NewerTech® : Batteries : NuPower® Battery for MacBook Pro 15" Unibody Early & Late 2011, Mid-2012 Models
15″ MacBook Pro (Mid 2009) | Low End Mac
MacBook Pro 15" Unibody Mid 2009-Mid 2012 LCD Replacement - Computer Systems Design
MacBook Pro 15" Unibody Late 2008 and Early 2009 Battery Replacement - iFixit Repair Guide
A1321 Original Battery for A1286 Apple MacBook Pro 15" (Only for Mid 2009, Early/Late 2010) - WIT Computers
A1321 A1382 Replacement Laptop Battery, Apple 15 Inch MacBook Pro 1286 A1382 For Mid 2009 Early/Late 2010 7200mAh/79Wh Best Buy - ShoppyPlace
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
Best MacBook Pro 15" Mid 2009 - Mid 2010 Replacement Battery | All Good Batteries