Experience unparalleled power with the Streamlight 22111 SL-B50 Rechargeable Li-Ion Battery Pack, engineered for compatibility with ProTac 2.0 series lighting solutions. With a robust 4900mAh capacity and convenient USB-C charging, this battery is your reliable source for extended use and versatility in demanding settings. Compatible with ProTac 2.0, ProTac 2.0 Headlamp, and ProTac 2.0 Rail Mount 3.6V, 4900mAh capacity, rechargeable up to 500 times Rapid charging in just 6 hours via USB-C Includes charge indicator for real-time battery status Ensure peak performance with the SL-B50, the ultimate power solution for your Streamlight devices.