The Brila 580 Dual Power LED Headlamp features innovative hybrid battery technology to ensure you're never without a light on your adventures. The included rechargeable battery provides up to 18 hours of white light on a single charge. If you aren't near a USB port when you need more power, the Brila 580 is also compatible with standard alkaline batteries. No adapter or special chargers required. Easy-to-use focus control adjustment provides a long-distance spot beam or broad flood beam at up to 580 lumens on high.