How to Choose Between 18650, 18500, 18350, and 26650 Batteries for Vapor Vaping Devices

The batteries used in electronic cigarettes are mostly external lithium batteries, while some devices have built-in lithium batteries or RC model batteries. The external lithium batteries mainly come in four models: 18650, 18500, 18350, and 26650.

1

18650 Type

The pioneer of lithium-ion batteries (a standard lithium-ion battery model set by Sony in Japan to save costs).

The number 18 indicates a diameter of 18mm, 65 indicates a length of 65mm, and 0 indicates a cylindrical battery. The capacity generally ranges from 1200mAh to 3600mAh, and most electronic cigarette devices use this type of battery, such as mechanical mods, variable voltage mods, and regulated boxes;

2

18500 Type

The number 18 indicates a diameter of 18mm, and the length is 50mm, with 0 indicating a cylindrical battery. This battery has a smaller capacity compared to the 18650 and is used less frequently, with only a few mechanical mods utilizing it;

3

18350 Type

The number 18 indicates a diameter of 18mm, and the length is 35mm, with 0 indicating a cylindrical battery. This battery has the smallest capacity but also the smallest size, which can reduce the size of the device, so it is used by a few mechanical mods or variable voltage mods;

4

26650 Type

The number 26 indicates a diameter of 26mm, and the length is 65mm, with 0 indicating a cylindrical battery. This battery is characterized by its large capacity and can be used by a few regulated boxes;

Appendix: Advantages of Lithium Batteries

1、Large Capacity, the capacity of the 18650 lithium battery generally ranges from 1200mAh to 3600mAh, while the capacity of ordinary batteries is only about 800mAh;

2、Long Lifespan, the lifespan of the 18650 lithium battery is very long, with a cycle life of over 500 times under normal use, more than twice that of ordinary batteries;

3、High Safety Performance, the 18650 lithium battery has high safety performance, does not explode, does not burn; non-toxic, non-polluting, certified by RoHS; various safety features are integrated, with cycle counts greater than 500; good high-temperature resistance, with discharge efficiency reaching auto at 65 degrees. To prevent short-circuiting, the positive and negative terminals of the 18650 lithium battery are separated. Thus, the possibility of short-circuiting has been minimized. A protection board can be added to prevent overcharging and over-discharging, which can also extend the battery's lifespan;

4、High Voltage, the voltage of the 18650 lithium battery generally ranges from 3.6V, 3.8V, to 4.2V, far exceeding the 1.2V voltage of nickel-cadmium and nickel-metal hydride batteries;

5、No Memory Effect, there is no need to fully discharge the remaining power before charging, making it convenient to use;

6、Low Internal Resistance, the internal resistance of polymer cells is lower than that of general liquid cells, and domestic polymer cells can even achieve internal resistance below 35mΩ, greatly reducing the battery's self-discharge and extending the standby time of devices. This type of polymer lithium battery, which supports high discharge currents, is an ideal choice for remote-controlled models and is the most promising product to replace nickel-metal hydride batteries;

7、Can be Connected in Series or Parallel to form 18650 lithium battery packs;

8、Wide Range of Applications: laptops, walkie-talkies, portable DVDs, instruments, audio equipment, RC models, toys, cameras, digital cameras, and other electronic devices can all use this battery.