Amazon.com: #321 2 Renata Watch Batteries : Health & Household Recyclable Watches Battery Replacement 321 Unlocking Time: Opening Your Watch for Battery Replacement CitizenSide Renata 321 SR616SW Batteries 1.55V Silver Oxide 321 Watch Battery (2 Energizer 321 Watch Batteries, SR616SW Battery Cell, Silver Oxide, 5 Renata Watch Battery 321 0%Hg Mercury Free X 3 Walmart.com. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 321 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: 321_K0066716