Amazon.com: A1417 Battery Only for (Mid 2012 & Early 2013) A1398 MacBook Pro - Replacement Battery for A1398 MacBook Pro 15-inch Retina (Mid 2012, Early 2013 Version) - EMC 2512 or 2673 [11.26V/99Wh] : Electronics
Quality factors relevant for getting a replacement battery (MacBook Pro (13- inch, Mid 2012)) - Ask Different
iFixit posts repair guide for Retina MacBook Pro, estimates battery replacement at $500 - 9to5Mac
How to Replace the Battery in a 15-inch MacBook Pro non-Retina (2011-2012) MacBookPro8,2 - YouTube
Amazon.com: iFixit A1398 A1417 Battery for MacBook Pro 15" Retina (Mid 2012-Early 2013) - Repair Kit : Electronics
NewerTech® : Batteries : NuPower® Battery for MacBook Pro 15" Retina mid 2012 to early 2013 Models
Amazon.com: A1382 Battery for MacBook Pro 15 inch A1286 Early 2011 Late 2011 Mid 2012 New Replacement Laptop Battery (7200mAh 10.95V/78.84Wh 25 Months Warranty) : Electronics
Apple Exchanging Some 2012 and Early 2013 MacBook Pros Needing Battery Service With Newer Models [Updated] - MacRumors
Is upgrading the mid-2012 MacBook Pro Worth It? - Learn Robotics
Amazon.com: iFixit A1398 A1417 Battery for MacBook Pro 15" Retina (Mid 2012-Early 2013) - Repair Kit : Electronics
Replacement Laptop Battery For Apple Macbook Air 13 Inch A1466(Mid 2012, Mid 2013, Early 2014, Early 2015,2017) A1369(Late 2010, Mid 2011 Version) | Shopping from Microsoft Start
Amazon.com: Replacement Laptop Battery for Apple MacBook Air 13 inch A1466(Mid 2012, Mid 2013, Early 2014, Early 2015,2017) A1369(Late 2010, Mid 2011 Version) 7200mAh,fits A1496 A1405 A1377 [New Upgraded 3.0] : Electronics
Amazon.com: A1417 Battery Only for (Mid 2012 & Early 2013) A1398 MacBook Pro - Replacement Battery for A1398 MacBook Pro 15-inch Retina (Mid 2012, Early 2013 Version) - EMC 2512 or 2673 [11.26V/99Wh] : Electronics
15" Top Case Keyboard Trackpad Battery A1398 MacBook Pro Retina Mid 2012 E 2013 | eBay