Energizer 392 Silver Oxide Button Cell Battery

Energizer, 1.5V. Delivers long-lasting power to your button-battery-operated devices, from household electronics like keyless entry systems, to e-books, toys, calculators, and watches, to heart rate and glucose monitors. And these zero-mercury coin batteries can hold power for up to 5 years in storage. Long-lasting power you can count on when you need it.