Coleman® 250-Meter LED Flashlight with BatteryGuard This technology also reduces the chance of damaging corrosion so batteries can be stored in the device for years (up to their inherent shelf life). Allows batteries to be stored in headlamp for years (up to their inherent shelf life) With Battery Guard, the batteries are automatically disengaged from the circuit when the headlamp is turned off to extend their life by as much as 25%. Rechargeable Torch Coleman LED Headlamp With BatteryGuard Technology, Water Head Torch Rechargeable Coleman BatteryGuard 200L Mini LED Lantern - BatteryLock™ technology... Fully adjustable head strap for comfortable wear Conventional headlamps experience residual power drain as long as batteries are connected to the circuit, even when the device is off. Solar & Outdoor Lighting | Light the Campsite 2 modes: high, low; up to 6 hours runtime on high; up to 200 hours runtime on low; 3 AAA batteries (included)