The battery is a batterypack an 11,v / 12,6v
1200mah 13,32wh.
Its a battery pack that consists of 3 x 3,7v put together.
Located behind the grill, you have to unscrew it with four screw on the backside of the grill, but to get to two of the screw youll ned to dismante "legskirt" and the legs/servos from the hip. The battery is set up with a quickconnector and is really bad and 100%chinese.. mine wouldnt charge and the batterypack was even bloated! Straight out of the box! Shipping to my location is 500usd, so i decided to figure the $@$* out for my self..