Why can't you always trust the Puff count of a one-time Vape

If disposable e-cigarettes can always last 8000 or even more times, that would be great, but the fact is, in practice, disposable e-cigarettes often fail to reach the number of puffs advertised. There are many reasons for this, but the most common one is that people sometimes smoke e-cigarettes for a long time. When manufacturers say that their devices can sustain a certain number of suction cycles, this statement assumes that each suction will last for approximately one second. However, it is common for people to smoke deeper than this when using e-cigarettes.
How much Vaping is just too much
For example, suppose the advertising capacity of a given disposable e-cigarette is 4000 units. This sounds like a huge number, as 4000 puffs may be equivalent to two whole boxes of cigarettes. However, let's imagine that your average suction time is 4 seconds, not 1 second. In this case, you should actually expect a 4000 pack disposable e-cigarette to provide 1000 packs - approximately equivalent to five packs of cigarettes. This is still an impressive capacity, but it means you may use the device for about five days instead of a few weeks.
Buying a device and expecting it to be used for a specific number of days before replacement is a bad idea until you know the average usage time of a disposable e-cigarette. Although you are still learning about your personal e-cigarette model, it is always wise to purchase e-cigarettes that require more than you imagine. In this way, if your last device accidentally runs out of e-cigarette juice, you won't have to collapse and buy a pack of cigarettes.