MacBook Pro (Retina, Mid 2012) Battery Replacement - YouTube
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
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How To Calibrate a Mac Laptop's Power System - NewerTech
NewerTech® : Batteries : NuPower® Battery for MacBook Pro 15" Unibody Early & Late 2011, Mid-2012 Models