About this item Capacity: 4000mAh 8C 7.4V, perfect for Spektrum DX9 DX8 DX7 DX6E DX6 transmitter. Professional Crazepony LiPo Battery, made by high quality Lithium Polymer raw materials , durable for long-lasting use. 4000mAh 2S lipo battery provide high quality, reliable power for your Transmitter . Parameter : Weight : 148.77g ; Dimension(LxWxH):71*50*19mm Package : 2pcs 2S 4000mAH 7.4V Lipo Battery with XT30 Plug. Product description Attention: Don't over-charge, or over-discharge batteries. Don't put it beside the high temperature condition. Don't throw it into fire. Don't throw it into water. Capacity : 4000mAh Continuous Discharge Rate : 8C Voltage : 7.4V Cell(s): 2S Configuration: 2S1P Dimension : 7.1*5.0*1.9cm Weight : about 148.77g/pcs Wire Gauge: AWG22 Package Including Craze.