Marine Batteries

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Our marine battery line includes brands such as LifeLine, NorthStar, OPTIMA and Dakota Lithium. Sealed AGM batteries can ship direct to your door or to any facility you are docking your boat for service and installation. Impact Battery also has a large selection of waterproof, multi-bank boat chargers.

Cranking Batteries vs. Deep Cycle Batteries

On the outside there really is no difference in appearance besides maybe the terminal type. However, once you get past the raw materials of the plastic case, lead, AGM material, and acid there are some fundamental differences.

Marine deep cycle batteries used in pleasure boating and for trolling motors, for example, are designed to provide a constant current over an extended period of time. To maintain the ability to supply power over longer periods of time the plates are made thicker. This initiates the deep cycle nature and allows discharge of up to 80% of their capacity routinely. They still have the ability to provide a short but less powerful burst of power compared to a similarly sized car battery, but this is not their primary function and is more like a byproduct.

As the name suggests, marine cranking batteries or starting batteries are designed to turn over an engine by providing a high rate of current over a very short time period. These batteries cannot handle continuous load deep discharge situations. They will leave you wanting and will die a premature death when used for applications other than starting an engine. To achieve the necessary burst of current (CCA) these batteries need to lower their internal resistance. Generally speaking, this is accomplished by using thinner lead plates.

Dual Purpose starting / deep cycle AGM marine batteries try to maximize the Cold Cranking Amps (CCA), Reserve Capacity (RC) and Cycle Life. NorthStar, Optima Blue Tops and Odyssey batteries are the best in class for dual purpose specs. NorthStar batteries, which use 99.99% pure lead and are considered an ultra-premium AGM marine battery, lead in all three categories making them the market leader in deep cycle and starting power ability. Order your batteries online today!

 

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