How Apple's new MacBook gets nearly as much battery life as the MacBook Pro with a battery half the size | AppleInsider
NewerTech NuPower Battery for MacBook Pro 17", NWTBAP17MBU03H
Apple MacBook Pro 15" MB985 LAP211 5200 mAh / 56Wh Notebook Battery - BattDepot United States
A1175 A1150 A1211 A1226 A1260 Laptop Battery for MacBook Pro 15 inch (2006 2007 2008 Version)
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
Amazon.com: BatPower A1713 Replacement Laptop Battery for Apple Late 2016 Mid 2017 MacBook Pro 13-inch A1708 EMC 2978 EMC 3164 Battery MacBook Pro 13" Two Thunderbolt 3 Ports A1708 Apple A1713 Battery 54.5Wh : Electronics