First, there are many reasons for the slow charging of mobile phones, such as voltage instability, lithium batteries will automatically open the protective barrier to prevent frequent charging. Or the discharge process is confused with the charging process, the charger plug is different, the charging cable is not plugged in, and so on. In addition, the mismatch of the charging plug, the power of the plug is not enough, or the mismatched USB charging cable, due to the different support currents, will also lead to slow charging of the mobile phone, replace an original or certified charging head and data cable can be solved.
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Second, in addition, the battery APP software is intended to protect the mobile phone battery, but sometimes it will limit the current of the mobile phone charging, resulting in slow charging. The solution is to uninstall the battery APP software. There is an imperfect ROM system will lead to slow charging of the mobile phone, the solution is to re-brush the latest stable ROM system
It should be that the temperature of the phone is too high, causing the fast charge to become a slow charge. However, the problem of the mobile phone system will also cause the fast charge to slow down, after all, if the mobile phone system detects that the temperature is too high, it will automatically reduce the speed of the fast charge.