Typically used in calculators, glucometers, and other small devices, the Panasonic CR1216 Lithium Coin Cell is the perfect replacement power source. This miniature battery utilizes a powerful Lithium Manganese Dioxide chemistry, which allows the cell to deliver 3 Volts of power and hold a respectable charge of 25 mAh. The CR1216 self-discharges at an extremely low rate, giving it a sizable shelf life which allows it to be kept around the office or house until a battery needs replacing.