I ruined one wireless headset by ripping out the usb socket from the PCB after tripping over the charging wire. After getting a replacement I put the "magsafe" micro USB connector in and not only is it trip safe now, charging is soo much easier since the cable can be oriented either way.

After that unexpected success I also outfittet my MX Anywhere and my Kindle with them and just throw a few in my laptop bag for use on the go or to share with other people.