Keep the battery and its surroundings clean. The surface of the battery must always be dry, otherwise surface leakage currents may occur between the individual banks, due to which the battery will discharge itself.
The electrolyte level must always be at the ring located on the bottom side of the filling chamber. Distilled water should be used for topping up.
In cold weather, do not leave the battery uncharged, otherwise the electrolyte in it will freeze. Weakly charged batteries freeze already at temperatures around -10°C.
Battery storage
Batteries that are not used for a long time will discharge on their own and may be subject to plate sulphation. If such batteries are charged with a fast charger, they do not accept charging current due to the so-called surface charging.