First, the cause of the failure:
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1, mobile phone charging interface into the ash contact is poor.
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2, the phone charging port is broken.
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3. The USB cable is broken.
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4. The connector of the charger is broken.
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5. There is a problem with the plugboard.
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6. Cell phone battery failure.
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7. Some models of mobile phones have over-electric protection, which may exhaust the battery and need to be reactivated.
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8. There is a problem with the mobile phone motherboard.