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Premium Quality 3V Lithium Manganese Dioxide Button Cell with 10 Years Shelf Life. 10-Year Shelf Life: Ensures long-term reliability with a storage time of 10 years. Industrial Grade Quality: Rated as Industrial Grade with 620mAh capacity and 3.0V nominal voltage. High Pulse Current: Supports maximum pulse discharge current of 30mA for high-demand applications. Certified Testing Center: Equipped with a CNAS certified testing center for quality assurance. 100% Product Inspection: All finished products undergo visual and functional inspection before shipping. ODM Customization Available: Offers customization services based on customer samples. Established Manufacturer: Company founded in 1954, recognized as a top brand in China.