Genuine Sony 399 395 1.55V Silver Oxide Watch Battery x2 eBay Amazon.com: 4 each: Duracell Silver Oxide Watch Calculator Battery 379 Watch battery Strip of 5 Batteries : Amazon.ca: Health & Personal LiCB SR927SW 395 Watch Batteries 1.55V Silver Oxide 399 Battery (40 381015 Small Rechargeable Lithium Polymer Watch Battery 380mAh Smart Watch Battery LQ S1 YX W9B 3.7V 380mAh Rechargeable Li ion. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 3899 B 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: 3899 B_K0064032