1, first eliminate the problem of the charger and data cable, you can replace the data cable or link the computer to charge.
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2, mobile phone battery charging is divided into two stages, constant current charging and constant voltage charging, at the beginning of constant current charging, charging current basically remains unchanged, when the battery voltage is close to the charging voltage, change to constant voltage charging, current gradient voltage changes little, when the charging current is reduced to about 1\/10 of the battery capacity, it is considered close to full, then change to trickle charging. In order to protect the overcharge of the battery, the battery power display of the mobile phone will be displayed according to the preset value. If the system software parameters of the mobile phone are incorrect, the display may be abnormal, or the battery voltage detection circuit of the mobile phone is faulty. If other detection software is installed, due to the different charging detection call data between the mobile phone system software and the mobile phone guard software during charging, the mobile phone guard software may display 90% when it is nearly fully charged or has been fully charged, which is a normal phenomenon.
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3, may be the problem of the phone itself, it is recommended to deal with after sale.