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Today, the most popular marine battery charger is a three-stage charger, also called a smart charger.  They are easy to use, worry free, won’t overcharge your batteries and you can leave them on 24/7. 

Smart chargers detect voltage and resistance from the battery before they start charging and then determine which stage to charge, bulk, absorption or float.

Set them to correct battery chemistry to make sure your batteries get the exact charge profile.

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