MacBook Pro 15" Retina (Mid 2012/Early 2013) Battery – iFixit Store
2011 - Mid 2012 non-Retina 15" MacBook Pro battery
Recyclers disagree on impact of glued-in Retina MacBook Pro batteries | Ars Technica
Free Batteries Replacement for MacBook Pro 2012-2013 | iGotOffer
NewerTech 95W NuPower Battery for 15" MacBook Pro NWTBAP15MBR95W
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