1. Replace the charger: If the charger fails, you can try to replace it with a new charger to see if it can solve the problem.
2. Clean the charging port: If the charging port is dirty, you can use a cotton swab or soft brush to clean the charging port, so as to ensure that the charger can fully contact the charging port when inserted.
3. Replace the battery: If the battery is aging, then you need to replace the battery with a new one to ensure the charging effect. However, if you are not familiar with battery replacement operations, it is best to ask a professional to help with the replacement.