AG4 Watch Battery Equivalent 377 376 SR626SW SR66 SR626 Battery Stable Watch Battery 6444 How to Test a Watch Battery AllInWatches Smart Watch Battery Comparison and How to Choose Galaxy watch 5 44 mm battery life : r GalaxyWatch. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 6444 Operating Temperature Range: 40 Degrees Celsius to +85 Degrees Celsius Shelf Life: 5 years Leakage Resistance: Anti Leak Design Movement Compatibility: Quartz Swiss or Chinese or Japanese 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: 6444_K0064029