The Hot Sale Bulk Lithium Battery Cell 21700 (3500mAh) is a high-performance cylindrical NCM (Nickel Cobalt Manganese) cell designed for reliable energy storage and power delivery. With stable 3.7V nominal voltage, this battery ensures high efficiency and long cycle life, making it suitable for electric vehicles, e-bikes, power tools, solar storage, UPS, and other high-drain devices. Its compact cylindrical 21700 form factor provides excellent energy density and durability for demanding applications.