Duracell Watch Electronic Battery 377 1.5 volts 1 pk Shell Lumber and Amazon.com: Synergy Digital Smartwatch Battery, Compatible with Amazfit Duracell Watch Battery 377, 6 pack Walmart.com Watch Batteries. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit DZ1577 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: DZ1577_K0052773