45mAh Smartwatch Battery For Fitbit Alta HR,Alta Activity , Part Number Energizer 379 Button Cell Silver Oxide Watch Battery Pack of 5 for 45mAh Smartwatch Battery For Fitbit Alta HR,Alta Activity , Part Number Energizer 394 380 SR936SW High Drain Silver Oxide Watch Battery, 1.55V Amazon.com: Synergy Digital Smartwatch Battery, Compatible with Huawei Amazon.com: Energizer Watch Electronic Batteries, 1.55 Volts, 377, 2. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 432047 45 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: 432047 45_K0054451