Murata 364 SR621 SR621SW Watch Battery Made in Japan Button Cell High Quality Micro Battery For Watches COL RET BC Amazon.co.uk: watch battery Pocket Watch Battery: Types, Replacement Guide, and Tips Tick Tock Time WATCH BATTERY Watch Batteries Great British Watch Company. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit COL RET BC Operating Temperature Range: 40 Degrees Celsius to +85 Degrees Celsius Shelf Life: 5 years Leakage Resistance: Anti Leak Design Movement Compatibility: Quartz 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: COL RET BC_K0067196