This may be due to the fact that we do not charge normally, or it may be that the charging box is out of power, of course, if there is a fault damage will also lead to failure to charge.
Method 1:
1, it is possible that the charging case is out of power.
2. It is recommended to charge the charging box separately first.
3. After it is full, put in the earphones to charge the earphones
Method 2:
1. Dust in the earphone or charging box may also lead to failure to charge.
2. Try to wipe the inside of the headset and charging case with tissue or glasses cloth.
Method 3:
1, if the above two methods do not work, it may be bad.
2, if conditions, see if other airpods can be charged to confirm whether the charging box is damaged or the earphones are damaged.
3, if you can not confirm, you can also go to the Apple repair shop directly to find a solution.