Why can’t a power bank be used to charge the Xiaomi Smart Band 9 Active?
When charging with a power bank, the band cannot be fully charged. It is not recommended to use a power bank to charge the band.
For your reference, the reasons are as follows:
Because most of the mobile power supplies on the market have a function to automatically shut off charging when fully charged, the mobile power supply will automatically disconnect when the discharge current is small to a certain extent. When the band is charging, the current is very small, and the mobile power supply will mistakenly think that it is fully charged, thus disconnect the charging current of the band, which will cause the band to not be fully charged or cannot be charged.
Therefore, when using a power bank to charge the band, it cannot be charged or fully charged.
For your reference, the reasons are as follows:
Because most of the mobile power supplies on the market have a function to automatically shut off charging when fully charged, the mobile power supply will automatically disconnect when the discharge current is small to a certain extent. When the band is charging, the current is very small, and the mobile power supply will mistakenly think that it is fully charged, thus disconnect the charging current of the band, which will cause the band to not be fully charged or cannot be charged.
Therefore, when using a power bank to charge the band, it cannot be charged or fully charged.
Does it help?
Yes
No