Watch Battery Size Chart SizeChartly 5pc 10pk S1131 Silver Oxide 1.5V Watch Battery Replaces 389BP GP89A USA What Is A Watch Battery Made Of at Michael Goodwin blog Amazon.com: RYX NX9 Smart Watch Battery, 380mAh 3.7v Compatible for. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit PL12899XS 02 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: PL12899XS 02_K0060889