This is the Tenergy 900mAh 7.4V 25C LiPo Battery Pack with JST connector for the Blade 200 QX Quadcopter, E-Flite Blade CX, CX2, and CX3 helicopters. This is the perfect replacement for any aircraft using the E-Flite EFLB8002SJ or EFLB8002SJ30 battery packs.The Tenergy 900mAh 25C battery upgrade for the Blade 200QX and Blade CX helicopters offers:A gain of 12% more flight time over stock batteryPerfect fit in the stock battery tray and works with the stock chargerThis Tenergy Lithium polymer battery is rated at 900mAh 25C and is made for the Blade CX, CX2, CX3, and Blade 200 QX quad, while the stock battery is rated at 800mAh. It means this Tenergy battery will provide much longer runtime. This battery will work with the stock charger and fits inside the helicopters without any modifications - direct replacement but a better battery. Great quality and an exceptional value!Features and Benefits:Continuous Discharge Rate: 25C / 22ABurst Discharge Rate: 50C / 45ADischarge (Output) Leads: 20 AWG silicon wire, 97 mm long, JST(BEC) connector (Same as the factory pack)Charging (Balancing) Lead: JST(Align, E-flight) Style 3-pin connector. 24AWG PVC wire, 38 mm Long (Same as the factory pack)Dimension: 72x 24.5 x 12.5 mmWeight: 43g / 1.6oz