Recalibrating MacBook Battery
Getting a new Apple laptop is a great experience – from deciding that this is the laptop you are going to buy to finally taking it home and going through the unpacking ceremony. We are sometimes so eager to get started that most of us forget one little detail: did you calibrate your battery? Now the laptop comes charged so when we get it running and plug it in we are plugging in on top of its first factory charge. Most users have reported to me that they experience a loss in charge or the battery % never hits 100% (or only when plugged in). I always come back to recalibration as it seems to remedy most of these issues.

When you get a new laptop Apple recommends that you calibrate the battery first. The following applies to all models of the PowerBook G4, MacBook, MacBook Pro and MacBook Air. It’s not a complicated process, but whether or not you calibrate your Macbook Battery can make a big difference in the power you’ll get out of it.

  1. 1. Charge your computer till the adapter light is green and the onscreen indicator shows 100%.
  2. 2. Let the battery rest in the fully charged state for at least 2 hours.
  3. 3. Use you computer normally during this time.
  4. 4. After 2 hours disconnect the power adapter from your laptop and with the laptop still on let it run using battery charge.
  5. 5. The battery indicator will warn you when the charge is low and it is about to shut down.
  6. 6. Save everything and let the computer go to sleep.
  7. 7. Let your Mac Laptop sleep for about 5 hours and then connect the power adapter again and leave it connected until the battery is fully charged.

If you have an older iBook or PowerBook G4 that is older than the 15-inch Double-Layer Super Drive, you will have to do the following:

  1. 1. Charge your laptop until it is fully charged – essentially when the indicator light goes from amber to green.
  2. 2. Next, disconnect the power adapter from your laptop and use the computer normally until you get a low battery warning dialog on your screen. Save all open documents and projects. Keep your iBook or PowerBook on until it goes to sleep. At this point you are ready to recalibrate.
  3. 3. Connect the power adapter again and let your iBook or PowerBook recharge.

Once you have fully charged the laptop again you can use it normally. If your iBook or PowerBook is still not holding a charge it might be time to replace the battery. Laptop batteries tend to last two years on average and Apple’s seem to hold their charge longer with bi-monthly calibration.

If you want to learn more about Macbook battery problems, check out my MacBook Pro Battery’s Problem: The Ever Expanding MacBook Battery

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