Tenergy 25C 11.1V 2200mAh Li-Polymer battery w/ EC3 Connector for E-Flite Blade 400 and ParkZone airplanes Best choose for 3D flyer of Trex 400/450 and other similar size helicopters 25C high discharge rate will give you the power you can never think of. Long lasting and powerful. Continuous Discharge Rate: 25C / 55A Burst Discharge Rate: 50C / 99A Dimension: 103.5x 34x 25.5mm