Check out the top comment of this article: http://www.forbes.com/sites/jasonevangelho/2015/01/26/dell-xps-13-2015-laptop-review-now-if-it-only-ran-os-x/ http://

Check out the top comment of this article: http://www.forbes.com/sites/jasonevangelho/2015/01/26/dell-xps-13-2015-laptop-review-now-if-it-only-ran-os-x/ http://www.forbes.com/sites/jasonevangelho/2015/01/26/dell-x... A commenter pointed out to the author that Windows Indexing was responsible for significant battery drain and the author confirmed by running the test again with it disabled.