A CR2032 battery is a button cell lithium battery rated at 3.0 volts. It is commonly used as a CMOS battery in computers, calculators, remote controls, scientific instruments, kitchen, office and personal scales, wireless doorbells, garage door remotes, watches and other small devices. Nominal diameter is 20 mm, nominal height is 3.2 mm. CR2032 indicates a round cell 19.7–20 mm diameter and 2.9-3.2 mm height as defined by the IEC standard 60086.
3V CR2032 coin cell