[Festus2]

KMH -
On our Dometic (DM2652), which does have the Climate Control feature, the switch for it is located outside the fridge beneath the decoration panel that houses the control panel. The switch, which cannot be seen unless you either feel it or stoop, is a small, black rocker-type switch.
We've never been in any areas yet where the temperature and/or humidity is high enough to warrant turning the Climate Control feature on. So in our case, it's always been in the OFF position.
Are you certain that in some of the newer fridges, that there is a Climate Control feature that is always ON, cannot be turned off, and therefore would always draw from the battery? The fridge then would actually have a double draw on the battery - one for the control panel/board and another for the Climate Control? Or are they both all part of the control panel/board?

In any case, the fridge depends upon the battery to operate and will draw on it regardless of whether or not the Climate Control function is on or it is not a feature of the fridge.