391/ SR1120W
Maxell Watch Battery SR1120W is a silver oxide high drain battery 1.55 V. Watch Battery SR1120W measures 11.6 x 2.1mm. Watch battery SR1120W has a capacity of 50 mAh.
Interchange: Energizer 391, Renata 391, Varta V391, Rayovac 391, Timex L, Duracell D381/391, Citizen 280-30, Seiko SB-BS, I.E.C SR1121 (SR55).