After previous problems with a batch of Powerbook batteries, Apple has recently discovered that some batteries used in its MacBook and MacBook Pro notebooks may have battery performance issues and is offering a software update that is designed to improve battery performance.
Apple say that the factors causing the performance issues do not present a safety risk and that you may continue to use your current battery.
This battery update should be run on all MacBook and MacBook Pro computers and extra batteries that were purchased between February 2006 and April 2007.
Batteries will be eligible for replacement if, after installation of the battery update, the battery has one or more of the symptoms listed below.

• Battery is not recognized causing an “Xâ€� to appear in the battery icon in the Finder menu bar.
• Battery will not charge when computer is plugged into AC power.
• Battery exhibits low charge capacity/runtime when using a fully charged battery with a battery cycle count (as shown in System Profiler) of less than 300.
• Battery pack is visibly deformed.

Note: If your MacBook or MacBook Pro battery does not have any of the symptoms noted above, your battery does not need to be replaced.
More information:

• www.apple.com
  
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