They hold their charge without sounding staticky even when the battery runs down. I did not like this at first but having figured it out now, its fine. If you get an itch in an ear and scratch it, if you are adjusting the buds to find the best way to sit them into your ears, you can have a fast patter of hearing the Asian woman?s voice telling you over and over ?power on! But when set up correctly, it even hold my 185lb body. I decided to go to YouTube for some Bass test beats. Washes well, she washed them in the machine and hung to dry. Great shoe and very nice looking shoe. Sony the 950N1s top them overall. I LOVE these heels! Can?t speak to the sound quality as they never reached each ear!