Tips Sahabat

The Dangers of Recharging Car Batteries with Acid Water

10 April 2025
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Did you know that refilling a battery with sulfuric acid water is very dangerous? Why? Because sulfuric acid water contains sulfuric acid. The sulfuric acid content can be harmful if it comes into contact with your hands or other body parts.

So what exactly is sulfuric acid water, and is it true that it is dangerous to refill a car battery with sulfuric acid water?

To answer that question, let's take a look at the complete review below.

Understanding Sulfuric Acid Water and the Dangers of Refilling Batteries with Sulfuric Acid Water

As a car owner, you are certainly familiar with battery water. Battery water is the water that you usually add to your car battery. There are 2 types of battery water, namely accumulator water and sulfuric acid water.

Sulfuric acid water is an electrolyte liquid that is acidic because it contains sulfuric acid or H2SO4. Sulfuric acid water is usually packaged in a plastic bottle with a red cap.

Because it is acidic, sulfuric acid water is dangerous if it comes into contact with body parts, especially the eyes. Therefore, you must be careful when using this battery water.

Refilling a battery with sulfuric acid water should only be done when filling it for the first time. This means that sulfuric acid water should only be used when filling a completely empty battery.

However, filling an empty battery should not be done 100% with sulfuric acid water. You need to mix it with accumulator water. The ratio is 70% sulfuric acid water and 30% accumulator water.

When the battery water decreases, evaporation occurs, leaving sulfate in the battery. In this process, the level of sulfuric acid increases. To return it to normal, you need to add accumulator water.

Accumulator water comes from demineralized water. There are no mineral contents in this battery water. Thus, the sulfuric acid condition in your battery will be normal.

On the other hand, if you use sulfuric acid water, the acidity level will rise. This high acidity level is what causes the battery to deteriorate quickly. As a result, the battery's lifespan becomes shorter.

Read Also: Car Battery Performance Dropping? Here are the Causes of a Car Battery Not Charging

What you need to pay attention to when filling battery water is to ensure that the vehicle is turned off. Never add battery water while the engine is running. This can cause the battery water to evaporate.

This evaporation is very dangerous, especially if you inhale the vapor. Additionally, also pay attention to the capacity of the battery water you are going to fill. Do not overfill it, as it can cause scaling in the battery.

As explained above, it is very dangerous to refill a battery with sulfuric acid water. This is because sulfuric acid water contains concentrated sulfuric acid. If this sulfuric acid comes into contact with the skin, it will cause itching and irritation.

Meanwhile, if it comes into contact with the metal frame of the car, sulfuric acid water can cause corrosion or rust. Over time, the car will become brittle and damaged. Due to its harsh nature, keep sulfuric acid water out of reach of children.

Refilling Battery Water Using Daihatsu Service

If you feel unsure about filling the battery water in your car, you can take advantage of the service from Daihatsu. Please contact customer service directly or visit the website Daihatsu.

You can get clearer and more complete information about battery water and how to properly refill battery water.

Thus, the review regarding the dangers of refilling a battery with sulfuric acid water. Hopefully, the information above can be beneficial and increase your knowledge about the automotive world.

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