OnePlus is working on a mystery smartwatch that probably isn't the Watch 3 How To Find Watch Battery Size CitizenSide Apple WATCH Series 7 CELLULAR 41MM battery,high grade replacement Apple Dependable SNAE77 Watch Battery. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit SNAE77 Operating Temperature Range: 40 Degrees Celsius to +85 Degrees Celsius Shelf Life: 5 years Leakage Resistance: Anti Leak Design Movement Compatibility: Quartz 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: SNAE77_K0052541