Why are my earbuds not charging?

1. Check if there is any dirt inside the charging pin of the earbuds and the pogo pin on the charging case.
2. Gently shake the charging case to ensure that the earbud charging pins and the pogo pins on the charging case make full contact, then check if charging works.
3. Place the earbuds in the charging case and connect to the charger for 10 minutes in a comfortable temperature environment (around 25℃) to see if it recovers.
4. Open the case, long-press the pair button for 10 seconds, wait until the indicator LED is on, and try again.