Apple 13.3" MacBook Pro with Retina Display MXK32LL/A B&H Photo
A1321 Battery for MacBook Pro 15" Unibody A1286 Mid 2009-2010
Amazon.com: 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
It's Shockingly Easy to Change Your Own Computer Battery - Post | The Caret
Amazon.com: 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