It is highly recommended to use distilled water in batteries, especially in deep cycle batteries. Distilled water is free from impurities such as minerals, chemicals, and contaminants that are commonly found in tap water or other sources of water. These impurities can have a negative impact on the performance and lifespan of the battery.
When batteries are charged and discharged, a process called electrolysis occurs. This process involves the movement of ions between the battery plates, and any impurities in the water can interfere with this process. Minerals and chemicals in water can create deposits and build-up on the battery plates, reducing their efficiency and capacity over time. This build-up can also lead to short circuits and other issues that can significantly decrease the life of the battery.
By using distilled water, you ensure that there are no additional minerals or chemicals introduced into the battery. Distilled water has gone through a process of boiling and condensation to remove impurities, leaving behind pure water molecules. This ensures that the electrolysis process in the battery can occur without any interference.
It is important to note that you should only replenish the water in your deep cycle batteries with distilled water. Adding any other substances, such as tap water or electrolyte additives, can have detrimental effects on the battery. These substances can alter the chemical composition of the electrolyte, leading to imbalances and potentially damaging the battery.
In my personal experience, I have seen the difference that using distilled water makes in maintaining the performance and longevity of batteries. I have used both tap water and distilled water in batteries, and the ones filled with tap water tended to have shorter lifespans and required more frequent maintenance. On the other hand, batteries filled with distilled water showed better performance and lasted longer before needing replacement.
To sum up, using distilled water in batteries, especially deep cycle batteries, is crucial for their optimal performance and longevity. It helps prevent the build-up of deposits, maintain the efficiency of the battery plates, and minimize the risk of short circuits. Remember to only use distilled water for replenishing the water in your batteries, and avoid adding any other substances or chemicals that can potentially harm the battery.