Lenmar LBMC1278 Replacement Battery for Apple MacBook 13" Aluminum Unibody Series Laptop Computers: * Fits: Apple MacBook 13" Aluminum Unibody Series, MB466J/A, A1278, 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