It looks like I am going to have to get a new battery this winter. The last one is 4 years old so I guess I can't complain much. The question is how do I switch batteries without messing up all my presets, having alarm lights on in dash, radio, etc. I am sure it is posted somewhere on this site, but I can never find anything I am looking for here. I apparently don' t know how to do a simple search.