MacBook Pro 15" Unibody Early 2011 Battery Replacement - iFixit Repair Guide
Amazon.com: A1322 Battery,Runpower Replacement Battery for MacBook Pro 13 inch A1278 Battery(Mid 2009 Mid 2010 Early 2011 Late 2011 Mid 2012) : Electronics
2010 Macbook Pro 15" A1286 Battery Replacement - YouTube
A1322 Battery for Apple MacBook Pro 13 A1278 2009-2012
Replacing the Battery in a MacBook Pro Unibody (2009-2012) in 5 Minutes! - YouTube
Amazon.com: Vinpera 77.5WH A1321 A1286 Laptop Battery for MacBook Pro 15" inch (Mid 2009, Mid 2010 Version) MB985LL/A MC118LL/A MC371LL/A MC372LL/A MC373LL/A MB986LL/A MB986J/A MB985 MB986 MC118 661-5211 : Electronics