A temporary fix to a permanent problem. Waste of time and money. As a general rule the only things you should ever put into a battery
are acid and distilled water. Even ordinary tap water is not recommended because it has dissolved minerals in it, which over time, will ruin your battery
. I can't imagine that adding anything else, especially a salt of all things, to a battery
can do anything less than destroy it. Don't believe everything you see on the internet...