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Ultra Battery for Mi Models Bn46 Bm4r Bn36 Bm3a Bm36 Bm4j Bn34 Bm37 Bm3b Bm53. High Capacity Battery: 5000mAh capacity for extended usage. Diverse Battery Types: Offers polymer, aluminum, 18650, and toy batteries. Long Cycle Life: More than 500 charge cycles for durability. CE Certification: Products meet CE safety and quality standards. OEM and ODM Services: Full customization available from samples or designs. One Year Warranty: Comprehensive one-year guarantee on all products. Global Export Network: Serving markets in Africa, Middle East, Asia, Americas, and Europe. 15 Years Experience: Over 15 years of manufacturing expertise and 8 years of trading.