Problem Analysis：
There are various voltage specifications of the charger directly charged by Xiaomi mobile phone.
Theoretically, it can be used normally if the charger specifications are supported by the phone.
If you try to troubleshooting it can use other brand of the charger, but the daily charge or advice
when users try to use the original charger, if using the charger current and voltage too high may burn
the mainboard, if use the low voltage charger, mobile phone may detect in charge, if current is low,
can make the charging speed slower.