26650 and 18650 are common lithium-ion battery sizes often used in devices like flashlights, electric toys, and laptops. Understanding their differences can help you make better choices for specific applications.
Overview of 26650 Battery
Common Applications:
Due to their large capacity and high discharge rate, 26650 batteries are widely used in high-brightness flashlights, electric toys, power tools, and portable power sources.
Size:
26650 batteries have a diameter of 26mm and a length of 65mm, making them larger than 18650 batteries. This extra size allows for greater capacity and longer runtime.
Types:
26650 batteries use lithium-ion chemistry, providing high energy density and excellent discharge performance. Depending on the application, they may use chemistries like LiFePO4 or Lithium Manganese Oxide for different power requirements.
Overview of 18650 Battery
Size:
18650 batteries have a diameter of 18mm and a length of 65mm, making them suitable for compact devices.
Types:
These batteries also use lithium-ion chemistry, with common variants including Lithium Manganese Oxide and LiFePO4, catering to various needs.
Common Applications:
18650 batteries are widely used in laptops, power tools, e-cigarettes, flashlights, and other portable devices, appreciated for their stability and moderate size.
Further reading:
What does the code on the battery mean?
Key Differences Between 26650 and 18650
- Size:
26650 is larger with a 26mm diameter, while 18650 has an 18mm diameter. Both have a 65mm length. - Capacity:
26650 batteries typically offer capacities of 4000mAh to 6000mAh, whereas 18650 batteries range from 2000mAh to 3500mAh. - Discharge Ability:
26650 batteries often have higher discharge rates, suitable for high-power devices, while 18650 batteries are better for smaller electronics.
Which Has a Longer Lifespan?
The lifespan of both batteries is measured in charge cycles, where one cycle is a full charge and discharge. Typically, there’s no significant lifespan difference between 26650 and 18650, as it depends on the chemistry and usage habits. LiFePO4 cells usually offer more than 2000 cycles, while Lithium Manganese Oxide cells range from 500 to 1000 cycles. However, due to its larger capacity, a 26650 battery can deliver more power per cycle, potentially lasting longer in terms of usage duration compared to 18650.
Further reading:
Which battery has the longest cycle life?
How to extend the cycle life of lithium batteries?
Can You Replace 18650 with 26650?
Yes, in some cases, you can replace an 18650 battery with a 26650, provided there is enough space in the device to accommodate the larger size. However, you must also ensure the device supports the higher voltage and capacity to prevent damage.
Is 26650 Better than 18650?
26650 batteries excel in capacity and runtime, making them better for applications requiring longer operation. However, the choice depends on the application. If you need longer battery life and have space, 26650 is preferable. For compact, lightweight devices, 18650 is more suitable.
Is 26650 lithium battery an upgrade solution for 18650?
It depends on your upgrade route. If you want your product to be lighter, then 18650 battery is more selective than 26650. But if you want your next generation product to have longer-lasting power, then the large capacity of 26650 will help you achieve your goal.
A closer comparison
If you are making a decision, you can contact lithium-ion battery suppliers to provide you with useful suggestions and solutions. PKNERGY has 18 years of experience in lithium battery pack production, providing reliable and affordable design solutions for various industries. We also provide lithium-ion battery wholesale. Contact PKNERGY now to get 26650 lithium-ion battery or 18650 battery samples for testing and determine your final solution.
Conclusion
Both 26650 and 18650 batteries have their distinct advantages. 26650 batteries offer higher capacity and power output, ideal for devices needing long runtime and high power. 18650 batteries are better suited for compact devices due to their smaller size. Choosing between the two should be based on the device’s requirements, space constraints, and runtime needs, ensuring optimal performance and safety.
Post time: Oct-22-2024