Re: Silly Question - can you remove/swap batteries from the car if it's running?
Gosh, I don't know from experience with newer cars. I know for a fact it was safe on a 60's car. Heck, I did it! I would hope the alternator would supply enough Umph at idle on newer than 60's cars that it could be done ..... safely. If you so it, let us know.
Les