[jcurtis934]

Most quality battery switches are non-arcing switches meant for use in the same compartment as lead acid batteries which do vent a lot of gas on occasion. Agm batteries were developed for use by the military in sensitive locations and can be mounted in any orientation. It would be a very rare circumstance for them to vent at all. I use two group 31 agm batteries mounted in battery trays bolted through the compartment floor and connections are covered and protected, but not vented. The factory cables have been replaced with marine grade two gauge cable using sealed marine grade tinned copper sealed lugs secured with a five ton hex crimper tool. The factory cable connections using cheap thin hand crimped automotive connectors were not to my standards.