Goingpower Laptop Battery for Apple MacBook Pro 17" A1309 A1297 (2009 Version Early 2011) MC226*/A MC226CH/A MC226J/A MC226LL/A MC226TA/A MC226ZP/A MC665ZP/A MC725J/A Precision Aluminum Unibody (2009 Version) - 18 Months Warranty [li-polymer 7.4V 95Wh]