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: 4000mAhConfiguration: 2S1P / 7.4v / 2CellConstant Discharge: 40CPeak Discharge (10sec): 50CPack Weight: 259gPack Size: 152 x 49 x 16mmCharge Plug: JST-XHDischarge plug: 5,5mm Bullet connector.