MacBook Pro 15" Unibody (Early 2011-Mid 2012) BatteryReplace a 6730 mAh battery compatible with MacBook Pro 15" Unibody Early 2011 to Mid 2012 A1286 model laptops. 77.5 Watt Hours (Wh). 10.95 Volts (V). Part #661-5844. Battery model #A1382.139$94.99View