Chosen Solution
Is the battery replaceable with the apple oem model that is sold on this site?
It helps when you tell us what your model is. As an example here’s one battery IFIXIT offers: MacBook Pro 15" Retina (Mid 2012/Early 2013) Battery. The problem in the Retinal series is the battery is glued to the uppercase! So it can be dangerous just taking the battery out if you puncture a cell. Also Apple does not offer a replacement battery by its self. Instead it offers it as part of the uppercase assembly.
You may be able to find it here. MacBook Pro Repair
