A marine battery is a specialized battery designed to power boats and other watercraft. Unlike regular car batteries, marine batteries are built to withstand the harsh conditions of the marine environment, including vibrations, humidity, and extreme temperatures. They come in three main types: starting batteries, which provide a quick burst of power to start the engine; deep-cycle batteries, which deliver steady power over extended periods; and dual-purpose batteries that combine both functions. Marine batteries are typically made with thicker plates to prevent corrosion and are essential for operating on-board electronics, navigation systems, and other equipment.