When you are storing the battery for the winter, you need to check on it regularly and charge if necessary or use a battery tender on it. If you allow the battery to deplete it's charge and stay dead, it will sulphate the battery rendering it useless and you will end up buying a new battery. I have a smart charger that I use to keep my batteries charged.
2012 Jayco Jayfeather X213
2004 Dodge Ram 1500 Laramie Quad Cab 4x4