ANSWERS: 1
  • Fully charging a marine battery takes at least several hours. Quick charging at a higher amperage takes less time, but can only achieve a 75 percent charge, enough to start an engine. Charging a battery longer and at lower amperage to achieve a full charge prevents the battery from becoming too depleted and failing prematurely.

    Source:

    Yachtsurvey.com: Boat Battery Basics

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