Educate me on 12 volt batteries

Guy Roan wrote:
Off and on I see posts regarding changing out the 12 volt battery to two 6 volt ones.
In the past thirty years I have had three trailers and never had a problem with the single 12 volt battery so could someone please explain the reason for swapping to two 6 volt ones.

Guy

Never had problems?
Be more specific. Nothing wrong with a 12V battery. However a statement like that makes me think your camper is plugged in to AC power most all of the time.