Learn how to determine the number of cycles your Mac laptop's battery has. MacBook Pro (Retina, 15-inch, Mid 2015) MacBook Pro (Retina, 15-inch, Mid 2014)
I learned that the battery is glued to the bottom case of the MacBook Pro and when replacing battery, technically your entire bottom case is replaced. You end up getting a new keyboard, trackpad and the unibody case. Your MacBook may be covered under Apple Care if you bought it. Yes, you can run it without the battery.
MacBook Pro 15" Retina Display Late 2013 2.0GHz, 2.3GHz, or 2.6GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.8GHz) with 6MB shared L3 cache. 578 Questions View all W2dsG.