Can Car Battery Repair Fluid Fix a Battery?

[LeBethany]

Whether car battery repair fluid can fix a battery is as follows: 1. The electrolyte must be prepared with chemically pure sulfuric acid (or specialized electrolyte) and distilled water. The density of the electrolyte is generally 1.25-1.29g/cm³ (at 15°C). Industrial sulfuric acid and ordinary water, due to containing impurities such as iron and copper, can cause self-discharge and damage to the plates, and should not be used in batteries. 2. When the battery is almost dead and the electrolyte specific gravity is not lower than 1.19, first add distilled water to near the minimum scale line, then add pure sulfuric acid (or specialized electrolyte) to adjust the specific gravity to around 1.2. The amount of liquid added should not exceed the upper scale limit. 3. After injecting the electrolyte into the battery, let the battery stand for 3-6 hours. Charging can only begin when the electrolyte temperature is below 35°C. The charging time is approximately 3-4 hours. During charging, when the single-cell voltage of the battery rises to 2.4V and the electrolyte starts to produce a significant amount of bubbles, the charging current should be halved. After charging, a discharge test should be conducted to avoid sulfation damage, as the battery may only appear charged on the surface but be unusable in reality. Therefore, before charging, check the battery for sulfide sedimentation; if present, it should be replaced. 4. When fully charged, adjust the electrolyte specific gravity as follows: at room temperature of 30-40°C, the relative density should be 1.270; at 20-30°C, it should be 1.280; and below 20°C, it should be 1.290.