This Mag-Lite flashlight uses four D-cell batteries and comes with a high-intensity Xenon gas lamp for optimum brilliance and extended range. Ideal for almost any outdoor situation--from camping in the woods to working on a car in the wee hours of the evening--this flashlight switches from spotlight to floodlight with a twist of the flashlight head. In addition, it offers anodized construction inside and out, resulting in improved corrosion resistance and durability, while the low-resistance circuitry allows the flashlight to use its batteries more efficiently. There's good reason so many police, security, medical, and fire professionals rely on Mag-Lite flashlights.