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MacBook Pro 13" Retina Display Early 2013 Battery Replacement - iFixit Repair Guide
NewerTech® : Batteries : NuPower® Battery for MacBook Pro 13" Retina late 2012 to early 2013 Models
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How to Replace the Battery in the 13-Inch Retina MacBook Pro: EveryMac.com
Apple Exchanging Some 2012 and Early 2013 MacBook Pros Needing Battery Service With Newer Models [Updated] - MacRumors