Fenix Outfitters 420 Lumen UC Series,Rechrgable,Black Flashlight USB or AC Reachargeable with supplied AC charger and Rechargeable battery. Compatible with 18650 rechargeable battery or 2X CR123A Batteries Four Brightness Levels and Strobe Digitally regulated output maintains constant brightness, Low-Voltage warning and charging reminder Bundle includes two LegionArms CR123A Lithium backup batteries