How To: Replace the battery in your MacBook Air 13" (Early 2015) - YouTube
Apple Says Battery Can Be Replaced Individually in New MacBook Air With Retina Display - MacRumors
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
Keeping the Lights On: How To Replace a Macbook Air Battery – Lights in the Dark
Battery for laptop APPLE Macbook Air 13 A1496 ( 2013, 2014, 2015 )