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I came into possession of a 2009 13" MacBook Pro. Most of the time, it will be used as a desktop computer - but there will be instances when I will need the 5 hour battery.

Is there any danger to letting the machine stay on AC for weeks at a time? Will it kill the battery, or does the Macbook have a charge/discharge routine?

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marked as duplicate by patrix Apr 24 '13 at 7:03

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 1 down vote accepted

Ideally you should let your computer discharge completely every month to avoid losing battery capacity.

Apple has a calendar to remind discharging the computer every month at webcal://

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This is incorrect. Read my answers to this question the previous time it was asked: – Fake Name Apr 24 '13 at 6:46

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