What is a 21700 battery? What are its advantages?

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8/6/20232 min read

21700 battery cell supplier
21700 battery cell supplier

The 21700 battery is a type of lithium-ion battery with dimensions of 21mm in diameter and 70mm in length. It is a relatively new battery specification and has several advantages over the traditional 18650 battery:

High energy density: The larger size of the 21700 battery allows for more active material, resulting in a higher energy density. This means that the 21700 battery can provide longer usage time or higher power output in the same volume.

High power output: The 21700 battery has lower internal resistance and higher discharge capacity, enabling it to deliver higher power output. This makes it suitable for devices that require high power output, such as power tools, electric vehicles, and drones.

Long cycle life: The 21700 battery is designed with optimized materials and structure, resulting in better cycle life and longer overall lifespan. This means that the 21700 battery can withstand more charge-discharge cycles and has a longer service life.

Fast charging capability: The design of the 21700 battery allows for faster charging. Compared to the 18650 battery, the 21700 battery can absorb charging current more quickly, resulting in shorter charging times.

Lower temperature rise: The 21700 battery has lower internal resistance and better heat dissipation capability, reducing the temperature rise during high discharge or charging processes. This contributes to improved safety and stability of the battery.

In summary, the 21700 battery offers advantages in energy density, power output, cycle life, charging speed, and temperature management compared to the 18650 battery. Therefore, it is widely used in high-performance electronic devices, power tools, electric vehicles, and energy storage systems.

NEWILLING is a leading wholesale supplier of lithium battery cells in China, with a battery inventory warehouse worth 500 million RMB.

We offer a wide range of options, including LFP, NCM, and LTO cells in both cylindrical and prismatic shapes.

Our brand new grade A lithium cells have capacities ranging from 4000mAh to 340Ah and Charge-discharge rates from 0.2C to 6C. We also provide advanced specialty cells.

Please let us know your design requirements, and we will use our expertise to quickly find the most suitable cell solution and specification for your team.

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