Watch Batteries Replacement Apple Watch Series 1 38mm Battery A1578 (205mAh) New Arrival Michael Kors watch MK 8157 in for a new glass, battery and clean from Apple Watch Series 1 A1578 38mm Replacement Battery Aussiebatt. 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