How much voltage is in a watch battery?

The voltage of a watch battery depends on its type. The most common type of watch battery is the silver-oxide battery, which typically has a voltage of 1.55 volts. Other types of watch batteries include lithium-ion batteries, which can range from 1.5 to 3.6 volts, and nickel-metal hydride batteries, which typically have a voltage of 1.2 volts. Some digital watches may also use coin cell batteries, which typically have a voltage of 3 volts.