What about Parallel?

Hello,

Ok, my current dilemma has to do with runtime and battery size. Both of my trucks, the one I have (My E-CRT) and the one I will have soon (E-Revo) use TWO battery packs. Neither at present can fit the 6000mAh packs which are usually 165mm long. To date I've been using smaller packs and just waiting for someone to come up with a good alternative, then it hit me, what about using smaller capacity 4s packs and running them in parallel!

Neu makes a 4s 3200 pack. It's 25c so that gives up 80 amps, now what if I wired them in parallel rather than series like I do now with my 2s packs, that would give me one 4s 6400 pack with 160 amps!

Anything wrong with this idea? Best part is that the pack will fit inside the battery bays of the E-Revo...tell me what's wrong with this idea?

Thanks guys.