5000Mah 3S1P LiPo 11.1V 45C/90C battery by HK.
Spec.
Capacity: 5000mAh
Voltage: 3S1P / 3 Cell / 11.1V
Discharge: 45C Constant / 90C Burst
Weight: 455g (including wire, plug & case)
Dimensions: 155x51x31mm
Balance Plug: JST-XH
Discharge Plug: XT90