This battery is designed exclusively for the Turnigy 9XR radio system.

The pack has both overcharge / discharge protection and overcurrent protection built right into the battery, this adds significant safety to the 9xr system. 

Spec:
Capacity:  2200mAh
Voltage: 11.1V
Constant discharge: 1.5C
Charge cut off: 12.6V
Discharge cut off: 9.0V
Over current cut: 5A
Weight: 155g
Size: 98x31x30mm
Plugs: JST & JST-XH