is always Lipo 6750mAh 4S - 14.8V 55C constant 110C 5mm Bullets (Si-Graphene) Design for anyone 10 min long primary. The hardcase battery power weighs about 534g. more or less 2 light weigh LCG pack battery pack. Ideal for outside 1/8th scale rushing. Completely new bullets connector make wiring more pro. Design to attempt high KV rating motor.