With my moderate use the recharging case keeps power for several weeks. Ces derniers coupent vraiment de l"extérieur alors que là cet effet nest produit que quand on écoute de la musique et pas individuellement. - USB-C charging connector. I choose this pair as well as 2 others to try with Prime Wardrobe. its quit working all together and theres nothing physically wrong with it. These shoes are perfect, they are so comfortable, just what I wanted as I am standing all day. I was so happy to receive the product and tried as i read good reviews but unfortunately it is not for me as it is makes my skin super dry. This makes it easy to find front when playing Ironman. Battery back up is not what they claim still pretty good. As I have an older laptop without bluetooth a dongle connection showed promise.