Rechargeable lithium battery type 21700, 3.6V 4000mAh

Author: Faunus

Jun. 02, 2026

The rechargeable lithium battery Type 21700 is becoming increasingly popular in various applications due to its high energy density and efficiency. With a nominal voltage of 3.6V and a capacity of 4000mAh, it has garnered attention for its versatility in powering a range of devices, including electric vehicles, laptops, and portable electronics.

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Key Specifications of Rechargeable Lithium Battery Type 21700, 3.6V 4000mAh

The rechargeable lithium battery Type 21700 has specific characteristics that make it suitable for modern technology. Here are some critical specifications:

  • Voltage: 3.6V nominal
  • Capacity: 4000mAh
  • Diameter: 21mm
  • Height: 70mm
  • Chemistry: Lithium-ion

Applications of Rechargeable Lithium Battery Type 21700, 3.6V 4000mAh

This battery type is notably prevalent in electric vehicles (EVs) and energy storage systems. According to a report by BloombergNEF, the number of electric cars on the road is projected to reach 140 million by 2030, significantly driving the demand for reliable batteries such as the rechargeable lithium battery Type 21700, 3.6V 4000mAh.

Performance and Lifespan

One of the most significant advantages of the rechargeable lithium battery Type 21700, 3.6V 4000mAh is its performance metrics. Studies show that it can typically endure around 500 to 1,000 charge cycles before its capacity begins to degrade significantly. This data is consistent with findings from the Department of Energy (DOE), which outlines the longevity and overall reliability of lithium-ion batteries.

Charge Time

Charging times may vary depending on the charger used, but many users report that a typical 21700 battery can be charged to approximately 80% capacity within one hour. This rapid charging ability is instrumental for devices requiring quick turnaround times.

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Safety Considerations

Safety is paramount when dealing with lithium-ion batteries. The rechargeable lithium battery Type 21700, 3.6V 4000mAh includes built-in protection circuits that help prevent overcharging, overheating, and short-circuiting. Various standards, such as UL 2054, ensure that these batteries meet stringent safety requirements.

Market Trends and Statistics

The global rechargeable lithium-ion battery market was valued at approximately $38 billion in 2020 and is forecasted to grow at a compound annual growth rate (CAGR) of about 17.9% from 2021 to 2028, according to a report by Fortune Business Insights. The demand for the rechargeable lithium battery Type 21700, 3.6V 4000mAh specifically is anticipated to rise as manufacturers like Tesla and Panasonic integrate it into their supply chains.

Environmental Impact

While rechargeable lithium batteries have had a significant role in the transition to cleaner energy sources, mining for lithium poses environmental concerns. The industry is actively pursuing recycling options. According to the International Energy Agency (IEA), recycling lithium batteries can reduce the environmental impact by up to 95% compared to traditional mining methods.

Conclusion

In summary, the rechargeable lithium battery Type 21700, 3.6V 4000mAh represents a crucial advancement in energy storage technology, finding applications in electric vehicles, consumer electronics, and renewable energy systems. As the market continues to grow and evolve, understanding the specifications, advantages, and safety measures associated with this battery type is essential for consumers and manufacturers alike.

For further reading, you can refer to sources like the U.S. Department of Energy, BloombergNEF, and Fortune Business Insights that provide comprehensive insights into battery technology and market statistics.

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