When the status bar of the phone shows that the earbuds battery is low (the phone needs to support the display of the earbuds battery), please put the earbuds into the charging case and close the cover. The copper pole of the earbud can be in contact with the charging case to charge the earbud. After about 60 minutes, the charging case will fully charge the earbuds. It is suggested that you use a 5V charger and the original charging cable for charging.
The fully charged charging case can provide an additional 2.5 cycles of charging for non-powered earbuds.
Note:
It is recommended to charge the earbuds and charging case in an environment of 15°C ~ 35°C. Charging time will be longer in other temperature environments.