Can Bottled Water Be Added to a Battery – Safe or Not – 2023

A battery cannot perform appropriately without water. The kind of water used in batteries matters since it impacts how well the battery works.

Distilled water should be used; bottled water is generally free of any substances that would harm a car battery.

In this article, we will discuss which kind of water can be used and when and how to top off the car battery with water.

What Kind Of Bottled Water Can Be Used In Batteries?

To avoid harming the battery cells, the water used in batteries must be distilled or deionized. Minerals, such as sulfates, chlorides, and other pollutants, must be absent from the water.

The kind of water used in batteries matters since it impacts how well the battery works. The water needs to be distilled or deionized to keep the battery cells from becoming contaminated.

What Kind Of Bottled Water Can Be Used In Batteries

Since distilled water doesn’t include calcium, iron, or other minerals, it is a better option for extending battery life. It contains minerals and other chemicals that can harm your batteries when in contact with tap water. It is essential to keep your distance from a car’s battery.

In addition to routine maintenance, it’s crucial to look after your car’s battery. Your battery must receive water at the proper time and location. The battery will require more water in hot weather than in other conditions. Ensuring the battery is completely charged before a battery outage is essential.

Can I Use Bottled Water To Top Off My Battery?

Distilled water should be used; bottled water is generally free of any substances that would harm a car battery.

They still contain the same impurities as tap water, such as chloride, which could damage your battery, even though they might be a better drinking option.

Tap water has minerals that might damage the battery if used as a replacement. Distilled or demineralized water is the best option for automobile batteries. 

 A bottle of bottled water should not be used for drinking, whereas a bottle of distilled water should not be used for drinking. Consider drinking bottled water if you become stranded or your car battery dies.

All minerals and bacteria have been removed from the water, leaving just pure water. Both water from desalination and reverse osmosis processes undergo deionization. On tap water, a significant number of contaminants might reduce battery efficiency.

Can I Use Tap Water To Top Off My Battery?

It might be harmful to your battery to fill a lead-acid battery with tap water. It is because most tap water contains contaminants like chlorides and chemicals that can harm the internal parts of the battery.

Can I Use Tap Water To Top Off My Battery

The high metallic content of most tap water, in particular, might obstruct the chemical reactions inside the battery to produce energy. Additionally, as these substances dissolve in the battery fluid, they may cause sulfation, a type of corrosion.

As a result, the power output is decreased, and the battery life is also decreased. It holds for bottled water as well, including spring or filtered water.

How To Check If My Battery Needs Water?

Before testing, ensure your battery is completely charged. You must take the vent caps off each cell after it has been charged. Ensure you don’t get any electrolyte solution on your hands or clothes.

Lead acid batteries typically have one of three low, normal, or maximum electrolyte levels.

The solution is so dilute at the low electrolyte level that the lead plates are entirely exposed. If so, more water must be added to guarantee that your batteries are operating correctly.

Just enough liquid is present at the regular electrolyte level to completely cover the lead plates. Once you reach this point, it’s crucial to avoid adding more water because doing so can obstruct the appropriate electrical movement within your battery cells.

How To Check If My Battery Needs Water
source:batteries plus

And finally, there is sufficient electrolyte at the highest level to submerge all lead plates in your battery cells completely. You should be able to precisely and efficiently check the levels of your lead acid battery solution using the information provided here.

How To Top Off The Water In Your Battery?

It is now time to refill your battery after checking the fluid levels. To keep your battery supplied, you must be cautious when replenishing it. Overfilling your battery might harm it just as much as submerging it.

1. Start With The Charged Battery:

You must confirm that your battery is charged before adding water, like when you checked your fluid levels. If your battery isn’t fully charged, adding water could lead to several problems.

Start With The Charged Battery

The extra power that leaks from the terminals could endanger your safety or harm your car’s battery or other parts. Water can also cause the low-charge battery can destabilize the electrolyte, which can damage the cells and cause corrosion.

Ensure your battery is completely charged before adding water to avoid these issues.

2. Check The Plates For Build Up:

Next, check to see if the battery’s plates have accumulated anything. If there is, you must clean the batteries first with a baking soda and distilled water solution before adding water.

When your battery is clean and dry, use an insulated screwdriver or wrench to pry off the plastic caps covering the battery cells.

3. Add Water To Your Car Battery:

Pour distilled or deionized water into each cell using a funnel gradually until it reaches the appropriate spot on the water level indicator.

Add Water To Your Car Battery
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Before utilizing your battery for anything crucial, be careful to replace any caps that were taken off during this procedure. By adhering to these easy instructions, You can easily ensure that your lead acid battery always remains hydrated and ready for use.

How Much Water Do You Put In A Battery?

The water level should be tested before charging to ensure there is enough water to cover all exposed plates, even though a battery should only be filled after it has been fully charged. After charging, add enough water to fill the vent at the bottom, which is located 34 degrees below the top of the phone.

One part water and one part fill tube in a wet-cell battery should be positioned 1/8 to 1/4 inch below the bottom of the fill tubes extending downward from the battery’s entrance. Utilizing distilled water to fill in any low-level water gaps is essential.

How Much Water Do You Put In A Battery

The rectangular plates holding the batteries in place can be removed to access the battery cells. Change the battery cap arrangement on the golf cart battery and replace the cap plate on any automotive or marine batteries.

A wet paper towel or disposable cloth should be used to clean up any battery acid spills or droplets. If it’s not already connected to your vehicle, you can plug your charger back in. For an accurate reading when testing the water, keep the fill line attached and do not hold the hydrometer at an angle.

You may try to do it twice as often if you only do it once a year. If you do it frequently, you can speed up the process and reduce the required cleaning.

Will Purified Water Work In A Battery?

Although water can function as a battery, some materials are more efficient than it is. A battery can be built with purified water, but it will perform better than one made with salt water.

Batteries can be poisoned by various pollutants in water that have been artificially “purified” and become useless. It is impossible to bring distilled water in to benefit your battery banks. Although sodium is a component of softened water, it is not the best substance for batteries.

Will Purified Water Work In A Battery
source:chemical suppliers

The main problem with soft drinks is that they don’t contain any minerals. However, distilled is the finest choice. If you need help finding distilled wine, look for anything that has been reverse osmosis purified and hasn’t had any flavor-enhancing minerals added. Nearly as pure as distilled water is RO water.

Drinking water that still contains mineral deposits is not recommended. Using rain as an energy source is the most effective technique to remove rainwater from a roof. Before cleaning it with some clean materials, let it sit for a couple of days.


1. How Often Should I Check My Battery Fluid Levels?

There is no universal standard when determining the electrolyte levels in lead-acid batteries. For instance, it can be sufficient to check your battery’s electrolyte levels once a month to ensure it stays full if you only drive a few miles each day or frequently take short journeys.

2. What Kind Of Batteries Need Water Added?

The most common type of battery that requires a water top-up is a lead acid battery. An electrolyte solution, a liquid that flows through the battery cells to help in energy production, is present in lead-acid batteries.

3. Do AGM Batteries Use Water?

AGM batteries are used in the majority of modern standard cars, and they do not require the addition of water. The term “AGM,” which stands for “absorbent glass mat,” describes the unique design of these batteries. There is no need for routine maintenance or top-ups.

4. Can I Use Purified Water Instead Of Distilled?

Both distilled and purified water have similar health advantages. Removing some of the beneficial minerals from purified water is not necessarily the case with distilled water, a critical difference between the two, so only use distilled water for your car battery.


Bottled water cannot be used to top off the car battery because it has some impurities that can damage it. You should use only distilled water for lead acid batteries because lead acid batteries are the most common ones requiring water after some time. While topping up the water, you must follow the abovementioned steps to avoid mishaps; don’t overfill the distilled water. Feel free to contact us if you have any confusion; we will be happy to help you.

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