It doesn't add anything, a Mac is a pc, there is nothing special on it, it's related to something happening inside the browser, so for discovery sake he can post

I 100x increase my Mac battery by putting it to sleep.

This post is newbie in all senses. He could get a console over the webpage, check the javascript or offending logic and create a post like this:

Increase your users happiness (and battery life) by improving XYZ (e.g. polling behaviour) on your webpage. -Improving responsive design with battery life in mind

which identifies a problem and propose a solution.