The simplest reason for charging more slowly than before may have nothing to do with the phone itself. Instead, you may have a bad power cord or adapter, or a weak power supply.
In the same case, Zifang also recommends the use of the original priority charger, and in most cases wireless charging will be slower.
USB cables often appear, especially in homes with multiple users and devices. These cables often fall, bend, stay in positions where the temperature varies greatly, and even step on them. So before anything else, replace the cable and see if you can fix the problem. Many people like to use ports on their computers to charge their mobile devices. This is not always the ideal solution, depending on the age of the computer and whether other ports on the computer are in use at the same time.
All else being equal, you should use a direct source to charge your phone. In other words: Use your phone's original charger whenever possible.
It is possible that your charging port has too much dust, or there are dirty things blocked, resulting in poor contact between the charger and the charging port, resulting in the loss of fast charging into slow charging. It is recommended that you clean the charging port.
There are many reasons for the slow charging of a mobile phone, the first is the fast charging of the mobile phone, she becomes slow charging, you directly open the charging agreement, in the motor agrees to fast charging in this way, charging should be faster, if not, is the charger data cable and mobile phone connection loose, you can change a new data cable, try again, should be able to quickly full charge.
Maybe the charger is going to break...