Thanks for these links, sorry I couldn't comment before:
* http://makeuseof.com/tag/get-more-from-your-battery-with-jupiter-linux
This project was retired last month:
http://www.fewt.com/2012/12/an-important-announcement-about-jupiter.html
*
http://maketecheasier.com/fix-low-battery-power-and-overheating-issue-in-ubuntu-oneiric
This also refers to Jupiter and provides a workaround for a kernel that
shipped with trisquel 5.5 (arguably solved in trisquel 6 or using the latest
Linux libre from PPAs).
*
http://makeuseof.com/tag/20-ways-to-increase-the-life-of-your-laptops-battery
That's for Windows users, although some tips (mentioned elsewhere in this
thread, such as killing sound) apply.
I am summarizing information in this thread on the wiki, which I will share
soon.
