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Deep cycle batteries are designed to provide steady and sustained power over an extended period, unlike starting or automotive batteries which are intended for brief bursts of high power to start an engine. These batteries are built with thicker lead plates and more dense active material, resulting in a greater capacity to deeply discharge and recharge multiple times without compromising their performance or lifespan. Deep cycle batteries are commonly used in various applications such as renewable energy systems, electric vehicles, marine and recreational vehicles, and other industrial equipment that requires dependable power for extended periods. They can be found in different chemistries like lead-acid, absorbed glass mat (AGM), gel, and lithium-ion, each having unique advantages and trade-offs regarding performance, cost, maintenance requirements, and environmental impact.