Marine battery (lead-calcium)
12V: 55 ->225 Ah Vetus

VETUS batteries are specially designed for use aboard pleasure craft, a situation which makes quite different demands compared with other applications. For instance, a pleasure boat is usually out of operation for many months over the winter, without the possibility to recharge the batteries. Minimal self-discharge is therefore of prime importance during these winter months. Unlike car batteries for example, marine batteries are often heavily discharged (by lighting, pumps, ventilation, etc.) without the engine running. Therefore, the battery must be able to sustain a prolonged current drain, but still be able to start the engine again.

LEAD-CALCIUM
This expression refers to the composition of the plate materials. By adding calcium to the lead instead of antimony, the water consumption is negligible in comparison with the volume of electrolyte. Therefore, topping-up with distilled water will never be necessary.
STATE OF CHARGE
The state of the charge can be easily verified. A simple hydrometer located
under a small lens ("magic eye") on top of the case will tell you clearly if the battery is fully charged or not.
LONG LIFETIME
A special construction of wrought grids, as well as the way in which these
grids are positioned and separated, gives a VETUS lead-calcium battery an
extremely long lifetime.