CSE High Performance New Laptop Battery for Apple MacBook Air 11 A1406 A1370 A1406 A1495 (2011 2012 2013 2014 Version) MacBook Air 11" 020-7376-A 020-7377-A MC968 MC965 MC506LL MC969LL Compatible Models: Apple Macbook Air 11 inch Macbook A1370 A1406 A1465 A1495 (Mid 2011 2012 2013 Early 2014 2015 Version), Part number: MC968 MD223 MD711 series. Battery Capacity: 5200mAh (39Wh) Battery Voltage: 7.3V or 7.6V Battery Cell: Li-Polymer For your macbook to provide the perfect endurance and 12-month warranty Please confirm that your laptop's model number, the original A1406 or A1495 battery's part number and your laptop's version correctly match this replacement battery. You can access this information on your computer by: About this Mac --&gt;More info... --&gt;Serial number--&gt;Check your laptop's version on Apple's offical website or Google the serial number.