There are three types of batteries using these days Dry, Lead Acid and Lithium ion batteries, the least expensive are the Dry and Lead Acid batteries which are commonly using in the vehicles and the only repairable and restorable one is the Lead acid battery unless the battery plates doesn’t gets swelled.
How to reconditioned a car battery at home can be done by using 2 chemicals and distill water, Steps with detail are here as Follows.
Three things required for the Epsom salt battery Recipe.
Distill water with Baking soda
Firstly you have to flush out all old chemical from the battery, A medium size 16 cell plates battery requires less than a liter of water so only use one liter of distilled water pour two tablespoons of baking soda and mix it with water until fully dissolved then put all mix water solution to the battery by using recommended keeve to avoid any harm while filling the mixed solution into the battery.
Wait for 5 to 10 minutes before flushing out this, it helps to clean your battery to the maximum, level and unblocked all cell plates this could be the reason for the battery for unable to charge it properly.
Step-2 Distill water with Epsom Salt
Next step to fill it back with magnesium sulfate with distilled water, and you wonder how and where do I get it, but you don’t need to worry about that, it can be available to almost every retail shopping store with the name of Epsom salt.
How much Epsom salt do you use in a battery?
Mix it with a 1 Liter distill water and two tablespoon or 2 and half tablespoon of Epsom salt and wait until fully dissolved fill it back into the battery and recharge for about 8 hours might be insufficient for some larger plates batteries.
Read More About Lead Acid Car Battery Maintenance Tips and Tricks
It depends on your current battery condition but the average for the battery to work approximately another 2 or 3 months maximum or may be less than this.
Caution:
Here is a complete Video demonstration of how to restore a car battery with Epsom Salt.