttle, and your Battery can deliver this, you'll burn your ESC out.

Always go for an ESC rated 5 to 10 Amps above what the Motor will draw when running flat out.

[Nile505]

My battery ecs or motor all do not have c ratings how do I caculate this?

[Quokka57]

Are you SURE the battery is a LiPo? NiCads etc don't have a C rating.

The C rating tells you how much punch a LiPo battery can have at continuous discharge e.g. a 1000mAh 10C battery means it can supply 10 x 1000mA (which = 1 Amp) = 10 x 1 = 10Amp continuous. You can put a 10A, 20A, even a 50A ESC on it, so long as the motor doesn't call for more than 10A, or your battery is gonna cook. And you always charge a LiPo at NO MORE than 1C - so on a 1000mAh LiPo, 1x1000mA = 1000mA = 1 AMP *MAX*

[DougTeg]

3S means 3 cells in series. The 'S' is for 'series'. These days we are flying bigger planes requiring larger voltages and/or higher capacities. So we add the 'P' for number of batteries in parallel. So a 3S1P battery has 3 cells and is 11.1v. If you connect two of these batteries in parallel, you will have a 3S2P, still 11.1v, but double the capacity. 5S2P would have 18.5v and double the capacity of a 5S1P battery.

[bignitro50]

Will a 11.1 v chager thats ment for a 15c 1500mah battery work on a 12c 1800mah battery, the charger is a balance charger too.

[DanielTheManiel33]

the C doesnt have anything to do with how to charge the  batery, its all the mah, so yes if its ment for a 1500mah, than it will work for the 1800mah, it will just take longer.

[vu3muv]

You cannot combine a battery to double the voltage and current at the same time. Remember if you combine 2 batteries in series then you voltage will double, if you combine them in parallel then your current ( mah) will double.

Do not combine dissimilar batteries.

[bignitro50]

Will a 15c charger work on a 12c battery?

[pie68pie68pie]

i bought a alloy shark helicopter(not mini) and every time i try to fly it, it goes back words or sidways and i cant seem to go forward or backwards or turn using the remote.i read the instructions to it doesnt seem to work.

[canadianmaple09]

At 1:26 he says "reseVOR" in stead of "reseVOIR" (capitals used for emphasis) hahaha

[girrocks12345]

Your supposed to pronounce it like reserVOR. Haha

[badmanners411]

You're supposed to use "you're" not "your"

[checkup21]

Two important points:

1. mAh is "milliAmpereHours" not milliAmperes!

2. don't show a lithium-ion charger to use with Lipos. Lipos always must be balanced and can not be charged on LiIon-programs!

3. 3S1P means "3 cells in series, 1 pack in parallel"

[alex681219]

Hi, my belt cp comes with li-ion charger and lipo battery is that wrong?.

I have a Q is i connect the 11.1 lipo to charger in the 7.4 connection have current , can i charge a 7.4 batttery in that port? the charger works like transformer, can I connect my lama 7.4v to the charger and the charger to 11.1v lipo? TKS

[acalthu]

I agree! And he doesn't explain what the C rating actually means, and this value is very important these days, what with all the brushless monster trucks that are (going to be) hitting the scene this year.

[roflcopter105]

what does the trickle charge do?

[helpcentervideos]

its charges slow. soo wen the battery is already charger it wll keep it up at tthe same and not burn it out

[Skydive4ever]

Great job, thanks for the info

PS Great job on RCFlightCast

[batacat]

if you have a batery with over 2000 mAh it dosent mean that you are alowed to charge it over 2A, never charge a lipo any higher than

2A!!

[OghamTheBold]

Didn't know a Li-ion charger meant Li-po too

[GEO3535]

i said the same thing.?

[FeelThePunkBlast]

Nope. That's not a good idea. Use a 'LIPO" charger. Lithium ion is different than a lithium polymer

[raquer10101]

my battery seems over discharged and its a little puffy like squishy to the touch but not by sight can any 1 help me i realy want my skyrider in the air.

[RCSuperPowers]

Send me an email and we can get it figured out! - Dave

[duckpk10]

that means its ready to go NOW any more and it could explode

[moolikeacow2]

Question: If the 1250 mAh represents run time, how long does that translate to approximately in minutes? Thanks. This is an unbelievably informative video.

[RCSuperPowers]

Just like a gas engine, it depends on how big your motor is and how much you go full blast. Anywhere between 7-15 minutes. For me its about 10.

[moolikeacow2]

Awesome, thanks.

[JLynnJohnston]

Yessir.  Can I have the haircut called, "Normal," please?

[team222badbrad]

5 stars Dave!

Are you growing a mullet? :-?

You must be too busy to get a haircut as am I! LOL

[bedeone]

Wonderfull, this really adds to the safe usage of those dangerous li-poly batteries ;-)