Choosing The Right Watch Batteries Made Easy: A Beginner's Guide Amazon.com: #390 Renata Watch Batteries 6Pcs : Health & Household Watch Tech Sales & Repairs Watch Repairs and Sales Brisbane & Sydney Closeup of Watch Batteries of Various Sizes Stock Photo Image of Watch Battery Cross Reference Chart Conversion Guide Amazon.co.uk: casio watch battery replacement. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 1900940 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: 1900940_K0049946