Fenix TK09 2016 900 Lumen Cree XP-L HI LED tactical tap switch flashlight with 2 X EdisonBright CR123A Lithium Batteries 900 lumen Utilizing Cree XP-L HI LED with a lifespan of 50,000 hours Uses one 18650 rechargeable Li-ion battery or two 3V CR123A Lithium batteries 130mm (Length) x 25.4mm (Body Diameter) x 34mm(Head Diameter) Tactical tail switch with momentary-on function of 900 lumens output Bundle includes Two EdisonBright CR123A lithium batteries