Yes, this MiniX remains a China device, so expect them to save money somewhere!
Unfortunately, they did this on the unbalanced / unregulated power supply, which was supplied in the box.
This gives humming / buzzing while you move a mouse over composite video out.
No problems occur on HDMI so far. If you buy such a power supply, the buzzing is gone.
The good news is that you can buy an external off course, that I’ve already measured the tip.
The tip needs to be
Outside 3,1 mm (OD)
Inside 1,1 mm (ID)
I’m planning on buying this one, gives enough juice (2500 mAh) and has a replaceable tip.