Genuine Original OEM Battery 2012 2013 2014 2015 2016 MacBook Air 11 A1370 A1465 - Newegg.com
MacBook Air (2010-2015): Replacing the battery (tutorial)
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
How To Test A MacBook Battery To See If It Needs Replacing And Replace It - Macworld UK