How long do we want batteries to last ?
IMO, and IME, nothing is simpler to maintain than LA RV batteries. When connected to a decent charger, and watered once...maybe twice a year, and maybe hosed off once in a while, they last an easy 8-1...
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I know of 2 that sold their Priuses at 8 yrs cuz they needed batteries. They never bought another either !
