2 x Renata 329 Watch Battery Swiss Made Silver Oxide 1.5 v Also Most Commonly Used Watch Battery at Emil Bentley blog Energizer 394 380 SR936SW High Drain Silver Oxide Watch Battery, 1.55V How to Change a Watch Battery The Ultimate Guide Sofly A1579 Battery for Apple Watch (42 mm, Original & Series 1) Apple Watch Series 1 A1579 42mm Replacement Battery Aussiebatt. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 1529 Operating Temperature Range: 40 Degrees Celsius to +85 Degrees Celsius Shelf Life: 5 years Leakage Resistance: Anti Leak Design Movement Compatibility: Quartz Swiss Movement Water Resistance Compatibility: Suitable for 50m Water Resistant Watches Mercury Free: Environmentally Friendly (0% Hg) High Low Temperature Tolerance: Extended Performance in Extreme Climates SKU: 1529_K0066440