1, the contact is not good, the general line is worn and worn.
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2, the charger cottage, the voltage is unstable.
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3, the mobile phone interface is worn out or the battery is not working.
solution
1, shutdown charging test.
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2. Replace the charging position and eliminate the intermittently caused by poor socket contact.
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3, if conditions allow to replace the standby charger for testing. Or send it to repair for testing.
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4. When charging, if the phone is equipped with third-party plug-ins such as charging doctor, it is recommended to uninstall and test.
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5, check the mobile phone charging interface whether there is foreign matter, such as liquid, there is debris resulting in poor contact between the mobile phone charging interface and the charger, if this situation is recommended to send for repair as soon as possible.
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6, back up the phone data (phone book, SMS, pictures, etc.), restore the phone to factory Settings (enter the phone Settings - reset - restore factory Settings).
Mainly look at voltage, current. The original charger output of this phone is: 5V\/4A, power: 20W. You look at the 25W charger is how much voltage and current, if the difference is not big, it should be able to use. Mainly support vooc3.0 flash charge, it can definitely be used.