1, the charger and the micro-socket connection contact is poor.
Replace the tail insert. If no, replace the component.
2, the charging line is not very good, change a line, change the line is good.
3, do not charge in a place that is too cold below 5 degrees.
It is recommended to pay attention to the following aspects:
1, the use of good quality, or special charging cable.
2, try not to operate the phone while charging.
3. When charging the mobile power supply, try to fill it all at once.