The battery is built in - the user can not replace it. They have to send it off to Apple to have the battery replaced.
Or can you show me how to replace the battery? When you do please notify apple as they appear -Apple does not warrant the battery beyond Apple’s one-year Limited Warranty. The battery has a limited number of charge cycles and may eventually need to be replaced by an Apple Service Provider. Battery life and charge cycles vary by use and settings. See www.apple.com/batteries for more information.- to be under the impression that it isn’t a user replaceable part.
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Since Dec 29, 2008