The Valken NiMh 8.4v 1600mAh Stick Type airsoft battery is made from high performance 1.2v cells. This NiMh battery has a slimmer design making it easier to fit into cramped battery compartments. The Nickel Metal Hydride battery is also easy to charge, and does not require discharging like NiCd battery packs. They have a long recharge life cycle, and consistent, reliable power output. They are built with 16AWG wiring and include a mini Tamiya connector. We recommend our Valken 8.4v-12v NiMh Fast airsoft battery charger to charge this NiMh battery.