This 371 Silver Oxide Button Cell Battery is 1.55 V and has a capacity of 39 mAh.
This battery is a replacement for Eveready 370, 371; Duracell D370, D371; Varta V371; RayoVac 371; Maxell/Toshiba SR920W, SR920SW; IEC SR69
These are replacement watch batteries and replacement small electronics batteries.