Freway Ebike 36V Battery Pack The battery pack works as the power supply for your bike. It applies the innovative SOC battery tech to maximize the power usage. You will realize how powerful and long-lasting the battery pack is when cycling Battery Pack 36V/5.2Ah . Battery charger 42.4V 2A CC-CV not included. Weight 3.0lbs.Size 8.5X3.3X2.8 inch Bettery cells Samsung18650X20.