There are two ways to look at it.
First, the charging treasure comes with a charging status display, with a fast charging symbol, such as the one I use.
The second is that the charging bank does not have a status display, but has a 2 amp output current interface, at this time if the phone can accept fast charge, it will display the fast charge symbol. You can look at the display of your charging bank or mobile phone to determine whether there is a fast charge.
Buy with the fast charging function, the charging treasure of Rome will turn blue when the indicator light is fast charging (the default is yellow), and the fast charging icon will be fast charging with the display screen