MacBook battery calibration

Summary:Colleague and PowerPage contributor Kenn Marks Sr. contributes some tips on calibrating your MacBook battery.

Colleague and PowerPage contributor Kenn Marks Sr. contributes some tips on calibrating your MacBook battery.

MacBook battery calibration
A customer's MacBook Pro was shutting down while displaying that it still had 20 percent power remaining. Following are some links to calibrating your battery so that the power remaining indicator is more accurate.

This should be done every 3-6 months as your battery ages and is used, the amount of charge it can maintain decreases so re-calibration is necessary to maintain accurate feedback to the user.

Every battery you use should be calibrated because they are all unique and contain built-in circuitry and serial numbers which your computer can track.

Here are the battery calibration instructions from Apple:

Other beneficial battery monitoring applications and widgets include:

  • Jeremy Kezer's XBattery (US$15) which provides probably more information than you wish to see but is there if interested. Jeremy is the developer of the classic OS 9 MyBattery software.
  • Chris Sinai's coconutBattery has the most downloads of any battery monitoring software but is a little less informative than XBattery. coconutBattery keeps a running log of the battery self tests so you can monitor battery degradation and then perform calibrations in a more informed manner, i.e. when you notice that capacity has diminished x% it should probably be re-calibrated.

Other battery monitoring programs can be found at MacUpdate and VersionTracker. Which one do you use?

More battery coverage from The Apple Core is here. (Photo from Anatomy of an Apple battery 05 September 2006.)

Topics: Apple, Hardware


Jason D. O'Grady developed an affinity for Apple computers after using the original Lisa, and this affinity turned into a bona-fide obsession when he got the original 128 KB Macintosh in 1984. He started writing one of the first Web sites about Apple (O'Grady's PowerPage) in 1995 and is considered to be one of the fathers of blogging.... Full Bio

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