actually i already did what you suggested the battery has no built in gague on the surface actually.
Is it a DELL battery? DELL business class (Vostro) batteries have gauges. If it is, it will have a gauge similar to that of this battery
. If it isn't, no wonder it is acting up.
This really doesn't smell like an OS problem - install Dell ControlPoint and the Chipset drivers (which you should have already done). If those are installed, and the OS is reporting a bad number, it most likely isn't the OS.
You can also consider running the Dell Diagnostics. Since you reformatted the computer recently and probably deleted the diagnostic partition, you'll have to boot to the Dell Drivers and Utilities CD.
Edited by The Admiral, 10 February 2011 - 05:49 PM.