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NewerTech® : Batteries : NuPower® Battery for MacBook Pro 15" Unibody Early & Late 2011, Mid-2012 Models
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MacBook Pro 15-Inch "Core i7" 2.3 Mid-2012 Specs (Mid-2012 15", MD103LL/A, MacBookPro9,1, A1286, 2556*): EveryMac.com
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Apple Still Offering Free Delayed Battery Repairs for Some 2012 and Early 2013 MacBook Pros - MacRumors
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