You can finally replace the battery in your MacBook Pro with Retina by yourself if you've got the nerve | iMore
Laptop Battery A1322 For Apple Macbook Pro 13" A1278 Mb990 Mb991 Mc700 Mc374 Md313 Md101 Md314 Mc724 Mc375 Mc374ll/a - Laptop Batteries - AliExpress
Amazon.com: A1382 Battery for MacBook Pro 15 inch A1286 Early 2011 Late 2011 Mid 2012 New Replacement Laptop Battery (7200mAh 10.95V/78.84Wh 25 Months Warranty) : Electronics