Lithium Ion Battery, Smartwatch Lithium Ion Battery Safe Operation EB Amazon.com: Tingen 270mAh Battery Replacement for Watch 5 40mm SM R905 Amazon.com: Renata Silver Oxide Watch Battery 371 SR920SW (10 1.55 Volt Watch Battery 370 Replaces SR920W: Amazon.co.uk: Fashion Burberry BU9020 Men's Heritage Brown Watch Watches & Crystals Burberry BU9020 The City Beige Dial Leather Strap Women's Watch. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit BU9020 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: BU9020_K0063130