Supplier Custom 21700 Battery Cell
Supplier Custom 21700 Battery Cell

What Is 21700 battery cell?

21700 cell is a kind of rechargeable lithium battery with a diameter of 21 mm and a length of 70 mm, which is widely used in the fields of electronic cigarettes, electric tools, flashlights electric bicycles, etc. 21700 cells support series-parallel connection to form a battery pack. 21700 batteries are favored by various industries because of their high energy density, low self-discharge, and long service life, and they are more powerful than the 18650 batteries. The 21700 battery is favored by various industries for its high energy density, low self-discharge, and long service life, and has a higher capacity than the 18650 battery.

NMC 21700 Lithium Battery

21700 Cell Manufacturer: Powering the Future with Innovation

21700 Cells are revolutionizing industries and empowering devices worldwide. As a leading manufacturer, we provide high-performance solutions with unmatched quality, cutting-edge technology, customized designs, global reach, and a commitment to sustainability. We are dedicated to propelling innovation and empowering our customers to create groundbreaking products and services, shaping a future powered by sustainable energy.

21700 Battery Cell Advantages

keheng puts your experience way ahead of the rest!

As a lithium battery manufacturer, we produce 21700 batteries compatible with all devices on the market. Since its establishment in 2008, keheng has been engaged in the production and sales of lithium batteries. Our 21700 batteries require a BMS system to control overcharge, over-discharge, explosion, and short circuits when multiple batteries are connected in series and parallel. Meanwhile, you can choose different group size customization including 14500, 18650, 21700, 26650, etc.
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keheng puts your experience way ahead of the rest!
Why Choose Us 21700 Battery
Why Choose Us 21700 Battery?

Best Price: Our factory manufacturing 21700 battery packs guarantees you wholesale or customized cells at the best price on the market.
Product Quality Assurance: A QC team of 30 people guarantees that the products will leave the factory without any manufacturing defects and can be used normally.
Timely Delivery: for the 21700 batteries we supply, delivery can be arranged within 10-20 working days.

Customized 21700 batteries cell change life
  • 1. Battery size: customize the size of the battery according to customer needs.
  • 2. Battery capacity: customize the capacity of the battery according to the customer’s demand.
  • 3. Battery voltage: customize the voltage of the battery according to the customer’s demand.
  • 4. Battery shape: customize the shape of the battery according to the customer’s requirement.
  • 5. Battery interface: customize the interface of the battery according to the customer’s demand.
Customized 21700 batteries cell change life
What is a 21700 battery cell?

The meaning of 21700 battery, in fact, usually refers to a cylindrical battery with an outer diameter of 21mm and a height of 70.0mm. Currently, there are two types of 21700 batteries commonly sold in popular a little bit, respectively, 4200mAh (21700 lithium batteries) and 3750mAh (21700 lithium batteries).

What is the difference between 20700 and 21700?

20700: diameter is 20mm, length is 70mm.
21700: diameter is 21mm, length is 70mm.

Capacity Difference
Due to the increased size, 21700 batteries typically have a higher capacity than 20700 batteries. 20700 batteries may have a typical capacity range of 3,000mAh to 4,000mAh, while 21700 batteries typically have a capacity of 4,000mAh to 5,000mAh or higher.

Application Differences:
While the two can be used interchangeably in some applications, 21700 batteries are increasingly favored for electric vehicles, large-scale energy storage systems, and high-performance portable electronic devices due to their higher energy density. In contrast, 20700 batteries may be more common in slightly smaller electronics or applications with more compact design spaces.

What are the benefits of 21700 batteries?
  • Higher Energy Density: 21700 cells can contain more active material in a single cell, so they offer higher energy density relative to other common sizes such as 18650.
  • Higher capacity: 21700 cells typically have higher capacity compared to other smaller cells (e.g., 18650), which makes them particularly well suited for applications that require long periods of operation, such as electric vehicles and large portable devices.
  • Improved power output: The larger size allows the battery to be designed with a more optimized internal structure that improves current transfer efficiency, resulting in enhanced power output.
  • Longer Cycle Life: Due to optimized chemical composition and structure, they can provide a long life while maintaining high energy density.
  • Cost-effectiveness: With improvements in manufacturing technology and increased production scale, 21700 cell costs are declining, making them more attractive in terms of cost-effectiveness.
  • Flexibility and applicability: This battery is suitable for a wide range of applications, from small consumer electronics to large energy storage systems, due to its medium size.
What is the maximum capacity of 21700 battery?

Currently, the common capacity of 21700 is 3750-4200mah cells, but 21700 cells can be designed for 5000mah capacity.

How to maintain Li-ion ternary batteries in daily life to have a longer service life?

Every time you put the battery 100% DOD, the cycle life is 1500 times; 50% discharge depth, the life is 1800 times, 30% discharge depth, and the cycle life is 2500 times.

How to maintain Li-ion ternary batteries in daily life to have a longer service life

Where can I find the best 21700 battery?

Keheng, as a Li-ion battery supplier, not only provides NMC cells including but not limited to 14500, 21700, 18650, 26650, and 32650 for all kinds of scenarios and applications.

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