The 21700 40T Lithium-Ion Battery Cell is a high-performance rechargeable cell with 3.7V nominal voltage and 4000mAh capacity. Designed for E-bikes, E-motorbikes, and high-drain applications, it offers reliable power with excellent energy density and stable cycle life. Its ability to support 3C, 5C, and 10C discharge rates makes it suitable for demanding devices such as power tools, UPS, solar systems, and energy storage applications. Built with high safety standards, this cell ensures long-lasting durability and consistent output.