the chassis i am running is specifically designed to take triple a 5 cell pack i have 3 here 2 new and a used one that a fellow racer gave to me i beleive it is my system is just power hungry but i am running the same radio gear and servos in my nt1 and my gt with 5 cell 2/3aa but those are rated as 1600 packs and those don't have a issue