Marine batteries face unique hazards. That is why Electro Battery Inc. in St. Petersburg offers a line of deep cycle batteries just for those vehicles. We have a full line of Aquamate batteries for your marine application. Electro Battery Inc. has a sharp focus when it comes to a marine battery:reliability. Our marine batteries are available in starting and deep-cycled models. Our Aquamate marine batteries are precision-engineered specifically to meet the demands of modern marine needs.