I'm working on this too. I have the 4k Firestick, a NES Classic, and a SNES Classic. Everything I've read indicates that I should be able to power them via a powered usb hub (one plugged into a wall). As for plugging just the Firestick into the tv, there is a product out by Mission that allows you to do this ($20 on Amazon https://www.amazon.com/dp/B078KSHVCS). Hope this helps.