This is the Renata CR2450N-CU 540mAh 3V Lithium Primary (LiMNO2) Coin Cell Battery Features: 3 volts of power will power up devices far longer than other batteries Lithium chemistry provides high capacity to power smaller devices for security or medical purposes 10 Year Shelf Life assures that back-ups are fresh and ready to go at any time Operable in various climates so weather will never harm the power source of your favorite electronics Renata CR2450N-CU 540mAh 3V Lithium Primary (LiMNO2) Coin Cell Battery.