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Long Lasting 3V Lithium Manganese Dioxide Button Cell with Reliable Power. Long Shelf Life: 10 years storage time ensures reliable power for key fobs. High Pulse Current: Supports 30mA maximum pulse current for stable performance. Industrial Grade Quality: First in China market with CNAS certified testing center. Customization Available: ODM service and customization from samples are supported. High Capacity: 620mAh nominal capacity provides long-lasting energy. 100% Inspection: Every unit undergoes visual and function inspection. Eco-Friendly Design: Recyclable chemical cell suitable for sustainable use.