‘Tubular Flooded’ is a traditional technology for batteries, positive plate is tubular in type and the electrolyte is dilute sulfuric acid. Tubular Flooded batteries are very reliable and robust against harsh environments and ideally suited for all reserve power applications that require the highest levels of reliability and security. Tubular Flooded batteries are not gas recombination in type and need more maintenance than VRLA batteries. NARADA OPzS Series Lead Acid batteries are designed with a combination of die-casting Tubular positive framework and superfluous electrolyte technologies to offer a very high lever of reliability and a long service life.