The Mammoth Multi Light is a versatile, rugged, and multifunctional workhorse that‰۪s perfect for all the grease monkeys and outdoorsmen out there. It‰۪s water resistant and the LED shines incredibly bright at 400 lumens. The 4400 mAh lithium-ion battery can provide up 35 hours of light as a 150-lumen flashlight and up to 18 hours as an area light on one full charge (that same battery holds a charge for 7 years, so don‰۪t worry about putting it on the shelf). You can also charge your mobile devices with the USB port.