Specification Type: Brand new, Li-ion, replacement battery Capacity:77.5Wh Voltage:10.95V Number of Cells：6 Cells recharge cycles： 500 Operation time: Around 2-3 hours Condition:100% New from Manufacturer. Compatible Part Number: A1382 661-5844 020-7134-A Compatible Models: This battery is only for MacBooks manufactured in 2011 & 2012, not work for laptops made in or before 2010. For Apple Macbook Pro 15.4 inch Early 2011 Version (Identifiers: MacBookPro8,2) For Apple Macbook Pro 15.4 inch Late 2011 Version (Identifiers: MacBookPro8,2) For Apple Macbook Pro 15.4 inch Mid 2012 Version (Identifiers: MacBookPro9,1).
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