Replacement laptop battery for Apple laptops & notebooks, models include MacBook Pro 13'' (Mid 2009, Mid 2010, Early 2011, Late 2011, Mid 2012). This is an OEM replacement for Apple part numbers including A1322, A1278. See the specs tab for detailed Apple laptop compatibility. This 6,000 mAh Lithium-Ion battery is rated at 10.95V and has an average run time of Up to 5.0 Hours. The longevity rating is 300-500 Cycles and it comes with a 1 year warranty. Micro Center offers laptop battery replacement and installation services to ensure your laptop will be back up and running quickly ask the store for details.