Nitecore HC50 565 Lumens CREE XM-L2 LED headlamp with Genuine Nitecore NL186 18650 2600mAh Li-ion rechargeable battery and Two EdisonBright CR123A Lithium Batteries Purpose-designed for hiking, climbing, camping and general outdoor recreation Powered by a single 18650 lithium-ion battery for up to 565 lumens of output High-efficiency circuit provides up to 400 hours of runtime A custom catoptrics-based system produces an extremely wide 100 beam angle Bundle includes, Nitecore NL186 rechargeable 2600mAh 18650 battery and two EdisonBright CR123A Lithium batteries.