VETUS batteries are designed to take the varying seasonal demands of boating into consideration. Batteries will mostly be unused during the winter months, so our batteries have a minimal self-discharge rate and can still be relied upon to start the engine again the following season. We strongly advise the use of a float charger during winter storage. During the boating season, our batteries can supply both small constant loads as well as heavy but short loads for the use of a bow thruster. VETUS offers three different types of marine batteries, each with their own characteristics.