What’s the Difference: 26650 Battery Vs 18650 Battery

26650 are bigger(26mm) than 18650(18mm) with more capacity.


1. Size:

26650 Battery: These batteries have a diameter of 26mm and a length of 65mm. They are larger and heavier than 18650 batteries.

18650 Battery: The 18650 batteries have a diameter of 18mm and a length of 65mm. They are smaller and lighter compared to 26650 batteries.

2. Capacity:

26650 Battery: Due to their larger size, 26650 batteries generally have a higher capacity, ranging from 3,000mAh to 5,500mAh or more.

18650 Battery: The capacity of 18650 batteries typically ranges from 1,800mAh to 3,500mAh.

3. Current Rating:

26650 Battery: These batteries can have higher current ratings compared to 18650 batteries, making them suitable for high-drain devices. The continuous discharge rate can range from 20A to 45A or more.

18650 Battery: The continuous discharge rate of 18650 batteries usually ranges from 10A to 30A, depending on the model.

4. Applications:

26650 Battery: Due to their higher capacity and current rating, 26650 batteries are often used in high-drain devices such as powerful flashlights, e-cigarettes, power tools, and electric vehicles.

18650 Battery: These batteries are commonly used in laptops, portable electronics, flashlights, e-cigarettes, and power banks.

5. Availability:

26650 Battery: While 26650 batteries are available on the market, they are less common than 18650 batteries.

18650 Battery: The 18650 battery is more widely available and popular compared to the 26650 battery.


In the case of the 18650 Battery, 18 represents a diameter of 18mm and 65 shows the length of 65mm; whereas 0 indicates that it is a kind of cylindrical battery. Similarly, in the case of 26650 battery, 26 represents the diameter of 26mm, 65 indicates 65mm length and 0 is again the indicator of cylindrical battery. Due to their larger size, these batteries are capable enough to deliver higher power, even if attached to a small flashlight. Therefore, the main selection parameter must be the diameter of the battery.


The capacity of the 18650 lithium-ion rechargeable battery is somewhere around 1200mAh to 3600mAh. This capacity is usually supported by most of the vape box mods such as mech mods as well as regulated box mods. On the other side, the 26650 lithium-ion rechargeable batteries come with a large capacity in comparison to the 18650 Battery. Therefore, they can be used for VV vape box mods.


The most powerful lithium-ion 18650 rechargeable batteries can take up to 4.4V maximum. Their charge current can be around 0.5 times the battery capacity. On the other side, the 26650 batteries are made up of Lithium Manganese Oxide material and they can achieve a nominal voltage of around 3.6 to 3.7 volt per cell. However, the suggested charging voltage can be up to 4.2 volts.


Which battery do you need to choose?

The selection of the best battery type usually depends upon the requirements and needs of an individual. It is important to mention that at present time, 18650 rechargeable batteries are more famous because they carry more power and can serve today’s high-tech flashlights.

However, the size, style, and capacity of these batteries usually vary from brand to brand. On the other side, the 26650 rechargeable batteries are high-performance, high-capacity batteries that can serve high-drain devices in a much better manner. It is better to read the guidelines and instructions provided by manufacturers for electronic devices first and then choose the relevant rechargeable battery to ensure trouble-free operation.

It is important to mention that rechargeable or lithium-ion batteries are one of the most popular choices these days. They are widely used in electronic devices, electric vehicles, and other portable unit.

123, 123a
26650 Battery Vs 18650
14500 Battery Vs 18650
14500 vs AA
Overcharge Protection