Z580 Battery Driver Problem [ Windows 8 ]

dsmarty

Journeyman
I bought lenovo Z580 in november 2012. It came with windows 7 Home Basic. I then upgraded it to Windows 8 pro under 699 upgrade offer. Windows 8 is faster, smoother but there is a problem with battery. Windows 7 used to show the battery time remaining but Windows 8 doesn't. :S
Like Battery : 30% ( 2 Hours Remaining )
This thing is no longer showing up after upgrading to windows 8. I tried googling but found nothing about this. If anyone know anything about this please help me.
 
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