How Much Epsom Salt Per Gallon for Battery? (Myth Busters)

Published on: September 8, 2022
Written by Jonas Frank / Fact-checked by Nova Scarlett

Epsom salt is a popular home remedy for many ailments, including constipation and sore muscles. But did you know that it can also be used to prolong the life of your car battery? That’s right – adding just a few tablespoons of Epsom salt to each gallon of water in your battery can help it last up to twice as long.

Like most people, you probably have a bottle of Epsom salt sitting in your medicine cabinet. But did you know that Epsom salt can also be used to clean battery terminals? Just mix up a solution of one tablespoon of salt per gallon of water and use it to scrub the terminals.

how much epsom salt per gallon for battery

The acid in the salt will help break down any corrosion that’s built up on the terminals, and the Solution is safe for both lead-acid and lithium-ion batteries.

If you want to learn more about Epsom salt, keep reading the article.

How to Make Battery Electrolyte Solution?

Making your own battery electrolyte solution is a great way to save money and be more self-sufficient. Plus, it’s really not that difficult to do! Here’s what you’ll need:


1) Distilled water

2) Battery acid (sulfuric acid) – This is found at most auto parts stores.

3) A glass or plastic container to mix the Solution in (a funnel can also be helpful)

4) A stirring rod or spoon

5) A ph test kit is optional but recommended, so you can ensure your Solution is the correct strength. Ph test strips can also be used.


Step NumberInstruction
First stepTo make the battery electrolyte solution, simply mix equal parts of distilled water and battery acid.
Second stepThen use the funnel to pour the mixture into your container, then stir well with the rod or spoon.
Third stepUse the funnel to pour the mixture into your container, then stir well with the rod or spoon. Test the ph of the Solution with your kit or strips and adjust as necessary – aim for a pH between 1 and 2.
Step by step to make battery electrolyte solution

That’s it! Your homemade battery electrolyte solution is now ready to use.

Epsom Salt Battery Myth Busters

Epsom salt is often touted as a battery-saving miracle product, but does it really work? We put the Epsom salt battery myth to the test!

The idea behind using Epsom salt to save batteries is that the magnesium sulfate in the salt will help reduce corrosion and extend the battery’s life.

While this may sound like it makes sense, no scientific evidence supports this claim. In fact, most experts agree that Epsom salt has no effect on batteries whatsoever.

So if you’re looking for a way to prolong the life of your batteries, don’t waste your time with Epsom salt – there are much better ways to achieve this!

How to Make Sulfuric Acid from Epsom Salt?

Epsom salt is a great option if you’re looking for a quick and easy way to make sulfuric acid. All you need is some access to heat and a few simple supplies. Here’s what you’ll need to do:

  • First, heat up your Epsom salt in a container. You can use a Bunsen burner or another type of heat source for this.
  • Once the Epsom salt has melted, pour it into an Erlenmeyer flask or another type of container.
  • Add water to the flask until it’s about two-thirds full. Then, add concentrated sulfuric acid slowly while stirring the mixture.

What is the Difference Between Battery Chemistries?

When it comes to choosing battery chemistry, there are many options out there. But what is the difference between battery chemistries? And which one is right for your application?

Three main types of battery chemistries are lead-acid, nickel-cadmium (NiCd), and lithium-ion (Li-ion). Each has its own advantages and disadvantages.

Lead Acid

Pros Cons
Lead acid batteries are the oldest type of rechargeable battery. However, they are also heavy and can be damaged by overcharging.
They are inexpensive and have a long life span.
Pros and cons of lead acid

NiCd Batteries

NiCd batteries are lighter than lead acid batteries and can be charged more times before they need to be replaced. However, they are more expensive and can be damaged by heat or overcharging.
Pros and cons of NiCd batteries
Li-ion batteries are the newest type of rechargeable battery. However, they are also the most expensive type of battery chemistry.
They are lightweight, have a long life span, and can withstand high temperatures without being damaged.
Pros and cons of Li-on battery

Battery Acid Refill

When you think about battery acid, you probably think of the corrosive substance that can eat through metal and skin. But did you know that this same substance can be used to recharge your car battery? That’s right – battery acid can actually be used to give your car battery a boost.

So How Does It Work?

Well, when your car battery is running low on power, adding a bit of battery acid can help to “top it off” and get it back up to full strength. Of course, you don’t want to just pour the acid directly into the battery – that would be very dangerous.

Instead, you’ll need to use a special charger to mix the acid with water to create a safe solution. Once you have this Solution, simply hook up the charger to your car battery and let it do its job. In most cases, it will only take a few minutes for the charger to replenish the battery with enough power to get you going again.

How to Make Battery Acid?

Are you looking for a way to make battery acid? If so, you’ve come to the right place! This post will show you how to make battery acid using household items.

First, you’ll need some supplies. For this project, you’ll need :

1. vinegar

2. Salt

3. Water

4. And a container.

You can find all of these items at your local grocery store.


Follow the step-by-step guide to make battery acid at home.

Step One

First, mix together 1 part vinegar and two parts water in your container. Add one tablespoon of salt for every cup of liquid. Stir until the salt is dissolved.

Step Two

Now it’s time to add your batteries! Place each battery in the Solution to submerge the positive and negative terminals. Let the batteries soak for at least 24 hours.

Step Three

After 24 hours have passed, remove the batteries from the Solution and discard them safely. Your battery acid is now ready to use!

How to Bring a Dead Lead Acid Battery Back to Life?

We all know how frustrating it is when we go to use our car or truck, and the battery is dead. Often, we think the only solution is to buy a new one. But did you know that you can actually bring a dead lead acid battery back to life?

With just a few simple steps, your Lead acid battery can charge again like new in no time! Here’s what you need to do:

Remove the Battery from Your Vehicle?

Make sure it’s completely disconnected before proceeding. 2. Clean the terminals with a wire brush or sandpaper. This will help ensure good contact when you reconnect the battery.

Use a Hydrometer

Using a hydrometer, check each cell of the battery for specific gravity. If any of the cells are below 1.265, they need to be recharged before proceeding. You can do this by connecting the charger’s positive terminal to the cell’s positive terminal and then connecting the negative terminal of the charger to a good ground (like an engine block).

Charge Each Low Cell to a Specific Gravity

Next, Charge each low cell until it reaches 1.265 specific gravity, then move on to step 4. 4. Once all cells are at or above 1.265 specific gravity,

Reassemble Everything

it’s time to start reassembling everything! Reconnect your battery terminals, ensuring they are nice and tight so there is good contact between them and your vehicle’s electrical system.

Now put everything back together and try starting your car or truck if it starts right up. Great job! You just saved yourself some money by reviving your old lead acid battery!

how much epsom salt per gallon for battery

How Do You Mix Epsom Salt And Distilled Water for Batteries?

Epsom salt and distilled water can be used to mix a battery. This is a great way to make your own battery at home without going out and buying one. You will need:


  • 1 cup of Epsom salt
  • 1 gallon of distilled water
  • A funnel
  • An airtight container
  • A wooden spoon
  • A 9-volt battery (or any size you need)


  1. Pour the Epsom salt into the funnel and add it to the distilled water. Stir until the salt has dissolved completely.
  2. Pour the mixture into the airtight container using the wooden spoon. Make sure that there are no bubbles in the mixture.
  3. Submerge the 9-volt battery in the mixture, ensuring that both terminals are covered with liquid.
  4. Allow it to sit for 24 hours so that it can charge fully.

How to Make Battery Epsom Salt Solution?


Epsom salt is often used in battery acid solutions to help maintain the correct level of acidity. The amount of Epsom salt needed per gallon of battery acid solution will vary depending on the type and size of the battery, as well as the temperature and other factors.

Generally, it is recommended to use 1-2 teaspoons of Epsom salt per gallon of battery acid solution.

Frequently Asked Question

How Much Epsom Salt Do You Put in Battery to Rejuvenate It?

Epsom salt can be used to rejuvenate a battery by adding it to the water in the battery cells. The amount of Epsom salt needed will vary depending on the size and type of battery, but a general rule of thumb is to add one tablespoon per gallon of water. Be sure to use distilled water when adding Epsom salt to a battery, as tap water can contain minerals that can damage the battery cells. If you don’t want to fix your old battery, you can sell it to Walmart.

How Much Epsom Salt Do You Put in a Gallon of Water?

Epsom salt is a mineral compound consisting of magnesium sulfate. Its name comes from the town of Epsom in Surrey, England, where the compound was first discovered in the spring. The typical dose of Epsom salt is 1-2 cups in a bathtub full of water.

You would need to use 1-2 cups of Epsom salt for a gallon of water.

How Do You Mix Epsom Salt for Batteries?

Epsom salt is a great way to mix batteries. It is a natural compound that can be found in many household items, such as toothpaste and shampoo. When mixed with water, it forms a solution that can help to restore the charge in lead-acid batteries.

The ratio of Epsom salt to water will depend on the type of battery being used, but generally, one tablespoon of salt per gallon of water is sufficient. Be sure to fully dissolve the salt in the water before adding it to the battery cells.

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