Maintenance-free batteries in gel technology Durability: 700 cycles according to IEC 254 Part 1 with 75% DOD Specifications: Nominal capacity 50 Ah (C20) Nominal capacity of 55 Ah (C5) Nominal voltage 12 V Connection autopol Constant-voltage charging at 2.35 V / cell Length 278 mm Width 195 mm Height 190 mm Shipping Weight: 20.00 kg