Exploring Lithium Battery Dimensions: Different Battery Sizes
Mar. 12, 2025
Part 1. Lithium-Ion Cell Sizes
Common Dimensions of Lithium-Ion Cells
Lithium-ion battery cells are widely used as rechargeable energy storage units in electronics, electric vehicles, and energy storage systems. The most common types include cylindrical, prismatic, and pouch cells, each with distinct dimensions and characteristics.
Comparison of Lithium-Ion Cell Sizes
Lithium-ion battery cells have diverse applications in electronic devices such as LED art, digital watches, automobile remotes, and computer motherboards. As they become an essential part of daily life, understanding their specifications and applications is crucial for selecting the right power source. Below is a detailed table of commonly used lithium-ion battery cells.
Part 2. Lithium-Ion Battery Sizes
Common Dimensions of Lithium-Ion Battery Sizes
Lithium-ion batteries have transformed the electronics industry and come in various standard dimensions. Their size is typically represented by a combination of numbers indicating height, width, and thickness (all in millimeters).
These batteries are widely used across industries, from consumer electronics to electric vehicles. The most common sizes include 18650 (18mm diameter, 65mm length), 21700 (21mm diameter, 70mm length), and 26650 (26mm diameter, 65mm length).
Lithium-Ion Battery Size Comparison
Lithium-ion batteries are essential for portable electronics and energy storage due to their high energy density, lightweight design, and long cycle life. Understanding their sizes, specifications, and applications helps in selecting the right power source for specific devices.
The table below provides a detailed comparison of various rechargeable lithium-ion battery sizes, including their capacities, dimensions, and common applications. Whether for small gadgets or high-capacity storage systems, this guide offers insights into the available options.
Battery Size | Similar Size | Capacity (mAh) | Diameter (mm) | Length (mm) | Uses |
10180 | N/A | 70 – 100 | 10.1 | 18 | Used in small electronic devices like Bluetooth earphones, keychain flashlights, and other miniature gadgets. |
10440 | AAA | 250 – 350 | 10 | 44 | Mainly used in mini electronic products such as tiny flashlights, mini stereos, loudspeakers, etc. |
14500 | AA | 700 – 1000 | 14 | 50 | Consumer electronics such as LED flashlights, wireless audio, electric toys, digital cameras, etc. |
16340 | CR123A | 400 – 900 | 16 | 34 | LED flashlights, headlights, laser lights, etc. |
18350 | N/A | 700 – 1200 | 18 | 35 | Commonly used in vaping devices, portable flashlights, laser pointers, and electronic toys. |
18490 | N/A | 1200 – 1500 | 18 | 49 | Usually used in high-powered LED flashlights, portable power banks, and emergency lighting systems. |
18650 | / | 1500 – 3500 | 18 | 65 | Used in many laptop computer batteries, cordless power tools, certain electric cars, electric kick scooters, most e-bikes, vaping, and LED flashlights. |
21700 | / | 3000 – 5000 | 21 | 70 | E-bikes, solar street lights, LED lights, portable power tools, etc. |
26650 | / | 2400 – 5750 | 26 | 65 | For radio control hobby use. Also used in larger, high-powered LED flashlights and some electronic cigarettes. |
32700 | N/A | 6000 – 9000 | 32 | 70 | Suitable for high-capacity energy storage applications like electric vehicles, solar energy storage, and large-scale backup power systems. |
32650 | / | 5000 – 6500 | 32 | 67.7 | Generally best for backup power supply, UPS batteries, wind power generation systems, electric toys, and wind-solar complementary power generation systems as well. |
38120 | N/A | 8000 – 12000 | 38 | 120 | Have Applications in high-capacity energy storage systems, such as electric vehicles, large-scale renewable energy storage, and UPS backup systems. |
40152 | N/A | 10000 – 15000 | 40 | 152 | Particularly designed for high-capacity energy storage applications like electric vehicles, solar energy storage, and large-scale backup power systems. |
Part 3. Largest Battery Size
Certain applications require high-energy storage, making large lithium-ion batteries the ideal choice. These include electric vehicles, industrial backup power, and renewable energy storage systems. Large-sized batteries are designed with advanced lithium chemistries to enhance battery life and performance.
Part 4. Smallest Battery Size
While large batteries are used for high-energy applications, smaller lithium batteries are ideal for IoT devices, wearable technology, and compact electronics. They deliver sufficient power in a small form factor, enabling the development of portable and lightweight gadgets.
Part 5. Conclusion
In summary, lithium-ion batteries come in various sizes, catering to both small and large applications. Choosing the right size depends on your specific needs. Understanding battery capacities is essential, whether it's a large 48V 100Ah LiFePO4 battery for high-demand tasks or a compact 3.7V 300mAh lithium-ion battery for small electronics. Selecting the right battery ensures optimal performance.
Part 6. FAQs
Which are the most common lithium-ion battery sizes for electronics?
The most common lithium battery sizes for electronics are 18650, 21700, and lithium polymer pouch cells.
Are Lithium-Ion Battery Sizes Smaller Than Other Types of Batteries?
Yes, lithium-ion batteries are generally smaller and lighter compared to traditional battery chemistries like lead-acid or nickel-metal hydride.
Can Lithium Battery Sizes Affect Device Performance? How?
Yes, selecting the right lithium battery size is crucial, as it impacts the device’s runtime, power output, and overall performance.
What Are the Standard Dimensions for Lithium Battery Cells Used in Electric Vehicles?
Commonly used sizes in electric vehicle battery packs include 18650 and 21700 cells.
How Do I Choose the Right Lithium Battery Size for My Application?
Consider factors such as required capacity, available space, voltage requirements, and weight restrictions to select the most suitable battery size.
What Safety Measures Should Be Taken When Using Lithium Batteries of Different Sizes?
Always follow manufacturer guidelines, avoid physical damage, and use proper charging and storage practices to minimize the risk of fire or explosion.