for the following reasons
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1. The charger is broken or the socket is in poor contact.
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It may be that the use of the charger for a long time makes the charger socket loose and the poor contact results in the inability to charge the Bluetooth headset normally. I suggest you try a new charger.
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3, the Bluetooth headset battery is damaged, resulting in no charge. If the charger is good and the interface is not loose, it is necessary to consider that the battery is damaged.
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May be long-term use, resulting in battery aging, resulting in battery damage can not be charged normally, use.