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..