Why Is My Battery Leaking Acid. The steam pools on the surface of the battery making the unit look like its sweating. The only time a battery will leak water is when you overfill it when you top it off with distilled water.

You most likely know what the smell of a rotten egg is like. It reacts with other substances and you get battery terminal corrosion. Here are some common reasons why car battery leaking acid from top-1.
Better check your charger and take the battery to the auto parts store they will load test for free.
This will leak out forming a white fluff of potassium carbonate. The acid that is found inside the battery is sulfuric acid. Apparently the positive end is vented better. There are moments that the hydrogen gas in the battery leaks and finds its way into the atmosphere.
