How long does boat battery last?

The lifespan of a boat battery typically ranges from 3 to 5 years, depending on usage, maintenance, and type. Deep-cycle batteries, often used for powering onboard electronics, may last longer with proper care, while starting batteries might have a shorter lifespan. Factors such as charging habits, temperature, and overall care can significantly affect longevity. Regular maintenance and monitoring can help maximize a battery's life.