CR2032 batteries form part of a broader category of specialised battery types, which are often referred to collectively as coin cells or button batteries. This is due to their distinctive shape and profile, typically consisting of a slim circular housing with two flat faces anywhere from 5mm-25mm in diameter, and an overall cylinder height of between 1mm-6mm. Thinner models tend to be referred to as coin batteries, while thicker versions might more commonly be described as button cells.
The CR2032 battery type is an especially popular button-type cell, designed for use in a wide range of smaller, portable or handheld electronic devices and hardware.
In size terms, it falls somewhere in the middle of the coin/button battery range: as the number 2032 in the name denotes, it's a 20mm diameter cell, with a height of 3.2mm.
The ‘C' in CR2032 refers to the battery's chemistry type - namely lithium - while the ‘R' denotes the shape of the battery (round).
CR2032 batteries are among the most widely used of all coin/button cells, and are particularly associated with hardware such as computer motherboards, electronic scales, remote controls, key fobs and calculators. Similar-sized coin batteries can also be used to power various sorts of medical devices, including hearing aids and pacemakers.
Among the general characteristics of a lithium button battery such as a CR2032 are: