Is battery replenishment fluid distilled water?

[Richardson]

Battery replenishment fluid is distilled water. Below are the classifications of battery replenishment fluid: Battery replenishment fluid is divided into two types: Battery original filling fluid: It is a mixture of sulfuric acid and pure water, with a density of 128g per cubic centimeter; Battery replenishment fluid: It can be pure water, deionized water, or distilled water, and its function is to replenish the water lost during battery use. Battery maintenance precautions: Avoid storing the battery in a discharged state. A discharged state refers to when the battery is not charged in time after use. When the battery is discharged, sulfation is likely to occur, with lead sulfate crystals adhering to the plates, blocking ion channels, causing insufficient charging and reduced battery capacity. When the battery is not in use, it should be charged once a month to extend its service life; Regular inspections are necessary. During use, if the electric bicycle's range suddenly drops by more than ten kilometers in a short time, it is likely that at least one battery in the battery pack has issues such as broken cells, plate softening, or shedding of active material from the plates, leading to a short circuit. In this case, it should be promptly checked, repaired, or regrouped by a professional battery repair institution; Avoid high-current discharge, as it can easily lead to lead sulfate crystallization, thereby damaging the physical properties of the battery plates.

[LaMariana]

I often work on car batteries myself. The battery replenishment fluid is basically distilled water because inside the battery, the electrolyte is a mixture of water and sulfuric acid. Over time, the water evaporates, leaving only the acid with too high a concentration, which can easily damage the battery. So, you need to add pure water to replenish it. Don't use tap water or filtered water—those contain minerals that can corrode the battery plates. I once tried using tap water, and the battery died prematurely. It was a painful lesson. Now, I just buy bottled distilled water from the supermarket—it's cheap and reliable. Before adding the fluid, check that the liquid level is between the marked lines, and wear gloves to prevent acid splashes. Safety first. If you maintain the battery well, starting the car in winter becomes much smoother, saving you hassle and extending its lifespan. Regular checks are key.

[StGianna]

With decades of driving experience, I can confirm that battery replenishment fluid is indeed distilled water, no mistake about it. When the battery fluid level drops after prolonged use, adding this restores balance and maintains electrolyte concentration. Never use river or well water—I once witnessed a friend do so, causing the battery to short-circuit and nearly explode, which was terrifying. When adding, carefully open the battery cap and pour slowly, ensuring not to exceed the max line to avoid acid spillage. Distilled water is readily available at auto parts stores—simple and safe. Proper battery maintenance keeps your car reliable, prevents roadside breakdowns, and saves money on replacements. Developing a monthly inspection habit is best.

[Kent]

I understand that battery replenishment fluid is essentially distilled water, for a simple reason—water evaporates during battery operation, and pure water is needed to maintain the electrolyte composition. Tap water contains impurities that disrupt the chemical balance, leading to premature damage, so I only use distilled water, which is affordable and available at hardware stores. The process is straightforward: remove the battery caps, carefully add the fluid up to the midline, and then securely replace the caps. Remember to ensure good ventilation to avoid acid fumes, and after each top-up, you can drive a bit further with peace of mind.