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The Function of Acid Battery Water and Car Battery, Know the Differences!

09 April 2025
Fungsi Air Aki Zuur dan Accu Untuk Mobil, Ketahui Perbedaannya!

Car battery water is an electrolyte liquid used to fill the battery so that its performance is always maintained. However, when talking about battery water, there are actually two types, namely battery acid water and battery distilled water. 

So what is the difference between the two? For more details, please pay attention to the following review. 

Functions of Battery Distilled Water and Battery Acid Water for Cars 

In general, battery distilled water and battery acid water function to store electrical flow in the car battery, then deliver that electrical flow to the car's electrical components so that those components can function properly. 

Differences Between Battery Distilled Water and Battery Acid Water 

Here are some differences between battery distilled water and battery acid water.

1. Packaging Color 

The first difference between battery distilled water and battery acid water can be seen from the packaging color. Battery acid water is usually packaged in a bottle with a red cap. Meanwhile, battery distilled water is usually packaged in a bottle with a blue cap. 

The use of a red cap on the battery acid water bottle is not without reason. This color is used to provide information that battery acid water is very dangerous and can cause skin irritation.

2. Acid and Electrolyte Content 

The second difference can be seen from the acid content it has. For battery acid water, the sulfuric acid and electrolyte content is stronger and more concentrated. This occurs because battery acid water does not go through the distillation and demineralization processes. The high content of electrolytes and sulfuric acid can cause skin irritation. 

Meanwhile, in battery distilled water, the demineralization and distillation processes are carried out to obtain the required formulation so that battery distilled water is free from mineral content. This is what makes battery distilled water safe.

3. Usage Duration 

The third difference can be seen from the usage duration. Battery acid water has a relatively long usage duration, as this type of battery water can last for 1.5 to 2 years even if the car is used for daily purposes. Meanwhile, the usage duration of battery distilled water is shorter compared to battery acid water, which is around 6 months to 1 year.

4. Usage 

The fourth difference can be seen from its usage. As is known, battery acid water is usually used for the first filling of the battery or when the car battery is empty. Meanwhile, battery distilled water is usually used when the volume of battery water has started to decrease and needs to be refilled. 

It is important to remember that you are not advised to add the reduced battery water volume with battery acid water as it can trigger an increase in H2SO4 (sulfuric acid) levels, which can damage car components. 

Read Also: Is Refilling Car Battery Water with Battery Acid Water Dangerous?

Safe Composition for Filling Car Battery Water

To ensure safe filling of car battery water, you need to know the right composition. It is advisable that when your car battery is dry or empty, fill it with battery acid water approximately 70% to the lower level of the battery. The remaining 30% should be filled with battery distilled water.

Thus, the review regarding the function of battery water in cars, along with the differences between battery acid water and battery distilled water that you need to know. Given its important function, you need to check the condition of your battery water regularly and periodically. Make sure the battery water is not below the specified volume capacity. 

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