SLODA A1494/A1618 Replacement Battery Compatible with Macbook Pro 15" Retina A1398 (Late 2013 Mid 2014 Early 2015 Mid 2015) Laptop Battery [Li-Polymer 11.4V 8680mAh]: Amazon.co.uk: Computers & Accessories
Amazon.com: Replacement A1494 A1618 Battery for MacBook Pro A1398 (Late 2013, Mid 2014, Mid 2015 Version), Apply to MacBook Pro 15 inch Retina Late 2013,Mid 2014 and Mid 2015 : Electronics