What is the specific gravity of a fully charged lead-acid battery?

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Multiple Choice

What is the specific gravity of a fully charged lead-acid battery?

Explanation:
Specific gravity tells you how concentrated the electrolyte is, which increases as the battery charges because more sulfuric acid is present in the solution. When a lead-acid battery is fully charged, the electrolyte reaches its highest density, typically about 1.275 to 1.300 at 25°C. Readings lower than this suggest the battery isn’t fully charged or may be aging or sulfated, while readings higher than this can indicate overcharging or an abnormal condition. Temperature affects the measurement, so readings should be corrected to 25°C (warmer electrolyte reads lower, cooler reads higher). Take per-cell readings and compare to this full-charge range to determine charge status.

Specific gravity tells you how concentrated the electrolyte is, which increases as the battery charges because more sulfuric acid is present in the solution. When a lead-acid battery is fully charged, the electrolyte reaches its highest density, typically about 1.275 to 1.300 at 25°C. Readings lower than this suggest the battery isn’t fully charged or may be aging or sulfated, while readings higher than this can indicate overcharging or an abnormal condition. Temperature affects the measurement, so readings should be corrected to 25°C (warmer electrolyte reads lower, cooler reads higher). Take per-cell readings and compare to this full-charge range to determine charge status.

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