Expected lifetime: 8 - 10 years Nominal capacity: 18 Ah Voltage: 12V Maximum charging current: 5.4 A Overall height: 167 mm Dimensions [mm]: 181 x 77 x 167 mm Weight: 5.2 Kg + - 4% Internal resistance (25 ° C): 15 mΩ when fully charged Self discharge: 2-3% per month at 25 ° C Capacity (40 ° C): 102% Capacity (25 ° C): 100% Capacity (0 ° C): 85% Capacity (-15 ° C): 65% Buffer charge: 13.5 - 13.8 V (-18 mV / C) Cyclic charging: 14.5 - 15.0 V (-30 mV / C)