This replacement MacBook Pro 13" (2009 - mid 2012) battery is what you need to bring your laptop back to life. It has 63.5Wh capacity, which is the highest capacity available for this model of MacBook Pro. It will make your laptop run almost twice as long as with your current old battery.
Watt Hours: 63.5Wh
Milliamp Hours: 5800mAh
Top quality Lithium-Ion Polymer cells
Brand new, recently manufactured
Compatible model numbers: A1322, A1278