batteries for e-cigarettes at happy-smoke

The most common sizes used today are 18350, 18650 and 16850. They differ in size as well as capacity and are purchased to fit the respective device.

The commonly used batteries differ in protection (protected) or not (unprotected).

The protected lithium-ion batteries are protected against incorrect voltage (no overvoltage higher than 4.2 V and no undervoltage lower than 3 V) and short circuit. However, if such a protected battery is stored in a discharged state for a long time, it loses its protection and can no longer be considered safe. This type of battery needs a small elevation on the terminal (nipple) to function - since it stands up, such batteries do not fit in all devices. although most solve the problem with a spring in the lid.

Unprotected batteries, you guessed it, do not have any safety measures. If not handled carefully, they can outgas, which in turn could lead to explosions, were it not common for such batteries to have a vent hole.

Horror reports, such as those that regularly appear in the media involving exploding batteries or fires, are almost always based on improper handling of the batteries. If you take care of them (i.e. repair them if the case cracks) or do not use them if they are damaged, you are on the safe side. By the way, it is also important to note that batteries are best transported in a small case, so that they do not come into contact with other metallic objects such as car keys and discharge.

Again and again, horror news in the style of "e-cigarette exploded in your face" startles you. In 80% of such cases, the cause is improper use of the battery.

General advice:

A rechargeable battery is not a toy. Please keep the battery out of the reach of small children.
Charge the battery only under supervision and never near flammable objects. During charging, the battery must be placed on a solid, non-flammable surface. The battery must not be covered. Keep flammable objects away from the battery.
The rechargeable battery must not be overcharged. To charge the rechargeable battery, use only chargers that are approved for charging the respective rechargeable batteries and that terminate the charging process accordingly when the final charging voltage is reached.
Never open the rechargeable battery, as this may result in an internal short circuit and there is a risk of explosion.
Avoid short-circuiting the battery by not bringing the thread or the poles of the battery into contact with metallic or other conductive objects.
Do not expose the battery to fire, water or other liquids.

For heating and vaporization of an e-cigarette, rechargeable batteries are necessary as energy suppliers. Basically, there are 2 types: the rechargeable ones, which are used in battery carriers, and the fixed battery units, which are permanently installed with the electronic unit and cannot be removed.

Most devices today come with clocked batteries, which means that the battery provides a constant power over the entire period of use until it is discharged. With regulated batteries, the steamer can manually adjust the power as desired.

The majority of batteries used today are lithium-ion batteries, which are light and durable and are not subject to memory effect (so can be used immediately).

However, these batteries should not be allowed to fully consume energy, because this so-called deep discharge massively shortens the life of the battery. Too high a charge during longer storage is also not advisable, as this will cause the battery to age all the more quickly. It makes sense to charge the battery between 60 and 80% and to store it cool, dry and separate from other batteries.

If batteries are stored and used correctly and nothing is tampered with on the device, it is safe to use.