994 Views 1 Reply Latest reply: Mar 28, 2011 10:20 PM by kostby
Did your replacement regimen include a new battery? Have you ever calibrated the battery? : http://docs.info.apple.com/article.html?path=Mac/10.6/en/9036.html
Reset the SMC? : http://support.apple.com/kb/HT3964?viewlocale=en_US
Does it start normally when the battery is removed entirely?
Does the Magsafe adapter still show a green light when connected and fully charged?
To check the number of cycles and 'health' of your battery, click on Apple in the menu bar, About This Mac, More Info, and Power. 'Average' lifespan of the standard battery is considered to be about 300 cycles, and a removable MacBook battery typically registers at least 4800-5000 mAh fully charged when brand new.
Last possibility that comes to mind is that you're wearing out the power switch if you indeed turn it off every night. In my experience, OS X is stable enough that I often leave mine run for weeks without a restart. I just close the lid when I'm not using it.
Message was edited by: kostby