I have used them daily for the last week and only charged once. 5 for sneakers and 9 in heels. It does also pick up back ground sound too but from my headphones its not much and can easily be removed. Music reproduction is very good but I have to select the album or playlist on the phone before setting off. Difficult to use, no one speaks English and nearlyImpossible to figure out how to use it properly, and I?m a pretty tech knowledgeable person. So If I find something else , this one will go back to amazon. Decidi no devolverlos porque estuvieron a buen precio y algun dia le quedaran. I didnt have to adjust due to discomfort throughout my workout like I had to with my old sports bras! Also, on the Bose there?s a button to toggle between 3 saved ANC presets from the app which leverages on the fly adaptation to your environment. Cost of the two together by the way is competitive with other racks where the mounts are included together with the rack.