Streamlight 88800 Polytac Flashlight with Xenon Bulb and Lithium Batteries, Black 6-Volt, high pressure xenon gas filled bi-pin bulb with 30 hour life Borofloat glass lens, o-ring sealed Tail cap push button provides one handed momentary or constant "on" 80 Minutes of continuous runtime to the 10-Percent output level Two (2) 3-Volt CR123A lithium batteries with a shelf life of 10-Year