What is the approximate open-circuit voltage per cell in a lead-acid battery?

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Multiple Choice

What is the approximate open-circuit voltage per cell in a lead-acid battery?

Explanation:
Open-circuit voltage per cell is the voltage you measure across a single lead-acid cell when no current is flowing. For this chemistry, the resting potential sits about 2.1 volts per cell. That’s why a six-cell 12-volt battery reads roughly 12.6 volts when fully rested and charged. Values like 2.7 V are too high for a single cell, and 1.8–2.0 V are lower than the typical resting level. So the correct, widely accepted resting per-cell voltage is about 2.1 V.

Open-circuit voltage per cell is the voltage you measure across a single lead-acid cell when no current is flowing. For this chemistry, the resting potential sits about 2.1 volts per cell. That’s why a six-cell 12-volt battery reads roughly 12.6 volts when fully rested and charged. Values like 2.7 V are too high for a single cell, and 1.8–2.0 V are lower than the typical resting level. So the correct, widely accepted resting per-cell voltage is about 2.1 V.

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