LP905857 4000mAh 3.7V Rechargeable LiPo Battery Batteries With PCM &  wires 50mm Model LP905857 4000mAh 3.7V Rechargeable LiPo Battery Batteries Type Rechargeable LiPo battery Capacity 4000mAh LiPo Battery Batteries Voltage 3.7V LiPo Battery Batteries Energy...