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Question:

Most 12 V car batteries are made up of six individual cells connected in series. What is the voltage of each cell in a car battery?

A 2 V
Explaination

Voltages in series are added to determine the total voltage, so divide 12 volts by 6 cells to get 2 volts.
To be exact, each cell in a car battery provides 2.1 volts for a total of 12.6 volts when connected in a series and at full charge.