Swiss Arms 8.4v 1600mah NiMH Battery with Small Tamiya Connector Fine Watch Battery Series 1 2 3 4 5 6 42mm S1 S2 S3 S4 A1761 Series1 38mm Suitable for swatch watch Swiss original battery BATTERY 5 8x1 6 1 55V Watch 1 38 Series Original Battery at 230 Smart Watch Battery in. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 15804_1 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: 15804_1_K0051375