one thing I never knew and just found out in renewing a car battery
Most car batteries today are reliable and can last longer, but when they get weak it is usually due to sulfation which occurs when lead electrodes in the battery get coated with sulfur from the sulfuric acid electrolyte. The main cause of sulfation is continuous deep discharges which then runs the battery down. There are many ways for reversing the sulfation, providing that the sulfur hasn’t corroded the lead plates too bad. Probably the simplest and the least expensive way requires only a common household chemical and a good quality battery charger made for use with car batteries.
loosening the battery cables remove the battery from the car. Make sure to Work in a well ventilated area and always wear gloves and safety glasses when working with lead acid batteries. Keep open flames away from the work area also.
Then, remove the cell caps on top of the battery (If it’s a sealed battery), locate the entry points (called shadow caps) marked on top of the battery and use a drill to punch through them. Drain the battery fluid into anon-metallic container.
Mix a solution of 15 percent to 20 percent by weight of magnesium sulfate (better known as Epsom salts) and water–about 7 oz. of Epsom salts to 1 qt. of water). Using distilled water because tap water sometimes contains chemicals harmful to batteries. When the Epsom salts are completely dissolved, fill each cell of the battery with the solution.
Then Charge the battery using a 3-phase “smart” charger set to 12 volts. These chargers are designed to provide optimum charging with an initial “bulk” charge followed by a slower absorption charge and finally a trickle or “float” charge. Make sure the charger is turned off and follow manufacturer’s instructions for connecting the battery to the charger. Turn the charger on and allow the battery to charge overnight.
Food for thought remember this for the future, I am going to try it,
Good Luck !!!!