4 cell Lithium Polymer 2100mAh battery pack. 15C continuous discharge rate of 31 amps with 42 amp bursts in accordance with our "Real Flight Rating" method. Please see our "Real Flight Rating" method that describes more specific use of "burst" discharge rates with our Li-Poly cells. This pack is ideal for the T-Rex helicopter. 32mm x 35mm x 100mm 229 grams

V2 packs in this model are shipping now!