Petzl reads minds
This thing rules! The fact that it uses a microUSB connection (same as my phone) was the icing on the cake. I was initially concerned about my headlamp sticking out from my head farther, but the difference turned out to be negligible. The only noticeable differences between the CORE and regular AAA batteries were how light the headlamp became and the longer battery life. The battery gauge is pretty great too! I definitely recommend this product to my coworkers and friends.