This battery is designed exclusively for the New Turnigy 9XR radio system.The pack has both over charge / discharge protection and over current protection built right into the battery. this adds significant safety to the 9xr system.Spec:Capacity: 2200mAhVoltage: 11.1v Constant discharge: 1.5C Max charge rate: 1C Standard rate: 0.5c Charge cut off: 12.6vDischarge cut off: 9.0vOver current cut: 5 ampsBurst discharge: N/AWeight: 139gSize: 100x33x19mmPlugs: JST JST-XHNote: This battery is only to be used in Radio Transmitters