Once Apple decided to glue the battery in place starting with Retina Macbook Pros, a one-day battery service became harder to find.
All you can hope is that your Apple store agrees to pre-ordering a complete upper deck assembly( has the new battery attached) that is the right one for your computer and having it available for in-store installation. Other than that, replacement involves you or the store sending the computer to a centralized Apple service center where turnaround is usually fast but shipping time makes anything shorter than five days tough.
Bottom line: only Apple knows and they won't answer this here.