Rechargeable lithium battery type 21700, 3.6V 4000mAh

The proliferation of portable electronics has led consumers to seek efficient power solutions. Understanding the nuances of rechargeable lithium batteries can be overwhelming, especially with options like the 21700 type.

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Summary: The Rechargeable lithium battery type 21700 is a 3.6V, 4000mAh powerhouse known for its high capacity and long life. It's ideal for applications ranging from electric vehicles to high-performance flashlights.

What Is a 21700 Lithium Battery?

The 21700 lithium battery is a cylindrical cell, measuring 21mm in diameter and 70mm in length. It is designed to provide higher energy density and longer run times compared to its smaller counterparts like the 18650 battery.

Key Specifications of the 21700 Battery

Benefits of the 21700 Lithium Battery

• High Energy Density: Up to 50% more capacity than 18650 batteries, allowing for longer usage times.
• Improved Thermal Performance: Offers better heat dissipation, reducing the risk of overheating during charge and discharge.
• Wide Application Range: Suitable for electric vehicles, e-bikes, and portable electronics.

Real-World Applications

Companies like Tesla have adopted the 21700 lithium battery for their electric vehicles, utilizing the battery's superior energy density to extend driving range. Similarly, many high-performance flashlights leverage this battery type for extended illumination times.

Statistics on Lithium Battery Adoption

According to a report by Market Research Future, the lithium battery market is projected to grow by 18.4% annually, indicating a significant increase in demand for high-capacity batteries like the 21700.

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Frequently Asked Questions

1. What devices can use the 21700 lithium battery?

Common devices include electric vehicles, power tools, and high-performance flashlights. Its high capacity makes it ideal for energy-intensive applications.

2. How does the 21700 compare to 18650 batteries?

The 21700 battery offers higher capacity (4000mAh vs. 2500mAh for 18650), allowing for longer run times, making it a better choice for modern applications.

3. Are there safety concerns with using lithium batteries?

While generally safe, lithium batteries can be prone to thermal runaway. Using appropriate charging equipment and ventilation can mitigate risks.

4. Can I replace a 18650 battery with a 21700?

Direct replacement isn’t recommended without confirming device compatibility, as the physical size and electrical specifications differ.

5. Where can I purchase 21700 lithium batteries?

These batteries are available through online retailers, electronics stores, and specialty battery shops, often with a variety of brands and capacities.