3 cell Li-Polymer 500mAh battery pack.10C continuous discharge rate of 5amps with 7.5 amp bursts in accordance with our "Real Flight Rating" method.Maximum charge rate 0.5 Amps. With Align Balance Connector Dimensions 15.5mm x 26.5mm x 56mm Weight44 grams Please see our "Real Flight Rating" method that describes more specific use of"burst" discharge rates with our Li-Poly cells. Recommend to use Cell Shield for 2-6 Series connected packs or LiPo Shield for 1-12 series connected packs to prevent the packs from over discharge. A group of paralleled cells can be treated as one single cell.