Trojan Battery Company has been manufacturing deep-cycle, flooded batteries for more than 90 years. Our experience has shown that the key factor to achieving optimum performance and long battery life is to follow a regular care and maintenance program. While reviewing our battery maintenance tips, please keep in mind that all battery systems are unique. Battery type, charger technology, equipment loads, cable size, climate, and other factors can all vary. Slight or significant, these differences will require battery maintenance to be adjusted accordingly these are only guidelines to follow for proper battery care. Each particular system will always require a degree of customized attention.