A battery pack adapter and method for mounting battery pack to a weapon are provided. The battery pack adapter is detachable coupled to a powered rail system of a weapon such as a rifle or other firearm, the battery pack adapter for powering one or more we...

In one aspect, a battery pack adapter (180) comprises a first side configured for coupling to a helmet accessory control unit and a second side opposite the first side configured for detachably coupling to a battery pack (132). The first side comprises fir...