How do they even get the voltage that high? The same way as any other battery, just increase the number of cells. Most cells seem to run between 1.5-2 volts. A

How do they even get the voltage that high? The same way as any other battery, just increase the number of cells. Most cells seem to run between 1.5-2 volts. A 12 volt car battery is usually six cells of 2 volts each.