Description Spektrum 2000mAh Transmitter Battery: DX8, DX9 7.4V 2000mAh 2S Li-Ion Transmitter Battery Product Height: 0.75″ (19 mm) Battery Type: LiIon (3.3V per cell) Capacity: 2000mAh Battery Voltage: 7.4V Connector Type: White 2-Pin Product Length: 2.76″ (70 mm) Product Width: 1.42″ (36 mm) Cell Configuration: 2S1P Product Weight: 3.35 oz (95 g) Number of Cells: 2