I have been having a very similar problem. The percentage full reported by gnome-power-manager was around 6-7% while the time remaining would be at a reasonable 2-3 hours. I also noticed that "Energy when full" was reported at 643 Wh (with "Energy (design)" at 50.2 Wh).
I see a similar discrepancy in the DevkitPower.txt attached by the reporter: energy-full: 1357.04 Wh energy-full-design: 50.2 Wh I found this: http://ubuntuforums.org/showthread.php?t=736347 -- david_edmundson advises the following for a similar symptom: "It's a known hardware bug. Affects OS X too. The fix is listed on Apples website somewhere. Shutdown, take the battery out, and disconnect the mains. Then press and hold the power button for a while. Reassemble, and all will be good." I did this, and now the numbers reported by gnome-power-manager are reasonable. (energy-full at 51 Wh). What I quoted above states that this is a hardware bug, but I haven't gone any further to verify that. -- [karmic] Battery fill level is off; system shutting down early https://bugs.launchpad.net/bugs/485249 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs