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Amazon.com: New Laptop Battery Compatible with MacBook Pro 13'' A1322 A1278 (Mid 2009, Mid 2010, Early 2011, Late 2011, Mid 2012)fits MB990LL/A MB991ll/A MC374ll/A MC375LL/A MC700ll/A MD101LL/A MD102LL/A : Electronics
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Amazon.com: New Laptop Battery Compatible with MacBook Pro 13'' A1322 A1278 (Mid 2009, Mid 2010, Early 2011, Late 2011, Mid 2012)fits MB990LL/A MB991ll/A MC374ll/A MC375LL/A MC700ll/A MD101LL/A MD102LL/A : Electronics
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How-To: Find your MacBook's battery cycle count and learn what it means about its battery life - 9to5Mac
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Amazon.com: Fancy Buying A1331 13" A1342 (Late 2009 Mid 2010) Laptop Battery for Apple MacBook Unibody fits 661-5391 020-6582-A MC233LL/A MC207LL/A MC516LL/A : Electronics
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