Coast LED Lenser LL7840 David 15 DigiTac I Black Luxeon LED flashlight uses just 1 AA battery LL7840 DigiTac I?Black LED flashlight,?Luxeon?White LED Prism Reflector System,?P.T.T. Circuit, 95.2 mW bright LED Light output High Quality Luxeon LED with Intense?1.25 Watt Beam 4.0 inch body length,?2.2 ounces incl.?Sheath and Lanyard Uses economical 1x AA?battery included, run time?12 hours