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MacBook Pro 13-Inch "Core i5" 2.3 Early 2011 Specs (Early 2011 13", MC700LL/A, MacBookPro8,1, A1278, 2419*): EveryMac.com
Would the battery from a 13" MacBook Pro (2010) work in a 15" MacBook Pro 2011? - Ask Different
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The MacBook Pro Review (13 & 15-inch): 2011 Brings Sandy Bridge
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MacBook Air "Core i5" 1.7 13" (Mid-2011) Specs (Mid-2011, MC965LL/A*, MacBookAir4,2, A1369, 2469): EveryMac.com
Apple MacBook Air 13" A1369 Battery
Determine battery cycle count for Mac notebooks - Apple Support
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The Display: Better than Most, Not as Good as the Pro - The 2011 MacBook Air (11 & 13-inch): Thoroughly Reviewed
Battery Life - The MacBook Pro Review (13 & 15-inch): 2011 Brings Sandy Bridge
Apple 15-inch MacBook Pro (Late 2011) Review
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Best Buy: Apple MacBook Pro 13.3" Intel Core i5 4GB RAM 320GB Hard Drive (MC700LL/A) Early 2011 (Certified Refurbished) Silver A1278
