A CR2032 battery is a button cell lithium battery rated at 3.0 volts. It is commonly used in computers as a CMOS battery, calculators, remote controls, scientific instruments, wireless doorbells, watches, and other small devices. Nominal diameter is 20 mm, nominal height is 3.2 mm. Review of 14 data sheets from different suppliers show a range of weights from 2.8 g to 3.9 g. CR2032 indicates a round cell 19.9.±0.1 mm diameter and 3.1±0.1 mm height as defined by the IEC standard 60086. Except for the two extreme outliers, all reported weights were between 3.0 g and 3.2 g, with the mode being 3.2 g.