Marine Electrical Systems USCG Question #1026 (Set 35)

What statement is true concerning the charging a 100 amp-hour lead-acid battery?

Official USCG Answer & Rule Citation

Correct Answer: Option A — The initial charging rate should be no greater than 100% of the battery amp-hour rating.

Initial charging rates for lead-acid batteries must not exceed the amp-hour rating to prevent excessive gassing, high internal temperatures, and plate degradation. Controlled charging preserves battery lifespan and structural integrity.

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