ghoffman
70cc twin V2
The only battery I have puffed (besides the HK Nano Tech crap) was a LiFe when I tried to charge it at 5c! I really prefer the 8.4volts and on the 91 EF Extra, it needs the voltage. I am considering running 3S Lipo's with a Castle BEC Pro to regulate the voltage to 8.5 volts.