Relx Ultra 600 vs Relx 12K Ultra Kit Comparison

August 3, 2026

Relx Ultra 600 Puffs vs Relx 12K Ultra Kit – compare puff count, battery life, flavour, value and performance to choose the best vape kit for your needs.

Vaping isn't so easy as it used to be of just picking a flavour. As the UK vaping industry has shifted away from the disposable e-cigarette to the rechargeable prefilled pod kit format, many adult vapers are making comparisons between the two, especially when the higher capacity pods are newer than the compact ones. The most popular comparison is between Relx Ultra 600 Puffs Prefilled Pod Kit and Relx 12K Ultra Kit.

Both products are from the same reputable brand, but are intended for different users. Relx Ultra 600 is designed in such a way that it is easy to use and portable, while the Relx 12K Ultra Kit is designed to last, provide value and convenience.

If you're not certain which one is more appropriate for your vaping routine, then this guide is for you and is going to help you know the difference between the two.

Quick Comparison

Feature	Relx Ultra 600	Relx 12K Ultra Kit
Puff Capacity	Around 600 puffs	Up to 12,000 puffs
Battery	Built-in	Rechargeable USB Type-C
Charging	Not required	Required
Pod System	Single unit	Replaceable prefilled pods
Best For	Occasional Users	Regular Adult Vapers
Average Company Performance	4% of companies	5% of companies
Flavour Consistency	Good	Excellent
Daily Convenience	Very simple	High convenience with rechargeability

Understanding the Two Devices

Relx Ultra 600 is a small vape that comes with around 600 puffs prefilled. It gained popularity due to its lightness, ease of draw and nicotine salt experience.

The Relx 12K Ultra Kit is the next generation of vape technology using prefilled vape pens. It has prefilled pods that can be changed when necessary and a rechargeable battery which supports up to 12,000 puffs – and fits the UK regulations requirements.

While both products provide the same familiar and smooth Relx vaping experience, the ownership experience is quite unique.

Design and Portability

They both are pocket-friendly and smaller devices, but they have different priorities.

The Relx Ultra 600 is very light and light in design. No settings, charging cables or maintenance needed. Grownup vapers just open up the package after that they start vaping.

The Relx 12K Ultra Kit is still very portable, but with some extra luxurious enhancements. Its sizeable battery size doesn't compromise its hand-friendliness, and it's more durable and finished than its predecessor. This is a high-quality product, users find it to be of a high quality, and they find what they are buying to be a long-term solution, rather than a quick fix.

However, if you are looking to move it from place to place with the ultimate convenience the Ultra 600 is still quite appealing. The 12K Ultra Kit provides a more powerful packaged offering that will provide portability without losing performance.

Air Puffs and How Long.

The biggest disparity is here.

Depending on how one vapes, the Relx Ultra 600 delivers approximately 600 puffs. Heavy users might be able to use the device for a day or two; lighter users might be able to use it for a little longer.

With the Relx 12K Ultra Kit, you can get up to 12,000 puffs from the rechargeable system and replaceable prefilled pods. This drastically decreases the number of times users have to buy replacements.

This is great for all serious adult vapers as they have to stop less, swap devices less and experience a much easier day-to-day experience.

Battery Performance

Satisfaction is greatly influenced by battery performance.

The Relx Ultra 600 has an integrated battery that is designed to power it for its puff power only. When the battery and e-liquid are both used, that's the end of its usefulness.

This Relx 12K Ultra Kit comes with a rechargeable battery that can be charged via a USB Type-C cable as required. Users do not need to replace the whole device, rather, they just need to replace the battery and use pods that are compatible with the device.

This is a far more flexible option, particularly for those who use the vape all day long and want something portable they can use while on the go!

Flavour Consistency

As vaping devices begin to get older, their flavour quality can often alter, which many adult vapers have observed.

The Relx 12K Ultra Kit has been conceived to keep flavour consistency for much longer. Smoother and more balanced puffs come from advanced heating technology, which also minimises flavour loss over prolonged use.

If you prefer a great taste, the new kit is likely to provide more uniform vaping.

Everyday Convenience

The convenience is different for various consumers.

The Ultra 600 is fully user friendly. No charging, refilling or replacement is needed. Unpack and begin vaping right away.

The 12K Ultra Kit does need batteries to be charged from time to time but the maintenance, although minimal, is worth it. Users don't need to bring several devices to school during the week, just recharge the battery and change the pods as needed.

This system is much more convenient for many regular adult vapers, in the long term.

Running Costs

The first cost purchase should not be the only one that should be considered when assessing price.

It's possible that a smaller vape with fewer puffs might seem more affordable in the short run, but with repeated replacements, you might end up spending more in the long-term.

The Relx 12K Ultra Kit is typically more economical in the long run due to the fact that it can be used for a long time, and you only need to purchase replacement pods.

Frequent users typically find that the cost per puff of this type of device is significantly less than that of continually purchasing lower capacity devices.

Environmental Considerations

The UK vaping industry is on an increasing journey towards more sustainable alternatives.

Because there are electronic components in a finished single use product, which are thrown away, and there is a battery in each unit, lower-capacity products create more E-Waste.

Pod systems that are rechargeable reduce the amount of unnecessary battery waste, since users can use the same system, but change the compatible pods as necessary.

While none of the vaping products are truly non-waste, rechargeable systems are a more environmentally friendly option for adult consumers.

Which device is going to be superior for beginners?

They're both easy to use, since they're activated by drawing.

It's the simplest introduction, as with Relx Ultra 600 there is practically no learning curve.

But after a short time, many new adult vapers have found that it would be more practical to start using a higher capacity rechargeable pod kit. If the battery needs to be charged from time-to-time, it's a minor tweak that can make things more convenient and cost-effective.

For those who use the product regularly, which one is better?

These Relx 12K Ultra Kits are ideal for regular adult vapers.

It is much more suitable to use on a daily basis than the original due to higher puff capacity, rechargeable battery, longer life, better flavour consistency, and lower long-term running costs.

Regular vapers may find that they don't need to invest in a new device every 2 or 3 days.

Final Verdict

Ultimately, the best one would be based on how many times you vape.

For those who only vape now and again, and want the simplest vape experience without charging, Relx Ultra 600 is a convenient and easy choice.

But for the vast majority of normal adult electronic cigarette users, the Relx 12K Ultra Kit is a much better value. It has a rechargeable battery, a long puff duration, a stable taste and replaceable pods, making it more economical for long-term use.

As vaping laws in the UK have continued to promote rechargeable alternatives, many adult users have opted to use higher capacity prefilled pod kits, as they offer a higher level of convenience, reliability, and value in the long run. When it comes to minimizing replacements, ease of use during normal usage, and cost-efficient vaping, Relx 12K Ultra Kit is the superior choice.

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