Watch Battery Renata 391 is a silver oxide high drain battery 1.55 V. Watch Battery 391 measures 11.6X2.1mm. Renata 391 has a capacity of 50 mAh. Renata Switzerland is a leading manufacturer of premium button cells for watches and many electronic products.
Interchange: Energizer 391, Maxell SR1120W, Varta V391, Rayovac 391, Timex L, Duracell D381/391, Citizen 280-30, Seiko SB-BS, I.E.C SR1121 (SR55).