Power supply stopped giving time left

Hi there,
My power supply "thing" in the upper right corner of my screen stopped telling me how much time I have left when the powercord is in or out. It now simply says " not loading" and even when I put the powersupply on it will say the same thing while it is in fact loading. (I know since my notebook doensnt shut off then)
I had this problem a year ago and there was a trick for it to make it work normally again, anyone any ideas?
Its not the biggest problem, but it is really annoying not knowing how much time you've got left!
Thanks!
Dientje

You could control- clicking on the battery menulet in the upper right and try changing the display setting>show> ex percentage and change back.
You can try relaunching the menu extras in terminal,  copy and paste:
killall SystemUIServer
If that does not jump start,  it could be corrupt plist.  Try moving to the desktop or deleting the
com.apple.systemuiserver.plist  found here youruser/Library/Preferences/com.apple.systemuiserver.plist
followed by
killall SystemUIServer
this rebuilds the plist  and relaunches the menu extras

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