MacBook Core Duo PRAM Battery Replacement - iFixit Repair Guide
How to check if your MacBook is eligible for a free battery replacement -
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
Mac Battery Replacement - Batteries for MacBook Pro and MacBook Air
Batteries for MacBook Pro 15" Unibody 2011 - 2012 Models
NewerTech® : Batteries : NuPower® Battery for MacBook Pro 15" Unibody Mid-2009 and Mid-2010 Models
Amazon.com: VUOHOEG A1494 Laptop Battery Replacement for MacBook Pro 15 inch Retina A1398 (Late 2013 & Mid 2014);fit Retina ME293 ME294 : Electronics
A1437 Battery for MacBook Pro 13" Retina A1425 Late 2012-2013
How to Upgrade the Battery in a MacBook Pro Retina 15-inch (mid 2012 - early 2013) MacBookPro10,1 - YouTube
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 - Amazon.com
MacBook Pro 13" Retina Display Late 2012 Battery Replacement - iFixit Repair Guide