ZeroHour Relic XR Compact Tactical Flashlight with Integrated USB Battery Backup Powerbank, 1,000 Lumen CREE XP-L LED, Rechargeable 3400mAh Battery USB rechargeable tactical flashlight with variable control ring Tail-cap switch, and waterproof battery backup all-in-one Uses one 18650 lithium-ion battery (included) CREE XP-L 1,000 Lumen LED Bike and Weapon Mountable