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#2
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i guess if you have a deep cycle for the house and a cranking battery for starting you don't want them to draw on each other and a left on switch won't keep you from starting. you also are only charging the one your switch is on. i have 2 batteries (1000 mca) and i have them hooked up parallel. i run off both and charge both. if i need a jump, i call tow boatus. you can buy a charging isolator that will automatically send the charge to the weakest battery.
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