Venom 8.4v 1600mAh 7 Cell Flat NiMH Battery for Airsoft  Tamiya - 2 Packs 9 minutes of firing time at 10A discharge power. High Capacity 1600mAh NiMH Battery for increased trigger response and rate of fire. 8.4V High Power Battery, 2/3A x 7 Cells. Mini Tamiya connector assembled with 16 AWG wire. Designed specifically for AEG airsoft guns with focus on power intensity and maximum run time.