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April 08, 2004
Calibrate your PowerBook battery....
The battery of the PowerBook and iBook have a built-in processor that manages the remaining power and updates the battery life remaining that you see in your menu bar.
Check out this AppleCare knowledgebase entry for details on calibrating your PowerBook or iBook's battery. This needs to be done when the machine is new, and every few months thereafter.
I did the calibration on my 15" PowerBook G4 today, and after the battery drained down to 10 minutes remaining, I got that "You are now on reserve power" warning. Normally I go plug in when I see that... but this time I just kept working and watched the battery meter get down to 1 minute remaining. It stayed at the 1 minute mark for 30 minutes before it finally went to sleep. So, basically the battery's calibration was off by 30 minutes or so. Once the battery is fully charged, my total time remaining will be 30 minutes longer than it was before I calibrated.
Now to do this with my second battery....
Posted by Kevin Railsback at April 8, 2004 11:01 AM
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