6.Does X5 3rd gen/X7MKII support quick charge?

The X5 3rd gen/X7MKII supports quick charge. It utilizes the charging control chip BQ25890 from TI, and supports some of the mainstream quick charge protocols such as BC1.2, MaxCharge, etc.
It's recommeded to use a DC 12V/1.5A or 9V/2A quick charger to charge the X5. But the normal DC 5V/2A charger will also work.

Also, for your reference, we have tested some of the quick chargers available on the market. Below are the quick chargers tested to be compatible with the X5 3rd gen.