Amazon.com: Energizer 377 376 Watch Batteries (Pack of 5) : Health Energy Efficient Watch Battery 506 Energizer Watch Batteries (Single Battery or pack of 5) 1.5 V Smart Watch Batteries for SEIKO MT516 MT516F 3027 26Y BATTERIES Watch Batteries Watch Batteries. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 506 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: 506_K0066687