Venom 10C 2S 850mAh 6.6V LiFe TX/RX Transmitter and Receiver Battery 4 Packs Fits these Joysways RC Boat and Sailboat Models: Dragon Force, Explorer, Focus, Force2 60, Orion. Battery Type: Lithium Iron (LiFe) Battery Capacity: 850mAh C Rate and Maximum Continuous Discharge (Amps): 10C (8.5A) Battery Volts: 6.6V