1000mAh 20C 2S 7.4V LiPO Pack RC Battery 1000mAh Capacity 2S - 7.4V - 20C Discharge 73mm X 35mm X 11mm (2.87in X 1.38in X 0.42in) 53.8 grams (1.9oz) Comes with Align/E-Flite balancing taps (JST-XH)