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A review of all disposable pod boasting a large capacity of 40,000 puffs!

KEYSTONE TEAM
28.11.2025

Hello everyone~! This is KEYSTONE, the e-cigarette brand from China! Today, I’m here with some hot and new news, and greeting you all!

That’s right! The FLEX-3 pod system with replaceable pods has just been released!
It’s incredibly portable and easy to use, and boasts a puffing 40,000!

The lineup of flavors is also diverse, and I’ve been really looking forward to it even before I started vaping!

Shall we take a look right now?

First, let me introduce you to the product specifications!

FLEX-3 E-Cigarette Product Specifications
Battery Capacity: 1,100mAh
Puffs: Approximately 40,000
Output: 3-Level Adjustable
22W-26W-28W
Charging Type: TYPE-C
I’ve compiled the product specifications for easy, at-a-glance viewing.

The most striking feature is the 1,100mAh battery capacity! Even for heavy users, it is enough for all day long.

It even boasts a massive capacity, capable of holding up to 40,000 puffs! It’s a great value! It’s enough to easily last 2-3 weeks, so I’m very satisfied with the longevity.

Of course, the puff counts and charging interval will vary from user to user, so please keep in mind that variations may exist!

The charging method is a Type-C port at the bottom, and slow charging is recommended.

Now that we’ve taken a closer look at the product specifications, let’s take a look at how to use it.

How to Use the Flex-3 E-Cigarette
If you look at the inner connection area of the battery, you’ll see a small green button! Press the green button inside the battery once to change the output. The output can be adjusted to three levels: Eco (22W), Normal (26W), and Turbo (28W).
Press the green button for 3 seconds to light up/ light out the light bar.
Press the button 5 times within 1.5 seconds to turn on or turn off the device.

Check the output power and the battery level on the display.

Adjust the airflow for a more intense inhalation.


Replaceable pod, 1s quick switch, it’s incredibly easy to use!
It uses a magnetic pod that holds the e-liquid and a battery! There’s no need for separate e-liquid refilling, so you can simply replace the e-liquid pod when it runs out, no maintenance at all.

Furthermore, unlike the traditional sponge-type e-liquid, it contains the e-liquid itself, so you can enjoy vaping down to the last drop.
Additionally, the pod’s interior is transparent, so you can directly check the remaining e-liquid level!

The flavor lineup consists of 15 different flavors, and they’re quite comprehensive. From sweet fruity notes to menthol and cigar notes! I’m sure there’s something for everyone 🙂

The overall flavor is rich and intense, making this a product that captures every flavor.

Please feel free to contact~!
E-mail address: [email protected]

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