Drypower 12SB55CLDrypower 12V 55Ah Sealed Lead Acid BatteryUsage and Composition Backup and Main Power Cyclic Use Sealed Lead Acid (SLA) Battery Specifications Voltage 12V Watt Hour 660.0Wh Watts Per Cell 285W Nominal Capacity 55Ah Physical Dimensions Termination F8 (M6 Bolt) Width 226mm Height 214mm Length / Breadth / Depth 135mm Weight 17.0Kg