Specification: Battery type: Li-ion Voltage:10.95V Capacity: 63.5Wh Cells：6cell recharge cycles： 500 Operation time: Around 1.5-3 hours Compatible Part Numbers: A1322, A1278, 661-5229, 661-5557, 020-6547-A, 020-6765-A For Apple MacBook Pro 13'' A1278 MacBook Pro 13'' A1278 Mid 2009 Version MacBook Pro 13'' A1278 Mid 2010 Version: MacBook Pro 13'' A1278 Early 2011 Version MacBook Pro 13'' A1278 Late 2011 Version.
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