If you can't charge your Xiaomi phone quickly after replacing its battery, there may be several reasons.
First, make sure you are using the original battery and that it is properly installed.
Second, check whether the charging cable and charger are working properly, and try to replace other charging devices for testing.
In addition, the phone software may be a problem, it is recommended to update the phone system or reset the phone Settings. If the problem still exists, it is recommended to contact Xiaomi customer service or professional maintenance personnel for further inspection and repair.
Then you should go to the business where you change the battery, explain that the quality of the battery is not good, and he should repair and replace a battery