Marine batteries are specialized power sources designed for use in boats and other watercraft. They are built to withstand harsh marine environments, including exposure to saltwater and vibrations. These batteries typically come in two main types: starting batteries, which provide a quick burst of energy to start engines, and deep cycle batteries, which deliver a steady amount of power over a longer period for running onboard electronics. These batteries are often made with durable materials and can be either lead-acid or lithium-ion. Proper maintenance and care are essential to ensure their longevity and performance. Choosing the right marine battery depends on the specific needs of the vessel and its electrical systems.