Ritar 12v 200ah smf deepcycle (dc) battery with design life of 10+ years at 25o c (77o f ) is specially designed for frequent cyclic discharge. by using strong grids and specially designed active material, the dc series battery offers 30% more cyclic life than the standby series with zero self discharge. it is suitable for ups, solar and wind energy, telecom system, electric power system, electric vehicles, and lots more.