[Festus2]

As long as you keep your battery charged, it can be stored in "frigid" conditions and places. If you have a trickle charger, keep it in your garage - if you have A/C power - and hooked up to your battery. Today's batteries can be safely stored on concrete contrary to the belief/myth that some still hold that they can't.

I leave my batteries outside in the 5th all winter. Mind you, we don't get many that many days of below freezing temperatures but have had a couple of 1 - 2 week long periods of temps around -10C. When this happens, I plug in the 5th wheel to the house and use the converter charger to keep the batteries up. I also plug it in every so often throughout the winter for the same reason.