Economy shipping are First class mail, no tracking service. If you need tracking service, please select First class package shipping. 377 / SR626SW Battery Warranty Exp: Dec 2026 100% Original Silver Oxide batteries Voltage: 1.55V Capacity: 30mAh Amperage: 30μA Diameter: 6.8mm Thickness: 2.6mm Weight: 0.4g GEPARD FASHION ACCESSORIES