You can try the following steps to troubleshoot the issue:
- Clean the Charging Contacts: Use a soft, lint-free cloth to clean the charging contacts on both the AirPods and the charging case. Make sure there is no debris or dirt obstructing the charging process.
- Check the Charging Cable and Port: Ensure that the charging cable you're using is in good condition and properly connected to a working USB port or power adapter. Try using a different cable or port to eliminate any potential issues.
- Reset the AirPods: Put your AirPods in the charging case and close the lid. Press and hold the setup button on the back of the case until the status light starts flashing amber. After resetting, open the lid near your iPhone or other Apple device to reconnect the AirPods.
- Try Charging with Another Case: If possible, try using your problematic AirPod with another compatible charging case. This will help determine if the issue lies with the earbud itself or the charging case.
If none of the above steps resolve the issue, contact Apple Support or visit an Apple Store for further assistance.
Additional information: Charge your AirPods and learn about battery life - Apple Support