opzs series is a flooded lead acid battery that adopts tubular plate technology to offer high reliability and performance. the battery is designed and manufactured according to din40736-2/iec60896-11 standards and with die-casting positive spine and patent formula of active material. opzs series exceeds din40736-2/iec60896-11 standard values with more than 20 years floating design life at 25℃ and is even more suitable for cyclic use(solar/wind energy, traction etc) under extreme operating conditions.