How To Change A Battery In A Mk Watch at Ruth Gray blog [A1578] OEM Replacement Battery For Watch Series 1 S1 38MM Polar Tech How To Change A Battery In A Mk Watch at Ruth Gray blog MT920 Replacement Watch Battery for B872 B873 B876 B877 A710 A715 A730. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit MK2078 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: MK2078_K0067250