NewerTech® : Batteries : NuPower® Battery for MacBook Pro 15" Retina mid 2012 to early 2013 Models
Amazon.com: DR. BATTERY Replacement Battery for Apple A1278 MacBook Pro 13 inch Mid 2009 Mid 2010 Early 2011 Late 2011 Mid 2012 [10.95V / 70Wh] : Electronics
MacBook Pro (Retina, 15-inch, Mid 2012) - Technical Specifications
MacBook Pro Mid 2012 Battery Full charge … - Apple Community
MacBook Air 5,2 (13-Inch, Mid 2012) - Full Information, Specs | iGotOffer
Apple MacBook Pro (Retina 15-inch Mid 2012) Serial Number Lookup - AppleSN.info
MacBook Pro 13" A1278 battery
Best Buy: Apple MacBook Pro 13.3-inch 500GB Intel Core i5 Dual-Core Laptop (MD101LL/A) Mid-2012 Pre-Owned Silver A1278
Amazon.com: DMKAOLLK A1322 Laptop Battery for MacBook Pro 13 inch A1278 (Mid 2009 2010 Early 2011 Late 2011 Mid 2012 Version) MB990LL/A MB991LL/A MC375LL/A MD314LL/A MC724LL/A - 12 Months Warranty : Electronics
Apple MacBook Pro 13 (Mid-2012) - Specs, Tests, and Prices | LaptopMedia.com
Mac Battery Replacement - Batteries for MacBook Pro and MacBook Air
Apple MacBook Pro 13" MD101LL-A Battery
Apple Has Fully Restored Inventory of Mid 2012 and Early 2013 MacBook Pro Batteries - MacRumors
Apple MacBook Pro 13-inch (Mid 2012) - Review 2012 - PCMag UK