Power supply confirmed as 5V micro USB | Raspberry Pi

Well not rasberry PI, but I had done the same with a chinesse NAS…: having a powered HUB and pulling the power from it to the NAS, here the trick was use one of those Y-USB cables provided on some 2.5 HD cases. one of ends has connections only on the power line, but not on the data, and that reduces any change of a horrible loop (Vcc goes to Vcc and ground to ground… so it keeps cool)