Thanks for all the feedback, sounds like when they work they are great for the most part, but there has been a few failures. I'm personally a bit put-off by the idea you can't use just any USB C, my son has a SLONIK headlamp which is very similar but without the red light. The battery isn't quite as powerful but he's had it a few years with lots of heavy use and it takes any Micro USB which is the same as our Garmin's which is handy. You can also buy the upgraded batteries which is handy. I think I'll try the SLONIK or the SOFIRN and get a fresh start. PEAX agreed to just refund me. Would have a tough time trusting it on a long dark hunt after having it fail a day out of the box. I'm sure it's an anomaly but I'll try another.