10 x 1.55V Button Coin Cell Watch Battery Batteries AG4 LR66 LR626 377 Amazon.com: SR626SW Watch Batteries 377 376 AG4 LR626 1.55V Button Cell Amazon.com: Energizer Watch Electronic Batteries, 1.55 Volts, 377, 2 Amazon.com: Energizer 377 376 Watch Batteries (Pack of 5) : Health. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 26R37 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: 26R37_K0068755