Bundle:Olight SR52UT Rechargeable Cree XP-L HI LED 1100 lumens 800 meters Waterproof flashlight+3*Olight 18650 3400 mAh Battery +3*Skyben 18650 Battery Case The SR52-UT is developed from the previous SR52 platform. The SR52-UT is an ideal solution for searching & rescue, law enforcement, and the outdoors. Heat sink body design allows more efficient heat dissipation. Powered by an 18650 battery featuring a protection board with a bulged battery positive end. Anti-scratch type III hard anodizing aluminum body.