My car seems to be working fine without having it registered. I'm going to see if this BMW shop near me does it. If they do I'm sure it will not cost as much as a dealership. It would be nice if dealers had a flat fee for registering a battery. Also the dealer near me told me websites like this are BS and I should not listen to any advice given.
"When choosing between two evils, I always like to try the one I've never tried before."