Battery Life - The 2011 MacBook Air (11 & 13-inch): Thoroughly Reviewed
Apple MacBook Pro 13 inch 2011-10 MD313LL/A - Notebookcheck.net External Reviews
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Battery Life - The MacBook Pro Review (13 & 15-inch): 2011 Brings Sandy Bridge
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How to replace a 13-inch MacBook Pro battery
MacBook Pro (13-inch, Early 2011) - Technical Specifications
How to keep your MacBook Pro battery healthy for years | AppleInsider
Compatible Apple A1322 Li-Ion Replacement Battery for MacBook Pro 13 i | CameraPowerPro
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MacBook Pro 13-Inch "Core i5" 2.4 Late 2011 Specs (Late 2011 13", MD313LL/A, MacBookPro8,1, A1278, 2555*): EveryMac.com
NewerTech® : Batteries : NuPower® Battery for MacBook Pro 15" Unibody Early & Late 2011, Mid-2012 Models
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Battery Life - The 2011 MacBook Air (11 & 13-inch): Thoroughly Reviewed
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