Amazon.com: Energizer Watch Electronic Batteries, 1.55 Volts, 377, 2 Amazon.com: YKM 40 Pack 377 SR626SW Watch Batteries LR626 376 V377 377a Up to 100pcs AG4 377 377A LR626 SR66 1.5 Volt Alkaline Button Cell 3 ~ Duracell Silver Oxide 377 376 1.5 V 28 Ah Electronic Watch Battery 10 x 1.55V Button Coin Cell Watch Battery Batteries AG4 LR66 LR626 377. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 15677_6 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: 15677_6_K0051423