How much nicotine is in disposable e-cigarettes?

Nicotine levels in e-cigarettes vary widely, with some matching or exceeding nicotine levels in combustible cigarettes.
Not always a reliable indicator of nicotine levels, as scientific studies have shown that mislabeling is a common problem in this category.
The way e-cigarettes are used or modified can also affect the delivery of nicotine to individual users.

Some vaping products deliver nicotine as effectively as cigarettes. The use of nicotine salts also lowers the pH of the e-liquid, which also allows higher concentrations of nicotine to be delivered with less irritation. For example, the maker of Max claims the product has the same nicotine levels as traditional cigarettes, and that it delivers nicotine 2.7 times faster than other e-cigarettes.

In the US, Max devices initially launched with 5% nicotine salt pods. Hot on its heels, Max competitors began offering nicotine salt concentrations of up to 7 percent in what has been dubbed the “nicotine arms race.” As everyone knows, in 2019, Max launched a lower nicotine pod with a nicotine concentration of 3%. Popular single-use devices such as PuffBars use nicotine salts and are sold in strengths of up to 5 percent nicotine.

The MK BAR e-cigarette is a new type of fashion and healthy product which is powered by a 650mAh battery with an output of 3.2V.
Built-in Mesh Coil.

It also features a unique Type-C USB rechargeable port and can be recharged at any time and anywhere. Disposable Rechargeable Device Vape
The MK BAR has More than 30+ flavours: Watermelon Ice, Latte Vanilla, Green Apple Ice, Lychee Ice, Coke Ice, Red Bull Ice, Pink Lemon, Apple&Peach&Pear, Cherry&Cola, Blueberry&RAZZ, Lime Mojito, Mint, Blueberry, Blood Orange&Grapefruit, Cranberry Grape&Grapefruit, Blackcurrent Fizz, RAZZ&Grapefruit, Strawberry&Kiwi