How to Refurbish Car Battery – a Step-by-Step Guide! with FREE COURSE!

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What is Battery Reconditioning?

Battery reconditioning returns an old or dead battery cell to its original capacity.

The battery getting dead is when the battery cell goes bad or dead in the negative or positive channels. Reconditioning a car battery is not that expensive. Many people prefer it over purchasing new batteries because it saves costs. And again, it is environmentally friendly because it helps remove used, old and dead batteries from your home and then recycle them as new. The excellent news is that a reconditioning battery has about 70% lifeSpan as a new battery, and that is much more than your car needs.

The lifespan of a new battery is up to five years, but that of a refurbished battery takes 1 to 3 years.

The idea of battery refurbishing is to restore its capacity as it used to be.

Need more information on how to recondition old batteries? Take this BATTERY RECONDITIONING COURSE

How to Recondition a Car Battery at Home

Reconditioning car batteries do not need technical know-how before you can achieve it. And doing it at home will help you save money that you may have used in purchasing a new one, help in saving the environment from pollution and also give you additional knowledge about batteries.

All you need to recondition a car battery is a slight caution and some guidance. Caution because the battery solution is acidic.

Listed below are some of the steps required to recondition your car batteries at home.

Some items that are needed before you can commence a battery reconditioning are:

  • Rubber gloves
  • Googles
  • Face mask
  • Screwdriver with flat head
  • Battery charger
  • Funnel
  • Distilled water
  • Bucket
  • Voltmeter
  • Baking soda
  • Cleaner for Battery Terminal
  • Toothbrush

the first step for reconditioning your car battery at home involves:

  1. Since the battery solution is acidic, you will need to protect yourself by wearing your protective gear like Rubber gloves, googled, face mask and mixing a solution of baking soda and water to neutralise any effect in the eventuality of spill and splashes of the battery solution.
  2. Make a paste of baking soda and little water, use the toothbrush to get a little taste of the solution and rub it against the battery terminal to remove corrosion from the terminals.
  3. Use the voltmeter to take the reading of the battery’s volt. If the reading is from 12.6volts and higher, then your battery is still in excellent condition, but if it is from 10 to 12v, then you need to recondition it.
  4. Remove all battery caps using your flat screwdriver, and pour out the old electrolyte from the batteries.
  5. Neutralise the electrolyte by pouring in a solution of baking powder
  6. Fill the battery cells with baking soda solution mixed with water, replace the battery caps, shake the battery for 30 seconds, and pour the solution out and into the neutralised electrolyte from step 5 above.
  7. Put in Epsom salt solution mixed with water in the battery cells.
  8. Charge the battery for 24 to 36 hours on slow charging.
  9. Take the reading of your battery using the voltmeter.
  10. If the reading is 12.6 and above, then you have got your battery back to its good shape.
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The second step of reconditioning the battery using a syringe, distilled water, Voltmeter and battery charger is:

  1. Remove the battery, the rubber that protects the caps, remove the caps as well, remove all the caps in the batteries.
  2. Recharge the battery after filling it with distilled water solution; note: do not put the cap back on after filling it with distilled water; charge the battery for one hour.
  3. Ensure you see bubbles on the holes when it’s charging; if there are no bubbles, exchange the negative and the positive wires, then wait for 2 minutes.
  4. If you see the bubbles, but both the negative and the positive wires are in the correct position and then charge the battery again for an additional 30 minutes.

This process should help rejuvenate your battery, but if it doesn’t, you can also change the acid inside the battery and replace a new acid in addition to the distilled water and then charge them for a few hours again.

ALSO SEE: How to Refurbish Golf Cart Battery

Need more information on how to recondition old batteries? Take this BATTERY RECONDITIONING COURSE

How to Refurbish Car Battery

Why do People throw their Car Batteries Right Away

The primary reason why most people throw away their car batteries right away is mainly that they do not want the stress and inconveniences of using a battery that no longer serves them well.

Using a battery that is not efficient can be stressful, and most people do not have the time or resources to recondition their car batteries to their original state.

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How to Rejuvenate Car Battery with Vinegar

Using distilled white vinegar can help you in rejuvenating dead car batteries from the inside out; vinegar is low in an acidic liquid naturally. Vinegar should only be used to clean the battery plates, that is, removing corrosion from the battery terminals.

Pouring vinegar into the battery can affect the battery’s lead plate; the acetic acid in the vinegar will react with the sulfuric acid and lead plate, forming a solution of lead acetate, and this is not what we would like if you must replace the electrolyte inside the battery, the only thing that is safe to use is the sulfuric acid. One of the reasons why batteries wear out faster is due to corroded terminals.

E-how suggests using distilled white vinegar to treat rust and corrosion of battery terminals.

Some steps to take to rejuvenate car battery with vinegar is as follows:

  1. Pour some quantity of vinegar over the battery terminals, allow it to stay for 20 minutes and let the vinegar bubble.
  2. The process of bubbling helps in the removal of corrosion that is accumulated in the battery terminals
  3. Use a clean cloth to clean up all the crusted particles and foam surrounding the battery terminals.
  4. Open up the battery cap, make sure the vinegar gets into the open cap area, then fix back the cap back on the battery.
  5. Finally, have the battery charged.

How to Rejuvenate Car Battery with Baking Soda

Baking soda is used mainly in batteries to remove corrosion, corrosion happens as a result of hydrogen gas being released from the sulphuric acid inside the battery.

Corrosion occurs mainly on the negative battery terminal, it is a symptom of undercharging but if corrosion occurs on the positive terminal then it is a result of overcharging.

The following steps are needed when you want to rejuvenate car battery with baking soda includes:

  • First, remove the battery cables, starting from the negative, the negative is black in colour, then remove the positive cable also.
  • Remove battery cable If it’s damaged, then inspect the battery for corrosion
  • Mix baking soda with distilled water into a paste, then use toothbrush to scoop the paste and brush the battery terminals with it to remove corrosion
  • Reconnect the battery cable starting from the positive then the negative.

How to do battery reconditioning with Epsom salt.

Using Epsom salt to recondition the battery is a cost-saving method and will extend and revive the battery life.

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Battery solutions are made from acidic liquids, so to be on the safe side, you will need to put on your protective gear before reconditioning your battery.

Some protective gear you will need to put on include disposable gloves and Google.

Stay in a well-ventilated area with enough water availability before commencing on reconditioning your battery with Epsom salt.

Some materials needed to recondition your battery with Epsom salt include:

  1. Epsom salt
  2. Distilled water
  3. Baking soda
  4. Voltmeter
  5. Battery load tester
  6. Funnel
  7. Flathead screwdriver
  8. Googles
  9. Gloves
  10. Bucket

Procedures for rejuvenating your battery using Epsom salt include:

  • Before starting, put on your protective gear, gloves and goggles.
  • Place the battery on your working table.
  • Make a paste solution of baking soda and distilled water.
  • Use your toothbrush to get a scoop of the baking soda paste, brush the battery terminals with the solution to remove any form of corrosion from the battery terminals.
  • Use sandpaper or steel to remove the corrosion if it is too hard for the brush to remove
  • Using the flat screwdriver, remove the battery cap
  • Pour out the old electrolyte from the inside of the battery by tilting the battery a little.
  • Neutralise the acid from the electrolyte by pouring it into a baking soda solution.
  • Make another solution of baking soda and distilled water, pour it into the battery cell to dissolve the lead sulphate solid in the plate
  • Pour out the solution of baking soda and distilled water from the cell into the mixture of electrolyte formerly removed.
  • Prepare the Epsom salt battery solution by:

a). To make sure all salts are dissolved in water, heat 1/2quarts of distilled water to 66°c.

b). Dissolve 7 to 8 Ounce of Epsom salt into the distilled water and ensure it gets dissolved in the water.

  • Pour the Epsom solution into each cell of the battery, both the negative and the positive cells.
  • Put back your battery caps and secure them.
  • Connect the battery to a charger of 12V car battery and put it in slow charge.
  • Let it charge for 12 to 24 hours.
  • Using the voltmeter, take the measurement of the battey, it should have a battery reading of 12.4v to 12.43V.
  • If it doesn’t dispel all the charge and recharge it again.
  • Finally, place the battery in a load tester.

Epsom solution helps in the desulfation process, that is it helps in reconditioning process by softening the solid salts.

Author: Howard S. Baldwin

My name is Howard S. Baldwin. I am a work-at-home dad to three lovely girls, Jane + Hannah + Beauty. I have been blogging for the last 3 years. I worked for other Home and Lifetsyle blogs, did hundreds of product reviews and buyers’ guides. Prior to that, I was a staff accountant at a big accounting firm. Needless to say, researching and numbers are my passion. My goal is to be an informative source for any topic that relates to DIY life and homemaking.

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