- Battery - Full charge lasts around five to six hours. I purchased these several months back and held off on reviewing until a thorough wear had been done. My grandson thinks they are great and loves the design and ease to slip into. This towel bar is not very sturdy. The back brace assembly comes with these two stupid clips that are totally non-functional, so toss those out. I have hard-to-fit wide feet with pronation, a bone that protrudes below my ankle and bunions, so its amazing these not only fit but felt comfortable. These sound great and they isolate outside noise similar to how earplugs work. It ends up being a little wider and that feels great to my hands. The carry case is a cute touch, and the wire is cloth covered to help protect it. Smart Assistant button works pretty well.