They dont charge at the rated capacity. 2nd pair I purchased, love these slippers. However, as I was putting them on, two of the rings just ripped. It isnt really uncomfortable but that much weight makes it feel a bit like you are wearing a helmet. Cant hear anyone on any game unless Im in a party Yo the speakers are Amazing! -Jaw Fatigue: Felt it within an hour. anywhere. With that, the waist trimmer doesnt dig into your skin, it lays flat all the way around. Omg are these comfortable.