How To Recondition A Car Battery? Step-By-Step Guide In 2023

Who Makes Interstate Batteries

Did you know? Car batteries are used for starting the engine of your car. It is not required for the operation of the car, but it will make the engine start without any problem.

If the battery is not working, then your car will not start.

So, if you want to drive your car, you need to make sure that the car battery is working. Reconditioning a car battery is an important topic since it is an important part of the car.

How to recondition a car battery? Get some tips here!

How To Recondition A Car Battery at Home?

The process of reconditioning a car battery at home is not difficult if you follow the instructions correctly. I’ve been car-less for a while now and was thinking about how I might learn to recondition a car battery at home.

” I’ve heard about how to do it, and although I’ve never tried it, I thought it’d be a cool project to take on.

After I get a bunch of batteries, I’ll write a blog post about them and what I’ve learned. This blog post will be a bit of a teaser as to what the blog post will entail, so I’ll have something to link to when I’m done.


  • Toothbrush
  • Flathead screwdriver
  • Funnel
  • Two large buckets
  • Protective wear
  • Steel wool or battery terminal cleaner


  • 1 pound of baking soda
  • 1 pound of Epsom salt
  • A gallon of distilled water

Items Of Interest:

  • Voltmeter
  • Battery charger

This Guide Will Show You How To Recondition A Battery Step-By-Step:

1. Create a Cleaning Solution:

Battery and Voltmeter.
Source: architecturelab

To create a runny paste, mix baking soda with water 2 to 1.

The mixture can be used both as a battery cleaner as well as a cover-up for acid spills.

2. Clean The Battery:

Corrosion on the battery terminals can be removed with a cleaning paste (or a dedicated battery cleaning product) applied to the posts and scrubbed with the toothbrush. When the paste foams, the solution is working.

If the battery is heavily corroded, use steel wool. Make sure the terminals are completely dry after cleaning and wiping.

3. Verify The Voltage:

Verification of Voltage.
Source: znioda.easttotalyellow

Plug in the voltmeter. A red cable connects to the positive terminal, whereas a black cable connects to the negative terminal when jumping starting a car.

Six cells produce about 2.1 volts each in a standard car battery.

Hence, a healthy battery will measure 12.6V. The battery can recondition if it measures between 10V and 12.6V. Replace the battery if it measures less than 10V.

4. Empty The Battery Cells:

So far, the vehicle’s battery has not needed to be removed. Therefore, You will need to do this now.
But, firstly, make sure you have a bucket and half a pound of baking soda on hand. With the flathead screwdriver, remove the battery cover and the cell caps underneath.

Pour the contents of each cell into a bucket one by one. When all the cells are empty, you can add baking soda.

In either case, it neutralizes the battery acid so it can be disposed of safely at any facility that accepts hazardous waste, like a recycling center.

5. Clean The Battery Cells:

The cleaning solution should pour into each cell with the funnel. Reinstall the cell caps and battery covers securely. Give the battery a good shake. The mixture should be disposed of in the existing old-acid waste bucket.

6. Replace The Battery Cells:

Replace The Battery Cells

Replace battery cells by mixing 4 cups of water with 4 ounces of Epsom salt.

Stir the mixture until clear. It is not necessary to boil the water.

The electrolyte solution should be filled into the cells with the funnel.

Cover the cells and re-shake to distribute the salt evenly.

7. Recharge The Battery:

Recharge The Battery.
Source: wikihow

Do this step slowly and low, as you would for a good brisket. Prepare your area safely and securely.

During charging, remove the battery caps again to prevent the electrolyte solution from overflowing.

It is recommended that you place the charger as far from the battery as possible and connect it at the speed of 12 volts / 2 amps. Allow the battery to recharge for 36 hours.

8. Test The Battery:

Check the battery’s condition using the voltmeter after disconnecting the charger. Normal readings are about 12.42V. If yours is lower, charge it again for another 12 hours.

Perform a load test by reinstalling the battery and turning on your vehicle with the high beams on. While the battery is under load, test it again a few minutes later.

If the voltmeter shows 9.6V, you’re good to go! Your car battery has been successfully reconditioned.

Does Reconditioning A Car Battery Work?

Longer recharging periods, worse effectiveness, and reduced charge capacity are all consequences of having more crystals.

Reconditioning, or refurbishment, a battery removes these sulphates, replaces the electrolyte inside, and enables it to recharge and perform like new.


When your car’s battery is dead, you need to get it replaced. But, before you get it replaced, you should get it reconditioned, at least if it is still in good condition. Reconditioning a car battery isn’t that hard, and the benefits of doing so are worth it.

I hope from this article about how to recondition a car battery; you will understand the ways to recondition a car battery at home. But, please take caution before attempting to recondition a battery.