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How To Recondition A Car Battery In 5 Easy Steps

Car battery is one of the most expensive equipment that you would wish to be in a better condition for a long time. A bad battery replacement might cost a lot but not when you have an effective DIY recondition a car battery solution. Yes, you read it right! You can recondition the car battery easily with our fail-proof method.

So, let’s explore the entire procedure right now!

Use A Nifty Way To Recondition A Car Battery

No rocket science is involved to recondition your car’s battery. Just follow a complete procedure and do it yourself every time.

Needed Equipments

  • Battery Charger
  • Neoprene Chemical Resistant
  • Safety Googles and gloves
  • Flathead Screwdriver
  • Plastic Funnel
  • 1 Gallon of distilled water
  • Plastic Bucket
  • Voltmeter
  • 1lb Baking Soda
  • Optional Battery Post Cleaner

The Procedure

Step 1. Reconditioning Groundwork

At the initial stage, cleaning the corrosion is vital. Use readymade posts cleaner or make your own solution to clean the terminals of the battery. You can pick any available posts cleaning product in the market. To make your own solution, mix 2 teaspoons of baking soda and 1 spoon of water. Mix it well until you see it transforming into a fine paste. Now, take a toothbrush and rub it on the posts. For heavy corrosion, you can use a steel wool as well. This is the first step towards recondition a car battery in the right way.

If your battery has a heavy corrosion, either using 300 grain sandpaper or steel wool is the great choice.

Note: Don’t forget to wear safety equipment like gloves and goggles.

Step 2. Verify The Battery Voltage

The voltage tester voltmeter is the best choice with the help of which one can get the correct parameters of power. There’s no rocket science to check the voltage, just connect the voltmeter with the battery terminals and you are good to go.

How to Recondition a car battery
Guide About Recondition a car battery

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If the readings are 12.6 Volts, the battery is in good condition, and if it’s more than this, reconditioning is surely needed. If it’s between 10 and 12 volts, you can restore the battery to full function. In the other hand, there is less than 10 volts, you’re probably wasting your time. There might be chances that you see zero readings. This indicates that the battery has gone through a short circuit. This is the time when you should use your maintenance tips or just contact the mechanic to handle the situation in a right way.

Step 3. Take Out The Acid

After successfully checking the voltage, it’s time to take out the old acid from the battery. With the help of flat-head screw, reach to the battery caps. The caps may vary from two to six. Remove all the caps but make sure that you have a container or bucket near you. Pull out the acidic liquid into the bucket. In case you spill out acid, use baking soda to neutralize it.

Note: Acid inside the battery is dangerous so make sure that you are wearing all the security equipment.

Step 4. Put Back The Battery Into Working Order

Now that you have cleansed acid from the battery, it’s time to recondition it. For that, you have to refill the cell with electrolytes. The electrolyte is normally made of Epsom salt and distilled water. This will let your battery charge pretty well and avoid sulphating. Now, pour it into the battery.

Step 5. Finally, Charge The Battery

The last step is to check whether the entire reconditioning process is working or not. It’s not recommended to put the caps back on the battery as the electrolyte may overflow during charging. So, grab the battery charger, connect black (negative) lead to the negative terminal and red (positive) lead to the positive terminal. Keep the charging speed somewhere around twelve v/ two amp. Keep on charging at least for a day or 36 hours. Take the charger away and take readings through the voltmeter. Normal readings will be 12.42V. You can also go for the battery load test if you want. Otherwise, you are all set for the efficient car battery.

Recondition a car battery steps
Points for Recondition a car battery

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So, here you have successfully completed the task of recondition a car battery. Don’t forget to wear safety goggles, gloves, and other important things.

Tips And Warnings When Reconditioning Car Battery


Unless you use car batteries for few weeks or longer, put them on a trickle charger to restrict loss of performance. A stored battery gradually loses its charge, allowing sulfur to form on the lead plates.

To restore the battery to maximum capacity, put it on the charger for three or four nights.


Should not use tap water because it contains chemicals that will harm for a battery

Car batteries contain sulfuric acid that is very dangerous. Work only un a well-ventilated area and don’t have open flames nearby. Wear safety goggles and rubber gloves. In unfortunate case, you get acid on your skin, irrigate it with water immediately.

Alternatives To Epsom Salt Battery Reconditioning

Normally, Epsom salt is used because it gives the best results. However, there are few alternatives to Epsom salt you can try to battery reconditioning.

Aluminium Sulphate

You can mix 1 lb of Aluminium sulphate with 1 gallon of boiling distilled water. Stir this mixture until it’s as clear as possible. Then, you fill the cells with the solution and charge the battery. As the result, the battery charges faster thanks to the electrolyte produced from Aluminium sulphate.

Copper Sulphate

Copper Sulphate is another battery reconditioning substitute. From our experience, although it works, it isn’t effective as Epsom salt which is always the safe choice.

To know more about how to recondition a car battery, check the video below:

Hopefully this article may useful for you, if you have any question, feel free to leave our auto experts a comment in the box below, we will answer it for you.