4 ms·
The Chromecast does not require external power; it'll run off the power supplied via the HDMI port. I'm pretty sure the Amazon FireTV Stick will, too. I don't o
by teach 12y ago
The Chromecast does not require external power; it'll run off the power supplied via the HDMI port. I'm pretty sure the Amazon FireTV Stick will, too. I don't own a Roku Stick, so I can't comment.
They prefer having external power because many HDMI ports don't supply enough consistently, but don't require it.
- skbohra123 12y agoI own Chromecast and it does require the USB cable for the device to turn on and work
- dubcanada 12y agoHDMI provides about 50mA minimum. USB can provide up to 500mA or 900mA depending on USB 2 or 3. I am not 100% sure what the power requirements for a Chromecast are, I'm 100% sure it is more then 50mA. If you are plugging in your Chromecast to your TV without the USB and it is working it's because you have a MHL-HDMI that provides up to 900mA of power.