X2 on AGM batteries - my 1st experience with them was on a 2008 camper with Lifeline brand. Traded the camper in 9 years later and still had the original batteries. New trailer going on 3 years with Interstate AGM batteries with no problems. In most cases the batteries on rv's are hard to access to check and water levels plus some build up acid on the posts. With AGM, no water to check and no acid to clean. I wouldn't have any other type of battery on an rv even though they costs more. AGM batteries can be shipped by UPS unlike flooded batteries.