What should Xiaomi 9 do if the charging volume returns to 50% every time? Automatic reply.

In fact, I think there is something wrong with your battery, and it rushes to 50% every time, but not necessarily, he only has 50%. It is possible that he is 100%. Only 50% is displayed. It may also be the battery of the mobile phone. You can take it to the cell phone repair place to repair the battery. Or call the manufacturer and ask him to take it back for repair.