POWER-SONIC Marine batteries are designed to take the vibrations and wave pounding. They have superior starting power and moderate cycling capability with high‑density plate paste that lasts longer. They are durable and strong and are tested to withstand the demanding marine environment. POWER-SONIC Deep Cycle batteries are designed to provide sustained power for extended periods when continuously discharged. They are built to deliver small amounts of current over continuous periods of time. All POWER-SONIC Maintenance Free Batteries feature lead calcium expanded grids (lead calcium technology) for improved resistance to corrosion, gassing, and water usage, self‑discharge and thermal runaway, all of which limit battery life in conventional lead‑acid batteries.
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