(Be so only during wallpapers displayed) The stick used in standby mode 1:25 W. In operation I have about 2 W measured at Youtube streaming, which have varied little: small cattle also makes crap. One should therefore best operated the Chromecast a USB port on the TV, then the Chromecast out is when the TV is not running. Otherwise one has such a small Stromverbaucher in the household, the electricity consumed without doing anything.
Other than that I like the stick very well and I am curious what all will be possible even in the future it.