Drypower 6SB3PDrypower 6V 3Ah Sealed Lead Acid BatteryUsage and Composition Backup and Main Power Cyclic Use Sealed Lead Acid (SLA) Battery Specifications Voltage 6V Watt Hour 18.0Wh Nominal Capacity 3Ah Physical Dimensions Termination F1 (4.8mm Spade) Width 34mm Height 59mm Length / Breadth / Depth 134mm Weight 670g