How to replace the battery in Apple MacBook Air 11-inch A1406 or A1375 (Mid 2011-Mid 2012) - YouTube
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DR BATTERY Replacement Battery A1496 A1405 A1377 for Apple A1369 A1466 MacBook Air 13 inch Late 2010 Mid 2011 Mid 2012 Mid 2013 Early 2014 Early 2015 Mid 2017 [7.6V / 55Wh] : Amazon.ca: Electronics
Keeping the Lights On: How To Replace a Macbook Air Battery – Lights in the Dark