lipo Batterys
 

Hi I am new to rc rock crawling and recently blown my lipo 7.4v 2300amp battery.

I am running a ezrun bushless esc and 32t motor in a Axial ax10 Scorpion.

Can someone please advise me on what battery to perchase next and please explain what the amps in the batteries do and what the volts do???

Call me stupid but I really do not know Please help:roll:

What killed your old battery? Did you run the voltage too low, or did you put too much draw on it and puff it?

I crossed the positive and negative wires

BLXJ 96
so what are the amps and what is the volts please explain??

2s lipos are 7.4 volts, the mAh is the how much voltage that battery will hold, kinda like a gas tank on a car. A 30 gallon tank will get you farther than a 15 gallon tank. A 3000mAh battery will last longer than a 1500mAh battery.

Think of it like a garden hose. Volts are you pressure and the amps are the flow/amount of water. The more volts you have the more you are gonna get out on the battery, and the more amps/MHA it has the longer it will last.

DioptricStraw
Thanks It was just what I was thinking.

So running a 7.4v 4000amp lipo sould be good for a ezrun esc with more run time than a 7.4v 3200amp YES? and what dose the 2s sand for? "dose it mean its a 2 cell lipo battery"?:oops:

Thanks mate, it was just what I was thinking the the bigger the battery the more the volt, and the more amps the longer the run time right ?

So running a 7.4v 5000 amp lipo sould be ok for a ezrun 1200kv crawler-35a esc YES?

the "S" value tells you how many cells in the lipo battery. Each cell has a nominal voltage of 3.7 volts. so, a 2S lipo will be 7.4 volts (nominal, at full charge it will hit 4.2 per cell, but lets just stick to the basics). The mAh value is amount of stored energy at the listed voltage. Just like the guys above said,,, the gas tank. A 5000 mAh battery will deliver 7.4 volts at an amp draw of 5 amps (which is 5000 mAh) for one hour. (mAh is milli amp hours). If you draw 10 amps the battery should last about 30 minutes, 20 amp draw and you will get 15 minutes out of it.
The "C" value of the lipo is a rating of how maximum, and fast the energy can be released without damage to the lipo. A 20C 5000mAh battery can deliver 100 amps max. its 20C times the Amp value of 5amps (5000 mAh). so 20x5= 100. This means if you had a large ESC and motor that might draw up to 100 amps on hard acceleration This battery could just supply enough juice.

On a crawler I would highly doubt you would ever draw more than 20 amps under an extreme bind situation.

My 1300 mAh 2S turnigy lipos last about 40 minutes so my average draw is about 2 amps. Im running a Novak Rooster crawler ESC and 55t combo. on my AX10 with 16/84 gearing.

If I were to draw 20 amps it would only last 3.5 minutes.

A little something I found in a search...

If you are wondering what the 2-6S in parenthesis means; it is a way the battery manufactures indicate how my cells hooked in series (S) the battery pack contains.

3.7 volt battery = 1 cell x 3.7 volts
7.4 volt battery = 2 cells x 3.7 volts (2S)
11.1 volt battery = 3 cells x 3.7 volts (3S)
14.8 volt battery = 4 cells x 3.7 volts (4S)
18.5 volt battery = 5 cells x 3.7 volts (5S)
22.2 volt battery = 6 cells x 3.7 volts (6S)I should point out you may run across packs or cells hooked up in parallel to increase the capacity. This is indicated by a number followed by a "P". Example: 3S2P would indicate 2, three celled series packs hooked up in parallel to double the capacity.


This is the web site if you wanna read more.............http://www.rchelicopterfun.com/rc-lipo-batteries.html

Wanna bet?

Uhm my puller has shot up to 90A momentarily under heavy loads (not only binds).