Streamlight ProTac 2AA-X USB, 550 Lumens, 2.25 Hour Runtime, Multi-Fuel, Black, Includes USB-C Rechargeable Battery Pack, USB Charging Cord, Nylon Holster 88135 The ProTac 2AA-X USB is a slim" tactical flashlight that uses a USB-C rechargeable battery pack. About the size of a marker" it conveniently fits in your pocket and produces 550 lumens with a 2.25hr runtime.