Special 1220 lithium button batteries from Duracell are batteries you can trust. They are reliable and durable, commonly used to power medical devices such as blood glucose meters and heart rate monitors, safety-related devices like bank card readers, and other electronic devices including watches, clock radios, and pedometers. Duralock technology maintains battery power for up to 10 years when stored. Long-lasting power is guaranteed. The right size is easy to find. Duralock. Child's face packaging. 1 piece.