Most e-cigarette batteries are external lithium batteries, and some e-cigarette hosts have lithium batteries or model airplane batteries built in. External lithium batteries are mostly of the following four types: 18650,18500,18350 and 26650.

The type 18650

The originator of lithium-ion battery (a standard lithium-ion battery model set by SONY in Order to save cost)

The number 18 indicates a diameter of 18mm, 65 indicates a length of 65mm, and 0 indicates a cylindrical battery. The capacity is generally 1200mah~3600mah. Most electronic cigarette devices use this kind of battery, such as mechanical rod, pressure regulating rod and pressure regulating box.

The type 18500

18 indicates a diameter of 18mm, a length of 50mm, and 0 indicates a cylindrical battery. The battery has a smaller capacity and less use, with only a few mechanical rods;

The type 18350

The number 18 indicates a diameter of 18mm and a length of 35mm, and 0 indicates a cylindrical battery. This battery has the smallest capacity, but it has the smallest volume to reduce the size of the device, so there are few mechanical rods or pressure regulating rods;

The type 26650

The number 26 indicates a diameter of 26mm and a length of 65mm, and 0 indicates a cylindrical battery. This kind of battery has the characteristic of large capacity, a few voltage regulator boxes can be used;

Plus: Advantages of lithium batteries

1, large capacity, 18650 lithium battery capacity is generally 1200mah~3600mah, and the general battery capacity is only about 800mah;

2, long life, 18650 lithium battery life is very long, normal use cycle life can reach more than 500 times, is more than twice the ordinary battery;

3, high safety performance, 18650 lithium battery high safety performance, no explosion, no combustion; Non-toxic, pollution-free, after RoHS trademark certification; All kinds of safety performance in one go, the cycle times is more than 500 times; High temperature resistance, 65 degrees of power down efficiency of 100%. The positive and negative electrodes of the 18650 lithium battery are separated to prevent short circuits. So the chances of it short-circuiting are extremely low. Protective plate can be added to avoid overcharging and overreleasing the battery, which can also prolong the service life of the battery;

4, high voltage, 18650 lithium battery voltage is generally in 3.6V, 3.8V and 4.2V, much higher than the 1.2V nickel-cadmium and ni-Mh battery voltage;

5, no memory effect, no need to empty the remaining power before charging, easy to use;

6, small internal resistance, polymer cell internal resistance is smaller than the general liquid cell, domestic polymer cell internal resistance can even do 35m ω below, greatly reduce the battery consumption, extend the standby time of the mobile phone, can fully reach the level of international standards. This kind of lithium polymer battery which supports large discharge current is the ideal choice for remote control model and becomes the most promising product to replace nickel-metal hydride battery.

7, can be in series or combined to synthesize 18650 lithium battery;

8, wide range of use: notebook computers, walkie-talkie, portable DVD, instrumentation, audio equipment, model aircraft, toys, video cameras, digital cameras and other electronic equipment can be used.