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logicstudiouser

macrumors 6502a
Original poster
Feb 4, 2010
534
1,071
I have a 17" MacBook Pro that I use as both a desktop and a portable computer.
I will have days when I continue to work from my desk at home and the macbook pro could be plugged in for 5 days. I notice the longer I have my macbook pro plugged into the wall, the battery charge dips from 100% to 99 than 98 than 97. I have had it go all the way to 91% once.
Why does it do this? Is this normal or is there something wrong with my battery?
Btw, I had the battery replaced with a new official apple battery (not a generic third party battery), 8 months ago, so my cycle count is about 105 and in the 'System Information' app, my battery status shows up as 'normal'.
 
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