The high-performance Streamlight ProTac 2.0 Headlamp produces 2,000 lumens without sacrificing run time. Powered by the new SL-B50 battery pack that charges inside or outside of the light using a USB-C cord. The ProTac 2.0 Headlamp is a 2,000-lumen flashlight that uses a proprietary Streamlight SL-B50-protected Li-Ion rechargeable battery. The ProTac 2.0 Headlamp features three different user-selectable programs. The Streamlight SL-B50 charges directly via the USB-C port in the body of the battery. The battery is keyed to ensure proper alignment of the charging port. Packaged with a USB-C cord, rubber, and elastic head straps, and an SL-B50 battery.