Powered by two DL123A lithium cells, it is small, ultralight and remains charged for up to 5 - 10 years between uses. The reliable solution for long-term solution when the need for flashlight is greatest. Perfect for emergency preparedness kits Waterproof to 500 feet. Power:2.1 watts; Lamp:HP Xenon Lamp; Burn Time: 3-4 hours; Battery: 2 DL123A Lithium cell; Size: 1.2 dia x 4.4”. Available in yellow or black housing.