CR2032 batteries are one of the smallest types of coin-cell batteries, with a diameter of 20 mm and a height of 3.2 mm. The thickness of each CR2032 battery. CR 2032 batteries are small in size and lightweight, but their long service life makes them a perfect fit for devices that are often used out in the field. These batteries can be used for high-drain applications such as cameras and flashlights. They also have a long shelf life, which is ideal for devices that may be in storage or unused for extended periods of time.