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
Amazon.com: iFixit Battery Compatible with MacBook Pro 15" Unibody (Mid 2009 /Mid 2010) - Repair Kit : Electronics
How to Upgrade the Battery in a 15-inch MacBook Pro 2009 MacBookPro5,2 MacBookPro5,4 MacBookPro6,2 - YouTube
Amazon.com: SLE-TECH A1321 Battery for Apple MacBook Pro 15" inch A1286 (Only for Mid 2009, Early/Late 2010), fits MC118LL/A MC373LL/A MB986LL/A Series Notebook : Electronics
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
How to Upgrade/Replace the Battery in a 17-inch MacBook Pro 2009 – 2010 MacBookPro5,2 MacBookPro6,1 - YouTube
Replacing the Battery in a MacBook Pro Unibody (2009-2012) in 5 Minutes! - YouTube
Amazon.com: Gomarty A1321 Laptop Battery for MacBook Pro 15 inch A1286 (Only for Mid 2009, Early/Late 2010) MB985 MB986J/A MC118LL/A MC373LL/A MB986LL/A MC721LL/A MC723LL/A 661-5844 020-7134-A : Electronics
Amazon.com: LQM® 7.3V 95Wh New Laptop Battery for Apple MacBook Pro 17" A1309 A1297 (2009 Version Early 2009 Mid-2009 Mid-2010),Compatible MC226*/A MC226CH/A MC226J/A 020-6313-C 661-5037-A : Electronics