Check the charger and data cable for damage or looseness. If the charger or data cable is damaged or loose, it may cause a slow charging speed.
Make sure your phone is turned on.
If the phone is turned off, the charging speed may be slower.
Check if your phone is in power-saving mode. If the phone is in power-saving mode, the charging speed may be slower. Close applications running in the background.
If the phone is running a large number of applications in the background, it may cause the charging speed to slow down. Try using other chargers and cables.
If the charging speed is still slow after using other chargers and data cables, it may be the problem of the phone itself and needs to be sent for repair.
There are three main reasons: 1, the charger is wrong to use 2, the data line aging 3, the mobile phone battery damage can not be fast charged, three of which must have a problem, in order to achieve the purpose of fast charging, the charger, the data line, the mobile phone must support fast charging