Yuasa np series sealed valve regulated lead acid sla batteries 6v amp 12v yuasa np28 6 a 6v 28ah sealed valve regulated lead acid sla battery from the yuasa np seriesthe batterys unique style of construction ensures that there is no electrolyte leakage it may be used in either standby or cyclic applications achieving up to 1200 charge discharge cyclestypical uses include memory back up systems test equipment fire and security alarms as well as golf trolleys wheelchairs emergen