A prime choice battery for the NextD Rave, and super cheap!

Specifications:
Minimum Capacity: 1800mAh
Configuration: 4S1P / 14.8v / 4Cell
Constant Discharge: 30C
Peak Discharge (10sec): 40C
Pack Weight: 209g
Pack Size: 107 x 34 x 25mm
Charge Plug: JST-XH
Discharge plug: 3.5mm Bullet-connector