S0061b9161a2c4513986a869e6cffea13N.jpg This environmentally friendly solar watch donates a tree! 6 Outstanding Sustainable Watch Brands Strapcode Watch Bands New Aoke 51.2V Lithium Ion Monitor Solar System Power Supply Secondary. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit OA LK 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: OA LK_K0052545