Amazon.com: A1322 Battery, A1278 Battery for MacBook Pro 13 inch (Mid 2009, Mid 2010, Early and Late 2011, Mid 2012 Version) 661-5229 661-5557 020-6547-A 020-6765-A : Electronics
Amazon.com: Ftenlyen A1322 A1278 Battery Replacement - A1322 Battery for MacBook Pro 13 inch Mid 2012 2010 2009 Early 2011 Late 2011 Version High-Performance and Long Lasting [ 10.95V 63.5WH ] : Electronics
MacBook Pro Battery Replacement (Early 2011 to Mid 2012) - YouTube
Amazon.com: Ankon A1382 A1286 Laptop Battery for Apple MacBook Pro 15" i7 (Only for Core i7 Early 2011 Late 2011 Mid 2012 Version) MB985 MC721 661-5476 661-5211 [6-Cell 77.5WH] : Electronics
Macbook Battery Replace with a thread - Part 1 of 2 - YouTube