I switched from six 6 volt batteries to 6 twelve volt deep cycles and now am running 72volts on my cart. Faster and funner than before with what seems like about a 10-15% drop in range. Gets hot if running less than full throttle but afraid the motor will come apart if I run it full tilt for too long!! Mine is an old resistor coil cart so your cart would probably require alot more work to up the voltage that much. Probably should stick with the 8 volt batts. Good luck!!