How to Replace MacBook Air Battery (Official/Self): EveryMac.com
How to check into a free battery replacement for MacBook Pro - 9to5Mac
Amazon.com: A1502 Replacement Laptop Battery for MacBook Pro Retina 13 Inch Late 2013 Mid 2014 Early 2015; MacBook Pro A1493 A1582 Battery EMC 2678 2875 2835 ME864 ME865 : Electronics
MacBook Pro 17" Unibody Battery Replacement - iFixit Repair Guide