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Eve Ifr 40130 C40 LiFePO4 Battery 4000 Cycles 20ah Battery Cylindrical Cell LiFePO4 Cell Lithium Battery for Portable Energy Storage. LiFePO4 Chemistry: Lithium Iron Phosphate cathode material for enhanced safety and stability. Comprehensive Certifications: CE, UL, IEC, RoHS, UN38.3, MSDS, ATEX, and ESG certified. OEM/ODM Services: Full customization, minor customization, and design-based options available. Fast Sample Delivery: Sample orders processed within 7-12 days for quality testing. Global Shipping Options: FedEx, air, and sea shipping available with 3-5 day delivery for samples.