This link has been bookmarked by 7 people . It was first bookmarked on 01 Aug 2008, by Werner E. L..
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11 Dec 11
Suzanne Baraffprocedure for calibrating battery monthly
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07 Jul 09
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22 Nov 08
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01 Aug 08
Werner E. L.Main purpose it to have accurate time readings on capacity. Basically, run the battery empty and let rest for at least 6 hrs.
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Apple does not include a utility to automatically perform a calibration.
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Primarily the goal is to ensure that the microprocessor in your battery provides an accurate estimate of how much time you have left on the battery.
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In a nutshell, you fully charge the battery, fully discharge it, then fully charge it again. It's unclear whether modern lithium batteries gain anything in an actual capacity perspective from this process, or if it is simply a calibration of the microprocessor for the purpose of providing accurate time estimates.
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follow these steps taken from Apple's battery calibration knowledge base article:
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ully charge your PowerBook's battery
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Allow the battery to rest in the fully charged state for at least two hours.
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Disconnect the power adapter with the computer still on and start running the computer off battery power.
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until it goes to sleep.
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Turn off the computer or allow it to sleep for five hours or more.
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Connect the power adapter and leave it connected until the battery is fully charged again.
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31 Jul 08
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Chris CraftSo if you'd like to perform a calibration manually on your modern Mac portable*, follow these steps taken from Apple's battery calibration knowledge base article:
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