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Amazon.com: Replacement Laptop Battery for Apple MacBook Air 13 inch A1466(Mid 2012, Mid 2013, Early 2014, Early 2015,2017) A1369(Late 2010, Mid 2011 Version) 7200mAh,fits A1496 A1405 A1377 [New Upgraded 3.0] : Electronics
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MacBook Pro (Retina, 13-inch, Mid 2014) - Technical Specifications
A1582 Battery for Apple MacBook Pro Retina 13" A1502 Early 2015 Mid 2014 6559mAh | eBay
iFixit's new Retina MacBook Pro repair kit lets you change your old battery - The Verge
MacBook Pro 13" Retina Display Early 2015 Battery Replacement - iFixit Repair Guide
Amazon.com: iFixit A1502 A1493 Battery for MacBook Pro 13" Retina (Late 2013/Mid 2014) - Repair Kit : Electronics