How to rebuild a lead acid battery And Restore Your Car Battery Life

How to rebuild a lead-acid battery or restore a car battery? How to make lead-acid battery repair or how to fix a dead battery? These are all the questions that people with battery issues have in mind. Well, to fix this major common problem, a completely comprehensive guide; EZ Battery Reconditioning is already available. But, to provide you with something to try on your own, we have created this small guide:

How to Bring the dead lead acid battery back to its life and make old batteries work like new? Learn How to restore a dead car battery...?

Wondering how to rebuild a lead-acid battery or how to restore car battery? Well, we can help you with that. With just four easy to follow steps, you can pull off a lead acid battery repair even if you are not a certified electrician. So before we start, here are a few things you will need:

  • Syringe (3cm)
  • Multimeter or Voltmeter
  • Power supply or a battery charger
  • Crocodile cords that are used with a PSU
  • Distilled water

Note: DO NOT TOUCH THE LIQUID COMING OUT OF THE BATTERY IT IS ACID. Also, use chemical gloves and goggles for your protection.

Okay so now that our arsenal of lead acid battery repair is complete, let’s start working on its repair:

Step #1: Ready the Battery

The first step to knowing How to rebuild a lead acid battery, is to first prepare your battery. You will find a cover at the top of your sealed lead battery.

Remove that cover and then you will find three rubber caps covered holes.

Remove the caps and then measure the volts of your battery which will be less than the actual volts of your battery that are around 12V in a car battery.

Step #2: Fill it With Water

Now you will have to put the distilled water inside your batter to reactivate its acid.

So refill the holes using the syringe until you see the water coming out from all of the holes.

Remember; do not touch the water; it can be acid. Now again measure the volts of your battery, it should show an increase.

Step #3 Acid Mixing:

Now after you have filled the holes with water, you need to make sure that the water has mixed with the dried acid of your battery and is fully reactivated.

So first, you will have to charge the battery with a 12v DC charger. Wait for 5 minutes, and you should see some bubbles coming out of the holes.

If there are no bubbles in any of the three holes, then reverse the positive and negative and then wait for 3 minutes max. Do not leave the battery in this condition because it is a very dangerous step.

Now within three minutes, you should see some bubbles coming out too fast. Cut the power quickly and make the connection right again (negative to negative and positive to positive).

Step #4: Charging the battery

Now is the final step, congratulations on making it to this step successfully. Now you just need to suck out all the water that is wasted in the three holes through a syringe and let the battery charge.

Do not cover the three holes until your battery is charged to 6.9 volts which you can check for after every hour.

Once the battery is charged, dry the extra water on the holes if there is any with a tissue and cover the battery. Your battery should be working fine now.

So now you know how to rebuild a lead acid battery, but if you find anything mentioned here a little hard to understand and want something that is more detailed, you should definitely give EZ Battery Reconditioning a try. You can learn all the tricks and tips when it comes to reconditioning your battery.

Rejuvenate car battery with vinegar - How to recondition a car battery that won't hold a charge?

Another excellent approach to restore car battery using vinegar. Though you can find a detailed guide with all the diagrams in the EZ Battery Reconditioning guide, here are a few short steps to doing so:

The first place you visit should be the auto part store so you can have your battery tested. If you still want to learn more about reconditioning your battery, you can always try out the EZ Battery Reconditioning course.

Sealed lead acid battery maintenance:

Before trying to keep your car battery maintained, it is imperative that you learn about your battery. Know the exact system voltage, energy requirements, and size of the battery compartment. Furthermore, you should know the type of acid battery used.

Know the exact system voltage, energy requirements, and size of the battery compartment. Furthermore, you should know the type of acid battery used.

Make sure to store your battery in the temperature of 15 degrees Celsius so they can stay in good condition for a long time. Moreover, check your batteries regularly to ensure they are getting properly charged.

Use a hydrometer for this purpose to know where the battery stands in charging. Letting your battery discharge is the fastest way to ruin it.

Lastly, check the level of water in the wet-cell batteries after every three months and fill each cell with distilled water to make sure they have enough electrolytes to function properly.

How to desulfate a lead acid battery with chemicals?

  • Take the battery out and remove its cap.
  • Now drain each cell of the battery using a syringe or a dropper and leave the cells 50% filled.
  • The liquid you have drained is acid, so dispose of it carefully.
  • Make a saturated solution of Epson salt and distilled water. Boil the water and keep on adding more salt to it and keep stirring the solution until there is no room left for more salt.
  • Now take the liquid solution of distilled water and Epsom salt in a syringe or dropper and put it in each cell of the battery until they are full.
  • Once done, connect the battery to the charger and let it charge completely. Make sure to leave the cell caps open as it will release some gas.
  • Once charged, put the cover back, put the battery back in the car and jump start it. Go for an hour of the ride and let the battery charge through the alternator.

Where to buy sulfuric acid for batteries?

This is a tough one because there are no places that sell concentrated Sulfuric acid to common people. Usually, motor traders and mechanics have access to them so you can ask them to provide you with some.

The reason for this is because the acid is very dangerous and there is a risk of an untrained person injuring themselves.

So, the better, easier and money-saving alternative is to make the sulfuric acid at home. Have a look at how to do it below.

How to make sulfuric acid from scratch? In these few steps, you will Learn How to make battery acid at home?

  • Firstly, you will need the non-concentrated sulfuric acid which is not as dangerous as the concentrated one. You can get it from an automotive supply store.
  • You need to turn it into concentrated sulfuric acid to be able to use it in a battery. So for that, first put it in an open container at a good circulating place and make sure it doesn’t spill.
  • Now cover the container and leave a little space open so that dust or other particles do not go inside it.
  • Now just wait for the water in the non-concentrated acid to evaporate. There will still be some water left in the end, and you can heat up the solution to derive that remaining water out.

How to know what car battery to buy?

Whether you are getting reconditioned car batteries or now one, consider the following points:

  • Get to know different types of batteries to get the right one
  • Make sure it fits your car
  • Ask for cold cranking amp
  • Ask about the reserve capacity
  • Make sure it is fresh and no more than six months old
  • Get the battery with the longest period of free replacement

These things are the most common ones when getting new or reconditioned car batteries. Make sure to keep them in mind.


The information on how to rebuild a lead acid battery provided above can also be found in great detail and diagrams in the EZ Battery Reconditioning guide. The guide contains a step by step course to help you restore car battery or make lead acid battery repair by using the tools you already have in your home.

And the best thing about this guide on how to fix a dead battery or to make reconditioned car batteries is that you don’t have to be an expert or even a beginner. You will learn everything from scratch on how to bring life to your battery in the EZ Battery Recondition Guide.

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