Before you buy do some research..... I suggest you Google Interstate Batteries.... they are nationwide and have excellent service.... they will install them (no cost)and coat the terminals.... since they are nationwide, their warranty policies are consistent.... I have used them for years and feel secure that they are nationwide.... they have answered all of my questions and I never have felt they were just trying to "sell" me.... FMCA has a video out with Nationwide that explains the new Deep-Cycle RV battery.... AGM is probably the best but it is a bit pricey but lasts a long time. Good Luck.