Battery Power Meter Discrepancy

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I have two battery power meters on my sony pcg-sr17k.  The sony
provided power utility appears to do a more thorough job of predicting
remaining battery time.  It says 2 hours right now whereas the windows
power meter says 30 mins.  I'd like to disable the windows power meter
from showing up in the taskbar.  I have no desire to have two meters
sitting beside each other.
any clue how to make the windows power meter never show up?


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