Then there's also the preparation of the new battery. Read up what you are supposed to do, and if you're fitting a new battery in 19 minutes you are not doing it properly.
You'd be the first one in for a whinge if there was some problem with the new battery, too! And you'd be jumping all over the place if you found that the ginger beer hadn't fitted your new battery properly!!! (Like, if he did it in 19 minutes)