If you can charge the headset, the battery of the box is bad and cannot be charged; If the earphone battery dies, the box's battery can be recharged; It's the battery. It's dead.
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Change a charging cable, change the computer USB port output electricity, jack plug contact is good, try not to solve it.
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A single charge gives you up to 5 hours of listening or 2 hours of talking on your AirPods.
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With multiple charges in the charging case, you can listen for more than 24 hours or talk for up to 11 hours.
one
May be the power adapter is damaged, can replace the power plug;
two
It may be that the metal contacts inside the charging box have stains, which can be cleaned up and used again.
three
The charging box may be damaged, you can contact after-sales maintenance.