Yes, but it isn't just the battery icon, its the information dialog too. I wasn't able to take a screenshot with the battery-icon popup, but here's the dialog box which is the same. Take a look.
** Attachment added: "screenshot" http://librarian.launchpad.net/4903047/Screenshot.png -- gnome-power-manager does not update often enough, only updates every 25% of battery charge https://launchpad.net/bugs/66025 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
