per battery, and btw youll need a balancer, http://www.rc-monster.com/forum/showthread.php?t=6131 this may help, its a good setup, but you already have the ice right

but i charge @ 5 amps (1c)

and i got 35 min of bashin , had to be easy on the finger, i also ran hard and they dumped in like 10 min so its easy waste power

what controller are you thinin about? you may be better off with a 4s battery to power it up