Lucas 12V 50AH (40AH 45AH) VRLA AGM/GEL BATTERY. AGM - DEEP CYCLE LUCAS BATTERIES. Low pressure relief valve. Fully Sealed (cannot spill) - Recharg eable - Deep Cycle battery. ALARM BATTERY. Based in Halifax, West Yorkshire, but not far from Bradford, Leeds and Huddersfield, we are only a short drive from Lancashire.