Maxell Watch Battery SR920W is a silver oxide high drain battery 1.55 V. It measures 9.5 x 2.0 mm. It is mercury free and has a capacity of 40 mAh.
Interchange: Energizer 370, Renata 370, Varta V370, Rayovac 370, Duracell D 370/371, Timex Z, Citizen 280-51, Seiko SB-BN, I.E.C SR921 (SR69)