Will Apple Store Replace Battery While You Wait. Answered 5 years ago. Send in for repair.

The service is free if your phone is under warranty otherwise it will cost you. In some cases your battery fix may be too complex and it will need to be sent to an Apple Repair Center. Includes step-by-step online videos to make battery installation a breeze.
Heres what Apple says about it.
Heres what Apple says about it. It should not take days. Allegedly there is a screen replacement service offered too but they wouldnt do that and told me I needed to buy a new phone. So the answer is yes they can do it while you waitbut it may be a few hours.
