5200 mAh 10.8 V // compatible with : Models MacBook Pro 15.4" A1286 (Early 2011)MacBook Pro 15.4" A1286 (Late 2011)MacBook Pro 15.4" A1286 (Mid 2012)MacBook Pro 15.4" MC721LL/AMacBook Pro 15.4" MC723LL/AMacBook Pro 15.4" MD103LL/AMacBook Pro 15.4" MD104LL/AMacBook Pro 15.4" MD104LL/A"MacBook Pro 15.4" MD318LL/AMacBook Pro 15.4" MD322LL/A