
How to revive a dead car battery with epsom salt for this method to work you will need epsom salt (at least 4 tablespoons) and distilled water. additionally, you should have rubber gloves and a screwdriver , but also a measuring spoon to make sure you get the salt quantity right.. How to desulfate a battery with epsom salts. by nicholas smith . measure 7 to 8 oz. of epsom salts. heat 1/2 quart of distilled water to 150 degrees fahrenheit. test the boiling temperature using your thermometer. pour the epsom salt into the hot water and let it dissolve....