LENMAR Replacement Battery for Apple MacBook 13-Inch Aluminum Unibody Series Laptop Computers (LBMC1278) Fits: Apple MacBook 13 inch Aluminum Unibody Series, Select A1278 models, MB466J/A, MB466/A, MB466CH/A, MB466LL/A, MB466X/A, MB467/A, MB467CH/A, MB467J/A, MB467LL/A, MB467X/A, MB990LL/A, MB991LL/A Replaces: Apple A1280, MB771, MB771/A, MB771J/A, MB771LL/A 10.8V / 4200mAh Lithium Polymer 1 Year Warranty