The Pro Tac HPL USB is a versatile tactical light that can charge from multiple sources and use three battery types; Stream light rechargeable lithium ion battery, two CR123A batteries, or commercially available Rechargeable Li Ion cells. This light will charge from a laptop or most USB wall chargers. Multi battery versatility means you can always use primary disposable cells to power the light when a charging source is not available. Designed for use in all markets, it features a tail cap switch for momentary or constant on operation, three different user selectable programs and a pocket clip for convenience. The aluminum housing with Type II Military Spec anodizing helps make the light extreme.