Montana high country 338DB needs more batteries

The AGM advantage is not just the zero maintenance thing. They are rated for far more discharge cycles than a wet cell. They also will take a much deeper discharge & recover than a wetcell. During storage the discharge rate is half that of a wetcell. Leave an AGM all winter with no maintenance, no problem. Adding more batterys in a location other than an area intended for wet cells, no problem. Put them in storage compartment under your bed if you wish, no problem.