Note: For batteries with a common lid for all elements, equipped with a capacitor cavity, it is permissible to check the electrolyte level once every two months.
The electrolyte level in all elements must be between the "MIN" and "MAX" marks located on the translucent battery case. If there are no marks, the electrolyte level should be 5–10 mm above the upper edge of the separators.
Note: It is convenient to check the electrolyte level above the upper edge of the separators with a glass tube, lowering it into the element until it stops in the separator and closing the free end of the tube with your finger.
To restore the electrolyte level, add only distilled water. If it is determined that the low level is due to splashing, then add electrolyte of the same density as the one remaining in the battery cell. If the level is above normal, pump out the electrolyte using a rubber bulb with an ebonite tip.
Warning! It is strictly forbidden to add concentrated acid to the battery!