We recently noticed our truck battery was very dirty and corroded. We mixed about four cups of water with six tablespoons (heaping) of baking soda and poured this on the dirty battery. Since baking soda neutralizes acids, this cleaned the battery very nicely.
Picture one is the battery before cleaning. The terminals are heavily corroded.
In the second picture, the baking soda is "bubbling" and neutralizing the acid corrosion on the battery terminals.
After letting the baking soda work for about 5 minutes, we scrubbed the terminals lightly with an old toothbrush, rinsed with plain water, and the battery is clean again! See picture three, above right.
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