This is one of the first rechargeable headlamps that can also run off regular AAA Alkaline batteries. Black Diamond made things easy by allowing you to charge your headlamp directly from any powered USB port like computers and solar chargers without the need for a charging dock. The ReVolt solved the biggest crux in rechargeable headlamps, that being the inability to bring spare batteries, by making the ReVolt compatible with any AAA Alkaline batteries. Grab your headlamp for your morning run and realize you forgot to charge it up? No problem, just pop in a few AAA batteries and you’re on your way. Clip in the Black Diamond rechargeable NiMH batteries when you get home to recharge for your next outdoor adventure. Regardless of whether you're using rechargeable or non-rechargeable batteries, the ReVolt lives up to the performance expectations of any Black Diamond equipment. 130 lumens of maximum output can cut through the darkest nights and a multitude of alternate light settings like dimming, strobing, and red night vision give you the flexibility you need to perform at your best in the dark outdoors while never using more battery power than you absolutely need.