CR2025 button batteries are used to power smaller devices such as watches, controllers, calculators and the like. It is a disposable type of button battery, it cannot be recharged. The voltage of the Energizer Ultimate Lithium CR2025 is 3V. The button cell battery with a Li-type cell is marked with a high capacity, it lasts a long time and there is no danger of the cell leaking. The package contains 2 batteries.