<P> The term "flooded" is used because this type of battery contains a quantity of electrolyte fluid so that the plates are completely submerged . The electrolyte level should be above the tops of plates which serves as a reservoir to make sure that water loss during charging does not lower the level below the plate tops and cause damage . Flooded batteries will decompose some water from the electrolyte during charging, so regular maintenance of flooded batteries requires inspection of electrolyte level and addition of water . Major modes of failure of deep - cycle batteries are loss of the active material due to shedding of the plates, and corrosion of the internal grid that supports active material . The capacity of a deep cycle battery is usually limited by electrolyte capacity and not by the plate mass, to improve life expectancy . </P> <P> The vast majority of deep cycle batteries on the market today are lead acid batteries . Lead acid batteries are recycled 98% by volume, 99.5% by weight . The plastic cases, lead plates, sulfuric acid, solder, and other metals are 100% recovered for reuse . The only part of a battery that is not recyclable is the paper separators that wrap the plates . Due to the acid bath the paper sits in, the fiber length is reduced so far that it cannot be rewoven . </P> <P> Industry wide, there is a greater than 98% rate of recovery on all lead acid batteries sold in the United States, resulting in a virtually closed manufacturing cycle . </P>

What is the advantage of a deep cycle battery