Apple MacBook Pro (15-inch, 2013) review: Apple's high-end laptop gets better battery life and a lower price - CNET
Replacing Battery for Macbook Pro 15" Late 2013 (iFixit Kit) A1494 - YouTube
Amazon.com: iFixit Battery Compatible with MacBook Pro 15" Retina (Late 2013 /Mid 2014) : Electronics
Battery for Apple MacBook Pro 15 inch Retina A1398 (Late 2013),replacement Apple MacBook Pro 15 inch Retina A1398 (Late 2013) laptop battery from Singapore(95Wh,6 cells)
Apple MacBook Pro 15" A1398 A1494 Battery Price In Pakistan
Amazon.com: SNSYIY A1398 MacBook Pro Battery A1494 A1618 Replacement for MacBook Pro 15 Inch Retina A1398 (Late 2013, Mid 2014, Early 2015), Laptop Battery A1494 A1618 8440mAh
iProPower A1494 A1618 Battery Replacement for 15” inch MacBook Pro A1398 Retina Laptop, End 2013 Mid 2014 Early 2015: Amazon.co.uk: Computers & Accessories