Specifications: Nominal voltage: 12V Nominal capacity (20HR): 7Ah Maintenance: Free Dimension(LxWxHxTH): 151x65x94x100mm Weight/unit: 2.1kg "Advantages: * Full range of lead acid battery, with capacity 0.8Ah to 3000Ah * Maintenance-Free * Completely safe and sealed design * Gas recombination * Maintenance free * High discharge ability * Low self-discharge rate * Wide temperature range * Powerful recover ability * Long life cycle" "Applications: Marine systems, security systems, radio transceivers, medical equipment, electric power systems, all kinds of test machines, computer backup power supplies, emergency lighting/small lamp fitting, railway engines/railway communications, uninterruptible power supply for banks, fire protections and security,telecom system"