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Amazon.com: NinjaBatt Battery A1494 for Apple MacBook Pro Retina 15" [Mid & Late 2013 2014 Years] A1398 ME293 ME294 - Long Lasting [11.26V/95Wh] : 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: POWERWOO A1502 A1582 Battery for MacBook Pro 13 inch Retina (Early 2015, Mid 2014, Late 2013) A1493 Battery Replacement - High Performance [11.42V/ 74.9Wh] : Electronics
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How to Upgrade / Replace the Battery in a MacBook Pro Retina 15-inch (late 2013 - mid 2015) - YouTube
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