The Streamlight strion C4 LED is the World's brightest ultra-compact rechargeable flashlight, Now a flashlight barely bigger than the Scorpion and almost twice as bright and rechargeable for heavy use. Strion's exclusive lithium Ion battery technology packs 8,800 candela and 160-Lumen into a compact 5-1/4-Inch package. That's almost as powerful as the no.1 rechargeable light for law enforcement, the stinger, in a body only two-thirds the size and less than half the weight. It's only 6-Inch long and weighs only 0.29-Pound. Strion C4 LED has a run time of 2 hours on high continuous with 7.5 Hours of continuous power when on low . The battery is lithium Ion, rechargeable a minimum of 300 times. The lens is Borofloat high temperature glass and will not melt over prolonged usage. The tail cap switch has constant or momentary on feature. The Streamlight strion is water resistant and made of aircraft aluminum with an anodized finish. Streamlight's most powerful re-chargeable for its size. If you use your flashlight a lot, this is the best. The beam shape is designed for a long throw with minimal sidespill. limited lifetime warranty.