Amazon.com: iFixit Battery Compatible with MacBook Pro 15" Unibody (Early 2011-Mid 2012) - Repair Kit : Electronics
Battery Indicator Board for Macbook Pro 13" A1278 (Mid 2009-Mid 2012)
Amazon.com: NinjaBatt Battery A1278 A1322 for Apple MacBook Pro 13" [Mid 2012 2010 2009 Early 2011 Late 2011] - High Performance [76.56Wh/11.6Vv] : Electronics
New Genuine OEM A1382 Battery for Apple MacBook Pro 15" A1286 early 2011 Mid2012 | eBay