How to Replace the Battery in a 13-inch MacBook Air (Mid 2011) MacBookAir4,2 - YouTube
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Amazon.com: Replacement Battery for MacBook Air 13 inch A1466 (Mid 2012, Mid 2013, Early 2014, Early 2015,2017) A1369(Late 2010, Mid 2011) 7200mAh Laptop Battery for Apple MacBook Air A1496 A1377 A1405 Battery : Electronics