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SIPANI battery packs are equipped with top-brand cell batteries (such as EVE, CATL, Gotion, Lishen, Ganfeng, Longtai, Samsung, LG, Panasonic, SANYO, Sony, WTT, DLG, BAK, Roofer, etc.), with brand new grade A, reaching up to 6000 cycles. Whether cylindrical batteries (18650, 32700, 32650, 26650, etc.), or prismatic batteries, all cells will go through incoming inspection, capacity cycle test and other tests to form a lithium battery packs. We maintain a long-term stable partnership with battery cell suppliers of well-known brands, and choose high-quality cells to ensure the safety, durability, and quality of our lithium battery.