5200 mAh 7.3 V // compatible with : Models MacBook Air 13.3" A1369MacBook Air 13.3" A1466MacBook Air 13.3" MC503LL/A*MacBook Air 13.3" MC965LL/A*MacBook Air 13.3" MD231B/AMacBook Air 13.3" MD231D/AMacBook Air 13.3" MD231F/AMacBook Air 13.3" MD231J/AMacBook Air 13.3" MD231K/AMacBook Air 13.3" MD231LL/A*MacBook Air 13.3" MD231N/AMacBook Air 13.3" MD231X/AMacBook Air 13.3" MD231Y/AMacBook Air 13.3" MD508LL/A*MacBook Air 13.3" MD760LL/B*MacBook Air 13.3" MJVE2LL/A*