How To Calibrate a Mac Laptop's Power System - NewerTech
NewerTech® : Batteries : NuPower® Battery for MacBook Pro 17" Unibody 2011 Models
Apple A1382 Battery For MacBook Pro 15" A1286 (Early 2011-Mid 2012)
Apple MacBook Pro 17-inch 2011 Edition Review
Apple 15-inch MacBook Pro (Late 2011) Review
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
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