For many years when I was on the road as a chassis vendor I had a 5th wheel trailer with a double deck for hauling 3 chassis. I had a Dutton Lainson 12 volt 5000lb winch which I powered with a regular Red top Optima battery. I did 8-9 shows a year and would put the battery on an Optima charger in the winter and the battery would keep a charge for the season. The battery lasted 5-6 years with regular maintenance.