18650 vs 21700 battery cell
The difference between 18650 and 21700 batteries is mainly reflected in the difference between size and capacity. 18650 batteries are the best choice for electric vehicles, power tools, bicycles, and mobile devices due to their high technical maturity, high degree of automation, guaranteed battery pack quality, and low cost. However, 21700 batteries have great advantages in battery energy density and cost reduction. Compared with 18650 batteries, the specific energy of 20700 and 21700 batteries has not increased significantly, which is due to the size difference. Greater differences are observed between batteries of the same format optimized for high energy or high power.
NMC 21700 Lithium Battery
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Start wholesale 21700 batteries of different capacities for your e-cigarettes, Keheng provides 21700 1000mah, 1800mah, 2000mah, 2500mah and other different capacities to meet your specific requirements.
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Keheng customized battery packs composed of different cells, 21700 rechargeable lithium battery pack for comm base station accessories to give you a wide range of choices!
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The 21700 batteries, which are specially provided for e-bikes, can maintain their efficiency for a long time and enhance the experience of using them.
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As a leading manufacturer of 21700 5000mah/ 6000mah lithium batteries, we offer high-performance solutions that meet the needs of modern society.
21700 Cell Manufacturer: Best-in-class battery performance, safety and cost
Keheng uses our proprietary ALD technology to provide Li-ion batteries with enhanced performance, improved safety and lowest cost.
21700 Battery Cell Advantages
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graphite with fast charging characteristics can be selected to improve fast charging performance.
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The capacity of a single cell is increased, and the proportion of auxiliary components is reduced.
Keheng helps customers address targeted areas of application solutions, including home and commercial energy storage systems, forklifts, electric bicycles, golf carts, electric scooters, RVs, and more.
With over 500 satisfied customers from various industries, we pride ourselves on providing high-quality products and excellent customer service.
Our standard products are CE, FCC, UN38.3, and MSDS certified, and we can assist our customers in obtaining certification for their customized 21700 batteries.
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.
- 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.
21700 Batteries Are Widely Used
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).
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.
- 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.
Currently, the common capacity of 21700 is 3750-4200mah cells, but 21700 cells can be designed for 5000mah capacity.
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.
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.