Review Apple MacBook Air 11 Mid 2011 (1.6 GHz, 128 GB SSD) Subnotebook - NotebookCheck.net Reviews
MacBook Air review (mid 2011) | Engadget
NewerTech® : Batteries
Puredick A1406 A1465 Battery, Replacement Battery for MacBook Air 11 inch (2012-2015 A1465) and (Mid 2011 A1370) - A1406 A1495 Battery for 11-inch MacBook Air [7.3V/35W/4790mAh]
Amazon.com: DMKAOLLK A1406 A1465 Battery for MacBook Air 11 inch A1465 (Mid 2011 2012 2013 Early 2014 2015 Version), A1370 Mid 2011 Version,fit for A1495 MacBook Air Battery : Electronics
Awesome Battery Life - The 2013 MacBook Air Review (11-inch)
How to Upgrade/Replace the Battery in a 11-inch MacBook Air 2010 - YouTube