Watch Batteries Smart Watch Bluetooth Rechargeable Lithium Ion Polymer 3.7V 100mAh Lipo Watch Batteries: A Beginner's Guide To Understanding Types And Sizes Amazon.com: Vvuilsty A2277 Replacement Battery for Watch Series 5 Gen. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 20 4507DBTI 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: 20 4507DBTI_K0068360