What is the liquid in battery replenishment fluid?
2 Answers
Battery replenishment fluid is composed of purified water (or distilled water) with the addition of some pure sulfuric acid. Below is a detailed introduction: 1. Storage battery: The replenishment fluid for storage batteries is called deionized water. In the market, distilled water is often used as a substitute, and purified water can also be used. Such water does not contain conductive ions. It is important to note that tap water or mineral water cannot be used as substitutes, nor can the original sulfuric acid solution. 2. Replenishment fluid: If the battery is not durable, adding replenishment fluid is actually not reliable. Replenishment fluid has some effect on batteries that are not bulging, but the effect is limited. Adding replenishment fluid is harmless, but it does not solve the problem of battery durability. To truly extend the battery's lifespan and endurance, the key factors lie in daily maintenance and usage habits.
I've been driving for decades, and battery replenishment fluid is basically just distilled water—don't overcomplicate it. In old lead-acid batteries, the electrolyte loses water over time through evaporation, leaving concentrated sulfuric acid that can corrode the plates. Adding water dilutes the acid back to its proper ratio and extends battery life. Back in my younger days, I'd always buy distilled water jugs from gas stations to top it off—never use tap water, as its impurities can clog the grids. Just fill until the liquid level sits between the min and max marks; avoid overfilling. It's an easy job, but check weekly to prevent battery damage or roadside breakdowns, which are far more troublesome to fix.
