GT-LITE CREE LED 100 Lumen Tactical Flashlight with 3 Mode, water Resistant Lamp for Riding, Camping, Hiking, and Hunting+ Energizer 1 AA Uses Cree XP-R2 LED with a lifetime of 50,000 hours with 100 lumen power Total reflection lens delivers soft and bright flood light 1 AA alkaline energizer battery included full charge can last up to 3 hours