Rechargeable 3.7V 1200mAh 753048 Polymer Ion Battery 2.0 For SMART Watch batteries Gold Star Jewellers Bonnie Doon Mall Watches Top Brand Smart Watch Battery 3.7v 350mah Rechargeable Li ion Polymer High Power Assorted Batteries 24pcs Cell Watch Batteries Gadget mou. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit COL HEA STN Operating Temperature Range: 40 Degrees Celsius to +85 Degrees Celsius Shelf Life: 5 years Leakage Resistance: Anti Leak Design Movement Compatibility: Analog Quartz 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: COL HEA STN_K0067206