The Panasonic lithium coin CR2032 battery has a high voltage of 3V. In short: lots of power in an ultra-compact design. You have enough with one lithium battery in comparison to 2, 3 or more traditional batteries. Lithium Coin CR2032 has certain achievements for devices where traditional batteries cannot be used. This battery can be used for memory back-up, digital watches, car keys, laser pens, fitness appliances and medical devices such as tensiometers and clinical thermometers.