I am using Ubuntu 12.04 with gnome shell. I have tried to remove battery icon from panel using the battery setting in system settings but to no avail. I use an extension called "system Monitor" which shows the battery properties but when I am removing the battery option in
/usr/share/gnome-shell/js/ui/panel.js the "system monitor" icon also disappearing.
So I tried "evil status" but to no avail, also tried
sudo apt-get remove idicator-power with out any result. The problem is it is appearing at the moment I plug-out the power connection & not disappearing when I again powering it up . Where am I making the mistake ?