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Distilled water containing 29% to 32% sulfuric acid.

only distilled water should be added to a lead acid battery. due to normal use, the battery will heat and cool, causing the water to naturally aspirate. that is why there are vents on the battery top. only the water evaporates from the battery, so there is no need to add any sulfuric acid. the acid is still there. adding acid will only cause the chemical balance in the battery to shift. this will either make the battery weaker, or most commonly complete make the battery unusable. you want to use distilled water because the impurities that shorten your batteries life are less prevalent, and that'ts the idea to extend you battery's life.

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13y ago

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