ELECTRONICS WATCH BATTERIES Watch Battery Size Conversion Chart at Joseph McClean blog Watch Batteries Batteries Direct Genuine 100% Battery For Apple Watch Series 1 2 3 4 5 SE 6 7 8 Bateria SR621SW Watch Batteries 2 x Seizaiken 364 Equivalent Cell Button S260556650884434ebb7a23d6387fa313z.jpg. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 1589 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: 1589_K0066427