How to Replace the Battery in a 15-inch MacBook Pro 2012 (MacBookPro9,1) - YouTube
NewerTech® : Batteries
KingSener A1382 10.95V battery for laptop Apple MacBookPro 15.4 - BatteryMall.com
Fancy Buying A1322 A1278 Laptop Battery for MacBook Pro 13 inch [2009 2010 2011 2012 Version] 661-5229 661-5557 020-6547-A 020-6765-A - Newegg.com
Amazon.com: AN·GWEL A1286 A1382 Laptop Battery for MacBook Pro 15 inch Early 2011 Late 2011 Mid 2012 MC721LL/A, MC723LL/A, MD035LL/A,MD318LL/A,MD322LL/A,MD103LL/A,MD104LL/A[10.95V 77.5Wh] : Electronics
A1382 A1286 Battery for MacBook Pro Battery 15 inch Mid 2012 Early 2011 Late 2011 A1286(7200mAh)) - AliExpress
Genuine A1382 Battery for MacBook Pro 15" A1286 Mid 2012 MacBookPro9,1 | eBay
Amazon.com: AN·GWEL A1286 A1382 Laptop Battery for MacBook Pro 15 inch Early 2011 Late 2011 Mid 2012 MC721LL/A, MC723LL/A, MD035LL/A,MD318LL/A,MD322LL/A,MD103LL/A,MD104LL/A[10.95V 77.5Wh] : Electronics
Amazon.com: Fancy Buying A1382 Battery for MacBook Pro 15 inch Core i7 (only for Early 2011 Late 2011 Mid 2012) A1286 MC721LL/A MC723LL/A MD035LL/A MD318LL/A MD322LL/A MD103LL/A MD104LL/A - [10.95V/77.5Wh] : Electronics
A1322 Battery for MacBook Pro 13" Unibody A1278 Mid 2009-2012