What happens if I use regular water in my batteries instead of distilled?

Question

What happens if I use regular water in my batteries instead of distilled?

Answer 1

If your water is relatively soft and iron free it is no problem.

If you have hard water or heavy iron content in the water it will greatly reduce the battery life.

Answer 2

usually nothing will happen but it could shorten it's life a little.

Answer 3

had a friend used well water once when I jump started his car for him his battery exploded and blew battery acid all over my car! $1300 to fix my paint