hey guys,


can anyone recommend a high discharge rate 7.2V batt that can compete with an 8.4V batt? and where could one get one online? and what mAh is considered normal discharge?

or should i just conform to the masses? []

thanks in advance!

e

No 6 cell is going to compete with a 7 cell if all things are equal. There are specific 6 cell that will compete with specific 7 cells if comparing high quality 6 with cheap 7 cells. Also using a higher speed motor may also make the 6 cell compete with the 7 cell.

High discharge? Lipo! Lipo's 7.4volt is unlike NiMH's 7.2volt because of it's high discharge rate without dropping the voltage.

I guess typical NiMH's "C" rating is 8~10, where Lipo's can be 8,10,12,15,20C or more!

Hmmm...because I saw another thread where a guy says he's going to be using a 40amp discharge 7.2V 4400mah...that sounds a little high, the highest I've been able to find for 7.2V is 30amp discharge rate, while most are between 10 and 20 amps.

I know that an 8.4V equal to equal will smoke a 7.2V but lets say that the local track only allows 7.2V....can anyone recommend any high discharge 7.2V?

Thanks in advance!

E

Use IB or EP brand cells from a good matcher with the highest numbers.

The rating you are looking at from the generic battery manufactureres is the max recommended rate and is usually 10C (it is pretty accurate too) the battery will do a good job and hold up ok. The rating from a reputable matcher is the rating at which the cells were tested and labeled. The good cells will hold up to far higher currents than the "matched" rating.

guver nailed it with the first reply. However you can find pretty high capacity NiMH cells (4500mAh) for a good price:

http://www.all-battery.com/index.asp...S&Category=182

I bash with their 3800mAh pack and the cells are actually in the 1.2 ~ 1.45v range. Fresh off the charger the 7.2v actually packs almost 9volt! Just don't charge it with high amp or the battery would be too hot and would need a cool down first.

There are other things you can do to lower a packs resistance and offer more punch:

high quality 12 gauge wire and connector for the battery
silver battery bars and a good soldering skill

But better yet, 7.4 volt 4800 mAh lipo with a balance charger...