When looking at Different STBs I have noticed that they are DC 5V/2A powered...! Quick ?, If that is True, are the Power Cords (US, UK, EU etc) inter-changeable...? Meaning if One wants to Buy a STB and the Ad says US Cord is Out of Stock, can One use a US Cord from a Different STB...?!?

Doesn't the Plug Adapter make the Difference...?!?