Airpods charge slowly in the charging bay, probably because the charging bay is also out of power. When the charging bay is low, it will no longer supply power to the headset itself. At this time, the charging bin should be provided with sufficient electricity. So he can attack the battery of the headset. If it is not a problem of insufficient power, it is recommended to return to the factory for maintenance to see if it is still in the warranty period.
In this case, the charging device should not be the original charger, so it affects the speed of charging, and it is recommended to replace the official original charger.