The new number one in performance and price!
The new Turnigy Lipoly packs deliver full capacity at the said C rate.
You wont find a better deal in Lithium Polymer batteries anywhere!

Spec.
Minimum Capacity: 4000mAh
Configuration: 2S1P / 7.4v / 2Cell
Constant Discharge: 40C
Peak Discharge (10sec): 50C
Pack Weight: 259g
Pack Size: 152 x 49 x 16mm
Charge Plug: JST-XH
Discharge plug: 5,5mm Bullet connector