one
Low temperature battery, poor quality cable, poor quality USB interface will lead to mobile phone backcharging. Replace the wire.
two
The charging environment of the mobile phone needs to be above 10 degrees Celsius, to use the original charger to charge, do not use the USB interface of the computer to charge, because the USB2, 0 current is only 500 MA, if the USB interface and cable are inferior, the voltage and current are more not guaranteed, so there will be a situation of mobile phone anti-charging.
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1. Check whether the original charger is used. If not, please replace the original charger and try again.
2. Replace another power socket.
3. If the battery supports removal, reinstall the battery or replace it with another original battery and charge it again.
The reverse charge of the battery is discharge. If the battery voltage is within the allowed range, reverse charging is discharge, if the battery voltage is lower than the allowed voltage, it will overdischarge, causing damage to the battery, if the battery has no power, reverse charging will cause battery damage.