This Ethernet Adapter w/ USB Hub for the Fire TV 3 and Fire TV Stick 2 is cheaper and better than 's official adapter
Can you connect an Fire Stick directly to your cable box without using a smart TV as middleman? - Quora
New Fire TV Stick 4K Max Review - Read This Before You Buy
This bundle contains Fire TV Stick 4K Max and Mission USB Power Cable. The USB power cable eliminates the need to find an AC outlet near your TV by
Fire TV Stick 4K Max with USB Power Cable (eliminates the need for AC adapter)
Why you should never power a Fire TV Stick from your TV's USB port
Can you connect an Fire Stick directly to your cable box without using a smart TV as middleman? - Quora
Oassuose USB Power Cable Adapter for Fire TV Stick,Powers Streaming TV Sticks Directly from TV USB Port(Eliminates AC Adapter and Very Long Power Cable) : Electronics
AVOID HASSLE - Eliminates the need to find an AC outlet near your TV by powering Fire TV Stick directly from your TV's USB port. ADVANCED
Made for , USB Power Cable (Eliminates the Need for AC Adapter)
Physical Overview and Comparison of the Fire TV Stick 4K and new Alexa Voice Remote