You'll want to use a switched USB socket to stop the TV from turning on when the Chromecast is "pinged".
I just had a look at some motocross from Bellpuig in Spain on Eurosport.
Fast motion sport really shows up the slow frame rate. No, it's fine for charging a phone, but it might be a bit slower than the charger that came with your phone or tablet.
I have read that Chromecast works on a TV without the need for the TV to have a wifi connection. That is, does the TV need to be connected to the internet while watching Netflix etc or does the Chromecast do this without needing a TV internet connection?
I do have wifi for my mobile phone and tablet etc but not for my TV.
I imagine the first thing a casting app tries to do is "ping" all the Chromecasts on the network to see what is available.
If the Chromecast is "always on" (even when its TV is off), this probably triggers a response, which could be enough to turn on a TV with HDMI-CEC, and switch the input to the Chromecast.In our house we have two TV's (one in Lounge, one in Bedroom) and each has it's own Chromecast.The problem we are having is that if I cast a program to the lounge TV via the i Pad, the TV in the bedroom will automatically turn on by itself.The Chromecast power supply is rated at 850 m A output, and phone chargers are often 1,000 m A, while tablet chargers can be up to about 2,000 m A.You won't damage the phone or power supply if the original phone charger is 1,000 m A say, but it may take a bit longer to do a full charge. After a power cut today, once our home network was back up, we had a lot of trouble with wifi running very slow.Even apps with simple motions are OK as long as there is not too much screen refreshing going on. See ABC Iview used to work fine when casted to my chromecasts and now it runs like a piece of excrement on them.