Nio - FAQ - What to do if neither earbuds nor case are charging

When both the earbuds and the charging case have no battery left, you first need to charge the charging case alone to a certain level in order to prevent Sudio Nio from rebooting in a loop. If the earphones are rebooting in a loop, they will not longer function properly.

To charge the earphones correctly, please follow the steps below.

1. Remove the earbuds from the charging case.
2. Plug the charging cable into the charging case, and let it charge for at least 15 minutes.
3. Put the earphones back in the charging case, and let them charge.