XXX GNOME Documentation Project gnome-doc-list@gnome.org Why do I have less battery life than I did on Windows/Mac OS? GNOME Documentation Project

Explain reasons why the battery life in Linux (etc) could be shorter than on other OSes. Reasons might include inaccurate battery life estimates (see power-batteryestimate), misestimates on the other OS, or optimisations on the other OS that are missing in Linux.