Coast LED Lenser LL7848 David 19 DigiTac II Silver Luxeon LED flashlight uses just 1 AA battery LL7848 DigiTac II Silver LED flashlight,LuxeonWhite LED Prism Reflector System,P.T.T. Circuit, 95.2 mW bright LED Light output High Quality Luxeon LED with Intense1.25 Watt Beam 4.0 inch body length,2.2 ounces incl.Sheath and Lanyard Uses economical 1x AAbattery included, run time12 hours