The Chrome team has improved a lot chrome, especially considering the Chromebook laptops and, at least in this case.
It was made a test with a full HD video to YouTube, using a pc with windows 7 the battery was lasting a 25% increase.
On Chrome has recently enabled GPU acceleration for video on Windows, it consumes much less CPU resources of the classic, this means significant savings for the PC in terms of resources and thus the battery.
In the new version of Chrome will be easier to understand resources and permits were required or requires the web site, simply by clicking on the icon in the upper left corner at the url bar.
In a pull-down menu we will see all the permits and cookies used.
Another step forward for Chrome.