And as a side note : (just a FYI reminder)

Always remember to charge the battery FIRST, THEN add distilled water to "top it off". BUT, don't charge the battery IF the fluid level DOES NOT COVER the lead plates ... add just enough distilled water to cover the plates, THEN charge the battery and top it off (if necessary). DO NOT fill battery up to where the fluid is in the cell fill tubes, as charging will cause the fluid to expand ... and it may overflow out of the fill tubes.

ALWAYS use distilled water, NOT tap water ... as tap water has chemicals in it that may degrade the battery's performance & charging capacity.