RV coach batteries should be deep cycle. They should not be a standard automotive type starting battery. Standard auto batteries cannot take the continued deep drain and recharge cycles of RV use.
The number one killer of all wet cell batteries is lack of water. Dry plates will kill a battery.
I check my battery water levels once a month. You will be surprised how much water "boils" out of an RV battery during normal usage. When topping off only use distilled water as minerals in tap water can ruin a battery as well.
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