[ubuntu] Battery Critically Low -> shutdown

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http://ubuntuforums.org – I just upgraded to Karmic Koala (beta) and noticed a bug - my laptop battery (HP Pavillion zt3000) has decent battery lasts me about ~1 hour regularly. But ever since I upgraded to Koala When I disconnect the power it displays that I have estimated power of about 1:32 minutes but almost within 30 seconds it displays a LAPTOP BATTERY CRITICALLY LOW and following which enters the laptop into sleep/hibernation mode its very irritating as I cannot move the laptop for the fear of going into a forced shutdown. I did recalibrate the battery from BIOS but it made no difference, Any help will be appreciated / or shold it be a bug report (Hardware)