Nomination of batteries Discharging current in 18 , not less L x W x H QtyType of Marine batteries EN DIN L W H Battery 12V 310 Ah 950 650 400±5% 450±5% 290±5% 40Battery 12 V 270 Ah 850 650 400±5% 450±5% 290±5% 42Battery 12 V 220 Ah 800 600 400±5% 450±5% 290±5% 40