EcoPower 5-Cell NiMH Stick Receiver Battery Pack (6.0V/1600mAh)Specifications:Chemistry: NiMHVoltage: 6.0 nominalNumber of Cells: 5Capacity: 1600mAhWeight: 120gDimensions: 32x84x17mmConnector Type: RxConfiguration: Side by Side FlatMax Charge Rate: 1C