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Marine batteries are a variety of starting, lighting and ignition (SLI) batteries. They can be the conventional flooded-cell lead-acid design or absorbed glass mat (AGM). Typically, marine batteries possess deep-cycle capabilities or, in other words, the ability to be deeply depleted and recharged many times without damage to performance.



How Does it Work?

  • A marine battery is sometimes used for both engine starting and operating accessories such as lighting, fish finders and trolling motors
  • Similar to a car battery, the marine battery uses a chemical energy exchange process to store and dispense electrical energy

How Is It Made?

  • Held in a robust polyethylene or polypropylene case that is divided into 6 cells
  • Lead plates, active compounds and plate separators are precisely loaded into each cell
  • The cells are tied together with a lead strap that is terminated on one end with a positive post and the other end with the negative post

Why Does It Fail?

  • Remains discharged for a lengthy period of time which causes lead sulfate crystals to build on the plates, eventually limiting the batteries ability to hold a charge
  • Freezing can also damage a marine battery
  • Repeated high-rate discharge

What are Symptoms of Failure?

  • Performance in cranking ability will diminish
  • Battery will fail to hold a full charge

What Are the Consequences of Failure?

  • Failure of a marine battery can not be reversed, it must be replaced

If you have questions or concerns about marine batteries or any of your vehicle’s components, come into your local Pep Boys where we can answer any question, help you find any part, or perform any vehicle service you might need.