21700 batteries offer higher energy density, around 300wh/kg, compared to 250wh/kg for 18650 batteries, making them more efficient. However, 18650 batteries are more cost-effective and widely compatible. Consider your budget and performance needs when choosing between them for electric bikes and scooters.
What is a LEV battery?
A dedicated onboard charger or an off-board charger can charge LEV batteries directly from the grid or from the grid using a dedicated onboard charger. A LEV battery is a high performance battery that is designed for use in electric vehicles. LEV batteries are made with high quality materials and construction methods that make them durable and capable of providing a long service life.
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21700 vs 18650 battery
There are many differences between 21700 and 18650 batteries. Some of these differences include:
Power output
A lithium-ion battery should be selected based on the amount of power it will output. It would be best to choose 21700 cells over 18650 cells if you know the application will require a lot of energy and don’t want something too bulky or heavy.
Battery cell weight
The weight of 21700 batteries can range from 60g to 48g, depending on their specifications.
Price
21700 batteries tend to be more expensive than 18650 batteries because they are newer and have more features.
Energy Density
The 21700 battery has a higher energy density than the 18650 battery.
Capacity
Among the most popular types of rechargeable lithium-ion batteries, the 18650 has a capacity of 2600-3500mAH, while the 21700 can reach 5000mAH, meaning the 21700 cylindrical lithium-ion cells have more energy density, extending their runtime.
Damage
Furthermore, 18650 batteries are more susceptible to damage from external factors such as heat and pressure.
Dimension
There are significant differences in dimensions between 18650 and 21700 batteries. The 18650 battery measures 65mm long and 18mm in diameter, while the 21700 battery measures 70mm long and 21mm wide. This is due to their different capacities—the larger capacity of the 21700 lithium-ion allows it to be larger in size and have high power.
What are the benefits of a 21700 battery?
21700 batteries offer a number of advantages over other battery types, including:
1. Increased capacity: 21700 batteries have a higher capacity than other battery types, making them ideal for applications that require a lot of power.
2. Improved performance: 21700 batteries deliver improved performance thanks to their higher capacity and improved cell technology.
3. Lower cost: 21700 batteries are typically less expensive than other battery types, making them a more affordable option for electric vehicle (EV) applications.
4. Safer: 21700 batteries are considered to be safer than other battery types thanks to their chemistry and design.
Application of 21700 lithium-ion batteries
21700 batteries are widely used in various applications due to their high voltage, discharge rate, and energy density. Let’s explore some of the key uses of these versatile batteries.
- LEVs (Light Electric Vehicles):
- 21700 batteries are commonly used in LEVs like electric bicycles and scooters due to their high voltage and discharge rate, providing efficient power delivery for propulsion.
- Solar Energy Storage:
- Solar energy generated by panels needs to be stored efficiently for later use. 21700 batteries are favored for their ability to quickly charge and discharge, making them suitable for solar energy storage systems.
- Power Tools:
- 21700 batteries are preferred in power tools for their high power output, enabling longer runtimes and faster recharging, enhancing productivity for various tasks.
- Laptops:
- Rechargeable lithium-ion cells of the 21700 type are utilized in laptops due to their higher energy density compared to the older 18650 cells, resulting in compact yet long-lasting battery packs.
- Electric Vehicles (EVs):
- High-density lithium-ion cells of the 21700 variant are ideal for electric vehicles, providing the necessary energy storage capacity and power output for extended driving ranges and efficient performance.
- Medical Devices:
- With a low self-discharge rate, 21700 batteries ensure that medical devices remain operational and ready for use whenever needed, offering reliability and convenience in critical situations.
- Vapes:
- 21700 batteries are chosen for vaping devices due to their high discharge rate, delivering the power required for producing vapor efficiently and consistently.
In conclusion, the versatile characteristics of 21700 batteries make them indispensable in a wide range of applications, from consumer electronics to renewable energy systems and transportation. Their high performance and reliability contribute to enhanced efficiency and convenience in various industries.
What are the benefits of an 18650 battery?
These advantages make 18650 battery packs highly desirable for electric bicycles and other light electric vehicles (LEVs):
- Increased Capacity: With a capacity of 3,000 to 4,000 mAh, an 18650 battery pack lasts twice as long as AA or AAA battery packs, providing extended power for LEVs.
- Increased Voltage: Operating at 3.6 to 4.2 volts, 18650 battery packs offer double the voltage of AA or AAA packs, enhancing the power and efficiency of LEVs.
- More Discharge Cycles: 18650 battery packs endure up to 500 discharge and recharge cycles, compared to only about 200 cycles for AA or AAA packs, resulting in a longer lifespan.
- Lower Weight: Weighing approximately half as much as AA or AAA packs, 18650 battery packs are lighter, making them easier to transport and install in LEVs.
Application of 18650 lithium-ion batteries
18650 batteries find applications in various fields due to their versatility and performance:
- LEVs: Essential for electric bikes, motorcycles, and scooters, where factors like cost, space, and weight are crucial.
- Portable Devices: Widely used in satellite phones, remote-control toys, and controllers due to their compact size and high energy density.
- Flashlights: Commonly utilized in flashlights and low-power electronic devices, offering reliable performance and long-lasting power.
- Laptops: Favored for laptops due to their high power output and extended lifespan, ensuring prolonged runtime.
- Vapes: In-demand for vapes and vaping accessories, providing the required high power levels for sustained usage.
- Electric Cars: Ideal for electric cars because of their large capacity, contributing to efficient and sustainable transportation.
- Drones: Lightweight and powerful, making them perfect for drones, delivering sustained power over extended periods.
21700 vs 18650 battery, which is better for LEV?
The 18650 cell is one of the most popular types of rechargeable lithium-ion batteries, and for good reason. There are many advantages to the 21700 lithium batteries, but they also carry a higher price tag. They are readily available and affordable.
Is it possible to charge 21700 batteries with an 18650 charger?
You can charge 21700 batteries in an 18650 charger, but we recommend using a dedicated 21700 charger whenever possible.
Does 21700 last longer than 18650?
The answer is simple: Yes, the 21700 battery generally outranks its 18650 counterpart in terms of longevity. This can be attributed to its higher capacity and energy densities. As a result, this type of lithium-ion battery can store more energy, leading to longer runtime than a lower capacity 18650 cell. Of course, the durability of a battery depends on many factors – usage frequency, storage conditions, and device specs – so it may not always be the case that 21700 models have more longevity than 18650 batteries.
How to choose the right battery for LEV
When it comes to choosing the right battery for your LEV, there are a few things you need to take into account. A professional lithium-ion battery manufacturer, Redway offers a wide range of battery packs for various drive systems, including electric bikes, electric scooters, electric motorcycles / mopeds, golf carts, wheelchairs, and cargo bikes. Our battery packs are usually sorted by voltage.
The 36V lithium battery packs we offer for electric bikes and electric scooters are shaped into slim frame-mounted electric road bikes and mountain bikes. A battery pack in the tube is an excellent choice if you want a battery hidden within the electric bike, as well as high output, light weight, and a small volume.
Conclusion
Battery technology is constantly evolving, and it can be difficult to keep up with the latest advances. We hope this article has given you a better understanding of two popular battery types–the 21700 and the 18650. While both are great options for electric vehicle applications, each offers its own unique advantages. Ultimately, the choice between these two batteries will depend on your specific needs and preferences. Whatever type of battery you choose, make sure to do your research and understand what features it offers so that you get maximum performance from your LEV system!
