The Energizer SR63 (379) is a Silver Oxide Button Cell Battery with Zero Mercury. It has an average output capacity of 14mAh. A variety of watches, toys, glucose monitors and calculators use this battery. This silver-oxide battery can be used as a replacement for the following batteries: 280-59, D379, SB-AC, SB-DC, SR521SW, SR63. * Zero Mercury * Ideal for watches and calculators * Long and stable discharge * Nominal voltage 1.55V * Capacity: 14mAh * Dimensions: 5.8(W) x 1.95(D)mm * Weight: 0.21g * Supplied singly * Manufacturer's part: Energizer 638006