BEFORE PLACING AN ORDER: Please identify the model and year of your Mac and make sure they are listed on the title. The easiest way is to do that is to go to About This Mac, available on the Apple menu in the upper-left corner of your screen. PREMIUM QUALITY REPLACEMENT NOTEBOOK BATTERY: Bring your laptop back to life with Ninjabatt's high quality laptop battery - Made of high quality materials, top grade battery cells and packed with safety features. COMPATIBLE WITH THE FOLLOWING MODELS: MacBook Pro Retina 13" A1502 MGX72LL/A ME864LL/A ME865LL/A MGX82LL/A ME866LL/A A1493 ME867LL/A MGXD2LL/A 020-8148 ME864 ME865 ME866 ME867 020-8184 MF840 MF43 MF41 MF40 MF841 MF843 MGX92 TRUE CHARGING CAPACITY THAT LASTS: Every one of our replacement notebook batteries are tested to meet OEM specifications. Our Li-po battery is rated at 72Wh/11.42V - true charge capacity that wont let you or your laptop down. HIGH QUALITY COMPONENTS & 12-MONT