Amazon.com: A1278 A1322 Battery for MacBook Pro 13 inch Mid 2012 2010 2009 Early 2011 Late 2011 A1278 MacBook pro 2012 2011 2010 Battery Replacement 661-5557 661-5229 MB990LL/A MB991LL MC375LL MD314 MC724LL : Electronics
MacBook Pro 17" Unibody Battery Replacement - iFixit Repair Guide
Amazon.com: A1278 A1322 Battery, POWERWOO MacBook pro Battery Replacement 13 inch Mid 2012 2010 2009 Early 2011 Late 2011, a1278 Battery with 6000mAh 10.95V 65.7Wh - High Performance and Longevity : Electronics
Replacing the Battery in a MacBook Pro Unibody (2009-2012) in 5 Minutes! - YouTube
NewerTech® : Batteries : NuPower® Battery for MacBook Pro 17" Unibody Early 2009, Late 2009, & Mid 2010 Models