There are usually several reasons for this:
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1. The battery inside is old, or the battery is damaged for other reasons.
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2. The charging indicator light of the Bluetooth headset is broken.
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3. The earphone charging port or charging cable is in poor contact with the power port, the charging plug or power cable is not original, resulting in too large input voltage, and the battery has a protection board, which will automatically turn off the external power supply.
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4, the line damage or circuit failure in the production process of false welding, transportation after bumpy, resulting in opening welding can not be connected normally. If it really can not be investigated and can not be used, it is recommended to find the owner or after-sales treatment as soon as possible.