The first reason is that the charging box is broken, please try to charge in the new charging box; The second reason is that the battery of the earphones is broken, please take the AirPods to the Apple after-sales service center for repair.
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AirPods use tips: 1, take out or display charging status -AirPods from the charging box out of the display is still showing charging, which may be a display problem, wait a few seconds to return to normal. Alternatively, you can put the AirPods back in the charging case and then take them out and use them normally.