Released in 2019, the Uwell Caliburn has consistently been one of the world’s most popular refillable pod systems since it first hit the market. For many vapers around the world, the Caliburn simply has the perfect blend of portability, performance, low price and ready availability.

The one drawback of buying some Chinese-branded vaping products, though, is that they may not always include the greatest instruction manuals in the world. That’s certainly true of the Uwell Caliburn; as great as the device is, you’re not likely to get a lot of help from the instruction manual if you run into trouble.

Well, we’re here to help. You’re not going to find a Uwell Caliburn review on this page. If you’re here, you already know the Caliburn is a device that’s absolutely worth owning if you’re a fan of nic salt e-liquid. What you don’t know, though, is how to use the device to its fullest potential. That’s what we’re going to cover in this Uwell Caliburn guide.

Uwell Caliburn Specifications and Features

As we mentioned, the Uwell Caliburn is a pod system that, for many people, simply hits the sweet spot in terms of the great experience that you get relative to the small size of the device. The Caliburn is a bit larger than a device like the JUUL, but the tradeoff is that the Caliburn has more than double the battery life and more than double the pod capacity while still being incredibly easy to carry and to store just about anywhere.

Uwell Caliburn Specifications

  • Pod capacity: 2 ml
  • Battery capacity: 520 mAh
  • Power delivery: 11 watts
  • Coil resistance: 1.4 ohm
  • Charging time: About 45 minutes via micro USB port
  • Draw-activated or manual puffs
  • 5-click lock/unlock function
  • Magnetic drop-in pods
  • Indicator light shows current battery status

Why is the Uwell Caliburn So Popular?

Uwell Caliburn Manual

In addition to the winning combination of price, size and performance, the main claim to fame of the Uwell Caliburn is that it was the first pod system to use a true tank-class coil with a cotton wick as opposed to the smaller coils with silica wicks that most pod systems use. Uwell has always been known as the vape manufacturer of choice for people who prioritize flavor above all else, and Uwell obviously wanted to bring that same mindset to the Caliburn. When it became obvious that pod systems were the future of the vaping industry, most of the vaping product manufacturers in China rushed to bring pod-based devices to the market as quickly as possible. Uwell delayed the release of their pod system until they felt that the flavor was just right, and the payoff for taking a little extra time has been worldwide acclaim.

Is There a Uwell Caliburn Pod Shortage?

One of the things you may have noticed if you’re a Uwell Caliburn owner is that the pods have become very difficult to find in the United States. You may have even seen rumblings of a potential Uwell Caliburn pod shortage on Reddit discussion groups. There are two causes for the short supply of Caliburn pods in the US.

  • The COVID-19 pandemic entered its first major peak during the Chinese New Year celebration, when many Shenzhen factory workers were at home. The ensuing travel restrictions made it impossible for many people to return to work, creating a shortage of many vaping products.
  • On April 27, the FDA sent a warning letter to Uwell demanding that the company stop selling the Caliburn in the US. Since the Caliburn came out after 2016, it is technically illegal to sell in the US without FDA approval. While it’s possible that some Chinese wholesalers are still shipping Caliburn pods to the US, Uwell isn’t. That may make the pods difficult to find.

How to Charge the Uwell Caliburn

Uwell Caliburn Problems

To charge the Uwell Caliburn, simply connect it to your computer’s USB port using the charging cable included in the box. Watch the indicator light on the device to know when it’s done charging. To get the best possible longevity from the Caliburn’s battery, you should charge the device fully before using it for the first time.

As you use the Caliburn, the device’s indicator light changes color to indicate the current status of the battery.

  • A green indicator means that the remaining battery charge is over 60 percent.
  • A blue indicator means that the remaining battery charge is 30-60 percent.
  • A red indicator means that the remaining battery charge is under 30 percent.

How to Fill the Uwell Caliburn Pod

To fill the Uwell Caliburn pod, start by removing the pod from the top of the device. Wiggle the black mouthpiece gently until it detaches from the pod. With a new pod, you may find the mouthpiece a little difficult to remove; it’ll get easier with time.

When you remove the pod’s mouthpiece, you’ll see two filling holes alongside the pod’s center air tube. Position the nozzle of your e-liquid bottle over either filling hole and add e-liquid until the pod is almost full. Leave a little room for air at the top; if you overfill the pod, it may gurgle or leak. Replace the pod’s mouthpiece.

One of the most unpleasant things that you can experience when vaping is a harsh burned taste, and the most common reason for a burned taste with the Uwell Caliburn is vaping too soon after filling the pod for the first time. The Caliburn pod has a cotton wick, and the wick can burn if you attempt to vape before the wick is completely wet. If that happens, you’ll never get a good flavor from that pod because there’s no fix for a burned wick. After you fill a new pod for the first time, wait at least five minutes before vaping.

How to Use the Uwell Caliburn

Uwell Caliburn How to Use

One of the fun things about the Uwell Caliburn is that it allows you to vape the way you want. It’ll generate vapor automatically when you puff on it, or you can hold the fire button to vape. Some people prefer the more cigarette-like experience of a draw-activated mechanism. Draw-based activation introduces a slight delay, though, so you’ll get bigger vapor clouds if you use the fire button.

If nothing happens when you try to use the Caliburn, the device is probably locked. Press the button five times quickly to unlock the device.

How to Fix Uwell Caliburn Problems

Caliburn Pods Burning Out Quickly

If you’re not getting the expected life out of your Caliburn pods, there are three likely causes.

  • As mentioned above, you’re not waiting long enough for the wick to saturate when filling a new pod for the first time.
  • You’re vaping at too quick a pace and are not giving the wick enough time to re-saturate itself between puffs. This dramatically shortens the lifespan of the cotton.
  • You’re using a heavily sweetened e-liquid, which causes coil gunk. Coil gunk – caused by sucralose residue – creates a strong caramelized sugar flavor that eventually leads to every puff tasting burned. If you use an e-liquid with less sweetener or no sweetener, your pods will last much longer.

Caliburn Not Hitting

Is your Uwell Caliburn not hitting? You press the fire button, and nothing seems to happen? Try these three fixes.

  • Press the fire button five times quickly. The most likely reason why your Caliburn isn’t hitting is because the device is locked.
  • Charge the battery fully. The device won’t produce vapor if the battery is dead.
  • Confirm that the pod has a good electrical connection with the device. Clean the contacts at the top of the Caliburn with a cotton swab. If the bottom of the pod is contaminated with dust and old e-liquid, clean it as well.

Caliburn Not Charging

If your Uwell Caliburn isn’t charging, start by trying a different micro USB cable. Since micro USB is a common charging standard, you most likely have a few spare cables lying around – and cables that are used daily tend to wear out quickly. If that doesn’t work, try charging your device with a different USB port or different computer. Don’t attempt to use a mobile phone or tablet charger, which can potentially cause an e-cigarette battery to overheat.

Caliburn Spitting or Gurgling

If your Uwell Caliburn is spitting or gurgling, it means that e-liquid is caught in the air channel leading from the atomizer coil to the mouthpiece – and the most likely reason is that you’re puffing too firmly when you vape. If you draw too much air through the device when inhaling, you’ll force more e-liquid into the Caliburn’s atomizer coil than the wick can hold. Eventually, the e-liquid works its way into the pod’s air tube and potentially even into your mouth. If you inhale gently when vaping, that shouldn’t happen.

Are you experiencing a stubborn gurgling issue? Continue vaping until the pod is empty, and you’re ready to refill it. Remove the pod from the Caliburn. Place the pod in a paper towel and blow hard through the pod’s mouthpiece. That should clear the e-liquid out of the air tube.

Caliburn Leaking

One of the great things about the Uwell Caliburn is that, since you fill the pod from the top, it’s very difficult for the pod to leak as long as you hold it upright. Leaks do sometimes happen, though, and we’ve already covered the two most common causes: overfilling the pod and inhaling too firmly when vaping. Either of those will draw excess e-liquid into the pod’s atomizer coil assembly, and if that happens, the e-liquid may ultimately leak out of the pod’s air intake holes.