Lipo questions

[E-Revonut]

I went from 2s 6000mah MaxAmps(20C claimed discharge) to a Neu 5000mah 25C pack in my CRT.5 and the difference was day and night! With the MA pack it was fast but with just a battery change I was pulling wheelies going faster without a gearing change and will also pull the steepest gearing I have without heating up. C ratings do mean a lot!

[Metallover]

Originally Posted by E-Revonut

I went from 2s 6000mah MaxAmps(20C claimed discharge) to a Neu 5000mah 25C pack in my CRT.5 and the difference was day and night! With the MA pack it was fast but with just a battery change I was pulling wheelies going faster without a gearing change and will also pull the steepest gearing I have without heating up. C ratings do mean a lot!

The C rating wasn't the only thing that made it faster! Brand name and the cells they use make a big difference too.

[E-Revonut]

Originally Posted by Metallover

The C rating wasn't the only thing that made it faster! Brand name and the cells they use make a big difference too.

True but that still relates to C ratings. They must be accurate ratings and certain companies like MA like to inflate their ratings. Instead of marking them with a 12C rating that they most likely are. Higher C ratings will give more punch and cooler temps which help to extend the life of the cells

[lincpimp]

I see some good info in this thread and some not so good info...

A higher C rated pack will provide more punch as noted. Your current cells are around 12c, so you have close to 100amps cont available. That is pretty close to what your setup should draw. Very few 4s setups in heavier vehicle draw less than what a 100amps cont battery can provide. (I do understand that the average drw will be much less than 100amps, but factoring a fair number of accel spikes and understand that lipos have a "duty cycle" of sorts leads me to believe that most 4s setups need a 100amp rated lipo min)

Also, having a higher c rating will not necessarily lead to lower pack temps. The 30c enerland cells run hot.

A correctly sized pack is very important to building a good setup. Problem is that the retailers have the specs all over the place, so trial and error are the best bet to find good cells that are correctly rated.

[sikeston34m]

Originally Posted by E-Revonut

I went from 2s 6000mah MaxAmps(20C claimed discharge) to a Neu 5000mah 25C pack in my CRT.5 and the difference was day and night! With the MA pack it was fast but with just a battery change I was pulling wheelies going faster without a gearing change and will also pull the steepest gearing I have without heating up. C ratings do mean a lot!

If you only look at the C ratings of these two packs:

6000mah 20C = 120 amps continous discharge
5000mah 25C = 125 amps continous discharge

If both were rated accurately, the difference wouldn't be enough to really notice.

Perhaps one of these companies is making false claims. Hmmmm......

Building packs out of cheaper cells, inflating the ratings AND the pricing?