We love this headlamp! Very bright and very good on battery life. The Black Diamond ReVolt is a powerful, versatile, rechargeable headlamp for climbing, hiking, camping or any other time you may find yourself out after dark. With 130 lumens of power, the ReVolt easily spots anchors while you rappel in the dark; proximity lighting gives you a large area of light for hiking down the trail; and a dimming feature lets you choose just the right amount of light for the task at hand. A three-level power meter keeps you from ever being surprised by dead batteries. PLUS the ReVolt can run on 3 standard AAA batteries or 3 rechargeable batteries… BOTH sets of batteries are are included.