14.8 volt - 3150mAh 8C Li-Poly - 4 cell Lithium Polymer 3150mAh battery pack. 8C continuous discharge rate not to exceed 25 amps. Top quality cells with moderate discharge rates. Maximum burst of 37.8 Amps for 5 seconds is ok for every 30 seconds. Maximum charge rate 3.15 Amps. Dimensions: 31mm x 50mm x 140mm Weight: 340 grams