In recent years, lithium-ion batteries have become an integral part of modern technology. These batteries power everything from cell
phones to electric cars, and their popularity is only increasing. However, with the different types of batteries available, it can be difficult to choose the right one for your needs. In this article, we will compare two of the most popular types of lithium-ion batteries: 21700 vs 18650 batteries.
1. Introduction
As mentioned earlier, lithium-ion batteries are widely used in modern technology. However, the 18650 and 21700 batteries are the two most popular types that are being used. These batteries are often used interchangeably, but they have some differences. In this article, we will discuss those differences and their advantages and disadvantages.
2. What are 21700 vs 18650 battery?
18650 and 21700 batteries are both cylindrical lithium-ion batteries that use a similar technology to store and release energy. The numbers in their names denote their dimensions. An 18650 battery is 18mm in diameter and 65mm in length, while a 21700 battery is 21mm in diameter and 70mm in length.
3. Size and Weight Comparison
One of the primary differences between the two batteries is their size. As mentioned earlier, the 21700 battery is slightly larger than the 18650 battery. This difference in size also translates to a difference in weight. A 21700 battery typically weighs about 70 grams, while an 18650 battery weighs about 50 grams.
4. Capacity and Energy Comparison
The capacity of a battery refers to the amount of energy it can store, while energy refers to the amount of power it can deliver. Generally, 21700 batteries have a higher capacity and energy density than 18650 batteries. The higher capacity means that the battery can store more energy, which translates to longer battery life.
5. Power and Performance Comparison
Both batteries can deliver similar power outputs, but 21700 batteries can handle higher currents due to their larger size and higher energy density. This makes them ideal for high-drain devices such as power tools, electric vehicles, and other applications that require a lot of power.
6. Charging Time Comparison
The charging time for both batteries is similar. However, due to their higher capacity, 21700 batteries may take longer to charge than 18650 batteries.
7. Cost Comparison
The cost of the batteries varies based on several factors, such as the manufacturer, quality, and capacity. Generally, 21700 batteries tend to be more expensive than 18650 batteries due to their larger size and higher capacity. However, the cost may vary based on the specific brand and model.
