The new marine battery is sealed and does not require you to add distilled water. These high-performance types include gel batteries, Sealed AGM Battery and lithium-ion batteries with different chemical compositions.
Sealed AGM Battery: Sealed AGM Battery has fine, highly porous microfiber glass separators that are tightly compressed between the positive and negative plates of the battery. These separators are filled with acidic electrolytes just enough to activate the battery. During the charging process, the precision pressure valve allows the oxygen generated on the positive plate to migrate to the negative plate, recombine with the hydrogen, and produce water.
In addition to providing equal saturation on the entire surface of the battery's positive and negative plates, the fibers in the dense glass mat are embedded in the surface of the battery like steel bars in concrete, providing more plate support and better shock and vibration protection.
High-density Sealed AGM Battery has a lower internal resistance, allows greater starting power and charge acceptance, up to 40% of the total battery capacity, and charges faster than other types of deep-cycle batteries. Long life, low 3% self-discharge rate, and excellent performance make Sealed AGM Battery an ideal dual-purpose battery for boaters who need the fastest charging, fast start-up power, and reliable deep-cycle capability.
Sealed Deep Cycle Battery is also our product, welcome to consult and purchase.