CR2032 battery

A battery rated at 3.0 volts is commonly used in watches, wireless doorbells, and other small devices. Sometimes referred to as a “button cell” or “lithium coin,” the battery is shaped like a coin with dimensions of 20mm diameter x 3.2mm height (from which the “2032” is derived).

Sometimes referred to as a “button cell” or “lithium coin,” the battery is shaped like a coin with dimensions of 20mm diameter x 3.2mm height (from which the “2032” is derived). The CR2032 is twice as thick as the CR2016.