What is the specific gravity of the battery liquid when the temperature of a fully charged battery is 20℃ in a temperate zone?

The specific gravity of the battery liquid (often sulfuric acid in lead-acid batteries) is an important parameter as it indicates the state of charge of the battery. At a temperature of 20℃, a fully charged lead-acid battery typically has a specific gravity reading around 1.260. This value is used as a reference point for maintenance and monitoring the health and charge status of the battery.

When the battery is fully charged, the higher specific gravity reflects a greater concentration of sulfuric acid in the electrolyte solution, which is crucial for the efficient operation of the battery. If the specific gravity is lower than this value, it often indicates that the battery is partially discharged or experiencing sulfation or other issues that could affect its performance.

Understanding this specific gravity helps in assessing whether a battery will perform adequately for its intended applications, especially in a work environment where reliable power sources are essential.