A Li-battery lifebuoy light is powered by a lithium-ion (Li-ion) battery. These lights offer several advantages over traditional battery-powered lights, including longer operating times, higher energy density, and lighter weight. Li-battery lifebuoy lights are often rechargeable, providing extended periods of illumination without the need for frequent battery replacements. They are designed to be durable and waterproof, ensuring reliable functionality even in harsh marine environments. These lights typically feature high-intensity LEDs for increased visibility and may include additional features like automatic activation when in water or built-in self-testing mechanisms for maintenance purposes.