The consensus in the support forums seems to be that it's about 3-5 hours: http://ubuntuforums.org/showthread.php?t=1334489 http://ubuntuforums.org/showthread.

The consensus in the support forums seems to be that it's about 3-5 hours: http://ubuntuforums.org/showthread.php?t=1334489 http://ubuntuforums.org/showthread.php?t=1334489 http://ubuntuforums.org/showthread.php?t=1514754 http://ubuntuforums.org/showthread.php?t=1514754 There are forum posts with people reporting two hours or less, but these may have a defective battery (a company rep offered to replace it): http://ubuntuforums.org/showthread.php?t=1379644 http://ubuntuforums.org/showthread.php?t=1379644