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WARNING: Vaping products contain Nicotine, a highly addictive chemical - Health Canada
WARNING: Vaping products contain Nicotine, a highly addictive chemical - Health Canada

UWell Caliburn A3S Unboxing + Review


Christopher Fournier


Oct 12, 2023

UWell Caliburn A3S Unboxing + Review

Summary of Key Points:

  • The UWell Caliburn A3S is a new, beginner-friendly pod system in the Caliburn series. It features an aluminium alloy chassis, 2mL capacity pods, draw-activated firing, and an LED battery life indicator built into the logo.
  • The A3S has an intuitive and minimalist design that eliminates buttons to reduce accidental firing and offers a discreet, portable vaping experience.
  • Setting up and using the A3S is simple. The device is compatible with A3 pods, and the 2A fast charger fully charges the 520mAh battery in 25-30 minutes.
  • The A3S provides a pleasant MTL vaping experience with surprisingly good cloud production and flavour. DTL vaping is also possible if you use the 1.0Ω pod and freebase e-liquid instead of nic salt e-juice.
  • The A3S is a solid and accessible entry in the Caliburn series, especially for new users. U Vape also carries a wide range of other pod systems—browse our collection today.

UWell Caliburn A3S Unboxing + Review

UWell has always made approachable and user-friendly pod systems, including their popular Caliburn series. The UWell Caliburn A3S is one of the newest devices in that line—promising a simple and easy experience specifically geared towards new users.

But does the Caliburn A3S live up to these claims? We got down to business with one of them to find out. Here’s our review of this sleek new device from UWell, including a breakdown of its key features and our recommendations on who it’s best for.

See Also:

UWell Caliburn A3S device in packaging

Each Caliburn A3S Kit Includes:

  • 1 x Caliburn A3S Pod System
  • 1 x 0.8Ω Caliburn A3 Pod
  • 1 x 1.0Ω Caliburn A3 Pod
  • 1 x User Manual
UWell Caliburn device with pod nearby

Key Features of the UWell Caliburn A3S Pod System

The UWell A3S offers:

  • An aluminium alloy chassis
  • 2mL capacity pods
  • An intuitive draw-activated firing mechanism
  • An LED battery life indicator
  • An e-liquid viewing window
  • Magnetic pod connection
  • 2A fast charging
  • With no buttons to push by accident and magnets holding the pods in place to prevent accidental disconnection, this device is clearly engineered to reduce friction for new users. Read on for more of our first impressions.

User holding UWell Caliburn A3S pod system

First Impressions of the UWell Caliburn A3S

Look & Feel

The aluminium alloy casing on the A3S means that while it may be lightweight, it’s still made from stern stuff. The matte coating and fine detail work also make it feel like a premium product—and all of this fits into an extraordinarily compact little package at 109.8mm x 21.3mm x 11.7mm.

Another nice new feature is the battery indicator light, which is integrated into the device’s logo. You’ll see the word “Caliburn” in different colours depending on how much charge is left in the battery:

  • Green: 60-100%
  • Blue: 30-60%
  • Red: Less than 30%

Meanwhile, the extremely minimalist design of the A3S gives it an elegant appearance—and while some people prefer their vape devices to be covered in buttons and screens, we think this is appropriate for a beginner-friendly vape.

Don’t get us wrong; we liked the firing buttons on other versions of the Caliburn—but not having one certainly eliminates the risk of accidentally firing up the A3S when it’s in your pocket or purse. Smooth moves, UWell.

Ease of Use

The A3S is made and marketed as a user-friendly device, and we’re happy to report that it doesn’t disappoint in this regard. Fill the pods from the top, pop them into the top of the device, and simply take your first draw. It’s like vaping with an automatic transmission!

Not only does this remove the risk of accidentally firing up the device when you don’t want to—it also gives the A3S a pleasantly discrete vibe. If you’re looking for a simple and portable vape you can use quickly without drawing tons of attention to yourself, there’s a lot going for this model already.

UWell Caliburn A3S pod system standing upright with pod installed

Using the UWell Caliburn A3S

Setting up the A3S is about as simple as it gets for a pod system. It’s compatible with A3 pods, so once you’ve filled one up with your chosen e-liquid and popped it in, all that remains is to make sure your device is charged and start enjoying it.


One of our favourite features on the A3S is how quick and easy it is to refill the battery. The supplied 2A fast charger will take you all the way to 100% in just 25-30 minutes, which means less time waiting and more time vaping.

Pod Filling & Setup

A3 pods fill from the top, which makes putting in e-liquid easy and helps prevent leakage. This isn’t a new feature, since the A3 pods have been available for a while—but it’s still just as nice as it ever was.

Meanwhile, the e-liquid window gives you a nice view of how much juice you have left, and the pods hold 2 mL of your chosen e-liquid. For best results, you’ll want to use a 50/50 nic salt e-liquid or one with a higher PG concentration.

Buy Nic Salt E-Liquids Here

Draw Quality

You get a pleasant, easy MTL vaping experience here, just as promised. This isn’t a sub-ohm device, but the throat hit is nice and strong, and you’ll enjoy larger clouds than you might expect from a device so unassuming.

You can do DTL here as well, although it’s obviously not the intended application for the device. It won’t do any damage, though—so if you’re really in the mood, go for it! Just make sure you use a freebase e-liquid instead of nic salt e-juice.

Buy Freebase E-Liquids Here


The A3S should last you most of a day on a full charge. You shouldn’t expect marathon-level performance from that 520mAh battery at 16W—but again, that’s not really the point here. This is supposed to be a device you can pack up, carry around, charge quickly, and enjoy in short bursts without having to overthink the experience. A day or so of use per charge is just fine.

UWell Caliburn A3S lying on notebook near smartwatch and wireless earbuds

Should You Buy the UWell A3S?

Honestly, that depends on you. If you’re new to vaping and looking for something uncomplicated, this little pod system could be your new best friend. If you’re a box-mod loving, cloud-chasing vape veteran from way back, you’re probably going to be happier with something a little more intricate and customizable.

But taken on its own merits and bearing in mind its intended purpose, the A3S is a solid entry by UWell into their Caliburn series. It’s significantly less expensive than other Caliburn devices as well, so think of it as the most accessible way to enter the market for this popular and enduring series.

Find Your Caliburn A3S

Frequently Asked Questions about the Caliburn A3S

Why is my battery indicator light flashing?

The battery indicator light on the Caliburn A3S flashes while you’re drawing—so don’t worry; this isn’t a sign of trouble! It shouldn’t flash for any other reason.

Do A3 pods have magnetic connections?

Yes! The A3 pods compatible with this device will be held in place magnetically once you pop them in, ensuring that they don’t come loose when the device is being stored or carried with a pod inside.

Is the Caliburn A3S leakproof?

The A3S is designed with numerous features to prevent e-liquid from leaking out. These include:

  • Magnetic connectors to hold the pods in place
  • A top-fill system for the A3 pods
  • No risk of accidental firing (due to the lack of a firing button)

Please note that leaks can still occur if you draw too hard on the device’s mouthpiece, or if you use an e-liquid unsuitable for your device and vaping style. Stick to 50/50 or PG-heavy nic salt e-liquids if you’re MTL vaping, and only use freebase e-juice for DTL sessions.

What is the difference between the 0.8Ω and 1.0Ω pods for the Caliburn A3S?

We recommend using the pod with a 0.8Ω preinstalled coil for tight MTL draws and the pod with a 1.0Ω coil to enjoy fuller flavours during DTL sessions.

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