If the charging case of the Xiaomi OpenWear Stereo Pro cannot charge the earbuds, please refer to the following steps:
1. Ensure that the charging case itself has sufficient battery. If the case is out of power, charge the case first before attempting to charge the earbuds.
2. Make sure the earbuds are placed correctly and that the metal contacts on the earbuds align properly with the charging pins in the case. Ensure the earbuds are secure and stable. Clean the metal contacts on both the earbuds and the charging case to remove any dust, oil, or oxidation that can obstruct charging.
3. Press and hold the button on the charging case to reset the earbuds, then place them back into the case and attempt charging again.
4. If the earbuds still do not charge after completing the above steps, contact the customer service for repair or replacement.