From what the nitro guys are saying they are very tough. They are using them to bash when they don't want to hurt there other trucks and they still don't break them.
Sorry, I meant to say I am using 4 6-cell stick packs. Bone stock Radioshack GP3300's with deans. Those batteries have just been sitting there for at least a year since I upgraded to higher powered brushless systems. I guess that is the price we pay for the new technologies that constantly come out.
Cen ME16 Sidewinder 5700
CRT.5 MM + 1509 1y
FLM Rustler MM & 7L
E-Maxx Hv maxx 6.5 + FLM E-Maxx
Stock E-Maxx for friends to bash
8ight-t 1515 1y in the works