I'm considering a warm weather garage charging/hanging station. I was used to keeping my White's detector in the truck, and just popping out the battery pack to bring inside for charging. Now I have to lug the whole machine and headphones in for charging. As long as it's not too cold, and we don't have garage thief problems around here, I wouldn't mind charging it in my unsecure garage.
I get 2 long hunts with no problem, but it goes "bf" on me during a third hunt. That's when I break out the USB power bank bar, with the extra magnetic charging cable. I have a zip tie loop under the arm cuff, where it tucks in. Works like a charm! Back detecting for hours with no issues.(except not waterproof) The headphones have always held their charge through the three long hunts.