This is the Dualsky 1300mah 4S 14.8v 50C HED Lipo Battery - XT60.

The new Dualsky HED series LiPO batteries are a high-performance TRUE 50C discharge, 5C charge pack. They are extremely durable being constructed from Japanese core materials. Offering outstanding performance true to their rating, lightweight and at an attractive price.

Capacity: 1250 mAh
Voltage: 14.8
Energy: 18.5 Wh
Number of Cells: 4S1P
Dimensions (L x W x T): 107 x 35 x 19mm
Weight: 142g
Wiring & Connector: 14AWG (XT60)
Max Charge: 5C
Max Charge Current: 6.3A
Max Con. Discharge: 50C
Max Con. Current: 63A
Max Cruise Power: 263W