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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Amazon.com: iFixit A1398 A1494 Battery for MacBook Pro 15" Retina (Late 2013/Mid 2014) - Repair Kit : Electronics
Apple MacBook Pro with Retina Display (15-inch, 2014) review: Still the best higher-res laptop, but the competition is catching up - CNET
Apple MacBook Pro 15-Inch Retina Display (2014) Review | PCMag