Who Produces 21700 Battery?
Blog | Published by Alex on December 9, 2025
The 21700 battery has become increasingly popular due to its high energy density, long cycle life, and wide range of applications. These batteries are widely used in electronic devices, power tools, electric vehicles, and energy storage systems. Many companies around the world have invested heavily in the research, development, and production of 21700 batteries, including Joinsun, BAK Battery, and Dongchi.
Joinsun (JOINSUNCELL | Zigong, China)
Joinsun is a China manufacturer specializing in cylindrical lithium-ion batteries, producing both 18650 and 21700 battery. The company focuses on providing high-quality batteries for consumer electronics, portable power solutions, and industrial equipment.
Joinsun operates multiple advanced automated production lines and employs a professional R&D team along with skilled technicians. The company reports a daily production capacity of several hundred thousand cylindrical cells, offering customized battery solutions tailored to specific applications, including adjustments in capacity, discharge rate, and size.
The latest Joinsun battery models include 18650 - 4000mAh, 18650 - 4200mAh, and 21700 - 6000mAh. These cells are certified to meet multiple domestic and international standards, including CCC, UL, CE, RoHS, and IEC 62133, ensuring safety and performance. Joinsun batteries are widely used in power banks, electric tools, electric scooters, e-bikes, flashlights, and portable fans. With stable production capacity and a wide product range, Joinsun has become a significant supplier in China’s cylindrical lithium battery market.
BAK (bakpower | Shenzhen, China)
BAK Battery, also known as BAK Power, is a well-known Chinese battery manufacturer offering a broad range of products, including consumer electronics batteries, power batteries, and energy storage systems. Headquartered in Shenzhen, BAK operates multiple production facilities in China, including locations in Zhengzhou and Anhui, providing a complete battery production chain from single cells to battery modules and packs.
The 21700 series from BAK includes models such as N21700CD-53E and N21700CG-50E, known for high capacity, high discharge rate, and long cycle life. These cells are used in electric bicycles, electric vehicles, energy storage systems, power tools, and industrial equipment. BAK batteries meet international certifications, including UL, IEC 62133, and UN38.3, ensuring safety and reliability. As one of the early companies in China to invest in cylindrical lithium batteries, BAK holds a strong reputation in both domestic and international markets.
Dongchi (dcebattery | Jilin, China)
Dongchi is a company engaged in the research and production of lithium-ion batteries, including 18650 and 21700 battery. Its products are aimed at consumer electronics, power tools, and energy storage applications.
Dongchi operates automated production lines and quality control systems to ensure consistent and reliable battery performance. The company’s 21700 cells have passed multiple safety and performance certifications, making them suitable for use in power banks, electric bicycles, power tools, and other applications.
Summary
With the growth of electronics and the renewable energy industry, the demand for 21700 batteries continues to rise. Companies like Joinsun, BAK, and Dongchi provide a wide range of battery solutions, supporting applications from consumer electronics to industrial equipment and energy storage systems. These manufacturers play a key role in advancing the use and development of 21700 batteries, ensuring a reliable supply for global markets.
