While the battery is charging, the battery indicator glows amber. When the battery is fully charged, the indicator glows green.
To charge your headphones:
Plug the small end of the USB cable into the micro-USB connector on the headphones' right earcup
Plug the other end into a USB wall charger or computer that is powered on
Allow up to three hours to fully charge the battery. A full charge will power the headphones for up to 15 hours. A 15-minute partial charge will power the headphones for 2 hours
Note: The headphones will not play while charging.