A deep cycle marine battery is one of the most important power sources for boats, RVs, and even off-grid systems. Unlike a regular car battery, which delivers a short, powerful burst to start an engine, a deep cycle battery provides steady, consistent energy over a long period of time. For boaters, this means reliable power for trolling motors, fish finders, lighting, radios, and other onboard electronics. Understanding how these batteries work, their types, and how to maintain them can help you maximize performance and extend their lifespan.

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