Uwell Caliburn G3, G4 & G5 GPP Replacement Pods

The Uwell Caliburn G3, G4 & G5 GPP Replacement Pods are the official refill pods for Uwell's most popular Caliburn G-series devices. If you already own a Caliburn G3, G4 or G5 kit, these are the pods you'll be reaching for once your current one wears out or runs low, not a new device, just the part that holds the coil and the e-liquid.

What the GPP Pod System Actually Is

Uwell built the G3, G4 and G5 around a shared pod platform, which is why one pod design fits all three devices. That's a genuinely useful bit of engineering: you don't need to track which pod goes with which kit, and if you own more than one Caliburn G device, you can buy pods in bulk and use them interchangeably.

Each pod is a self-contained unit, the coil is built into the pod itself, so there's no separate coil-swapping step like you'd get with an open vape tank. When the flavour starts to fade or the pod develops a burnt taste, you replace the whole thing rather than hunting for a matching coil head.

The coils inside use mesh construction, which Uwell has favoured across the Caliburn range because it tends to heat more evenly than older round-wire coils. In practice that usually means cleaner flavour and a slightly steadier vape from start to finish, though how long any individual pod lasts still comes down to how much you vape and what you're vaping.

Who These Pods Suit

These are aimed squarely at existing Caliburn G3, G4 and G5 owners, people who've already chosen the device and just need to keep it running. That said, the broader Caliburn GPP format tends to suit a specific type of vaper:

• Smokers who've switched to vaping and want something as simple as a disposable, but refillable and cheaper to run over time
• Anyone who prefers mouth-to-lung vaping, a tighter, cigarette-like draw rather than the airy pull of a sub-ohm tank
• People who'd rather not deal with separate coils, wicking, or building, the pod handles that job on its own
• Vapers who like nic salt e-liquids, which pair naturally with this style of low-wattage pod device

If you're after big clouds or direct-lung vaping, a Caliburn G-series pod isn't really the right tool for that, it's built for restricted, MTL-style vaping, and that's where it performs best.

How to Use Them and Get the Best Results

Filling the pod

Each pod has a fill port sealed with a small silicone bung. Open it, fill slowly with your chosen e-liquid, and push the bung firmly back into place before you vape. Filling slowly matters more than people expect, pour too fast and you risk air pockets or e-liquid flooding into the airflow, which leads to gurgling and leaking later on.

Priming before first use

Once filled, give the pod a few minutes so the e-liquid can soak fully into the coil before firing it. Vaping on a dry coil, even briefly, is the single most common reason a brand-new pod tastes burnt straight out of the packet, and once that happens, it rarely recovers.

Fitting the pod into the device

The pod clicks into the top of the Caliburn G3, G4 or G5 body magnetically. There's no threading or twisting involved, line it up and press down until it seats properly. If it feels loose or falls out easily, double-check it's the right way round and fully pushed in before assuming there's a fault.

Everyday use

Keep an eye on the liquid level through the pod's viewing window and don't let it run dry, firing an empty or near-empty pod is another quick way to burn the coil out early. A gentle, steady puff also serves these coils better than short, hard drags, which can pull liquid through faster than the wick can keep up with.

Nicotine Strength Guidance

Because these pods are built for MTL vaping at low wattage, they work best with e-liquids designed for that style, typically nic salts, though freebase liquids in lower strengths will also work fine. In the UK, nicotine-containing e-liquid is legally capped at 20mg/ml (2%), and that's the ceiling regardless of brand or strength.

Roughly speaking:

• 20mg/ml nic salts suit heavier smokers switching over, or anyone who wants a strong hit from a small amount of vapour
• 10, 12mg/ml is a common middle ground for regular, moderate smokers
• 3, 6mg/ml tends to suit lighter smokers or those already reducing their intake
• 0mg e-liquids contain no nicotine at all and suit vapers who've stopped needing it, or who simply prefer vaping without it

If you're new to switching from smoking, it's usually easier to start slightly higher than you think you need and step down over time, rather than starting too low and finding the device unsatisfying. All nicotine e-liquids and vaping products are strictly for adults aged 18 and over.

How This Compares to Other Options

Compared with a disposable vape, the Caliburn G3, G4 and G5 pod system costs more upfront in device terms but works out cheaper to run over time, you're buying e-liquid and pods rather than an entire fresh disposable device every few days. It's also less wasteful, since only the pod gets replaced rather than a full battery and tank each time.

Compared with an open sub-ohm tank, this is a simpler, lower-maintenance setup. There's no separate coil to unscrew and swap, no airflow rings to fine-tune for cloud production, and no juggling different coil resistances, the trade-off is that you're also not getting the big vapour or direct-lung hit a sub-ohm setup is built for.

Against other closed-pod systems on the market, the GPP format's main advantage is cross-compatibility across three separate devices. Many rival pod systems tie you to one specific kit, so upgrading to a different model in another brand's range often makes your old pods redundant. Staying within the Caliburn G3, G4 and G5 line means your pod stock stays useful even if you switch between those three devices.

Care, Storage and Pod Lifespan

A few habits go a long way toward getting the most out of each pod:

• Store spare pods upright, away from direct sunlight and heat, ideally still sealed until you actually need them
• Wipe the pod's contact points and the device's magnetic connector occasionally, a build-up of e-liquid residue there is a common cause of connection issues or dulled flavour
• Don't overfill, stop at the fill line or just below the top of the fill port to leave room and reduce the risk of leaking
• If you vape heavily, rotating between two pods and letting each rest between fills is something many vapers find helps the coil last a little longer
• Once a pod tastes burnt, muted, or starts leaking persistently, it's genuinely time to replace it, adding more e-liquid to a dying coil rarely fixes anything for long

How many refills you get from a single pod varies a lot depending on nicotine strength, e-liquid thickness, wattage, and how often you vape, so there's no fixed number to promise here, treat each pod as a consumable and keep a couple of spares on hand so you're never caught out.

Frequently Asked Questions

Will these pods fit my Caliburn G2 or Koko Prime?

These are specifically listed as compatible with the Caliburn G3, G4 and G5. Always check pod compatibility against your exact device model before buying, since Uwell has used more than one pod format across its wider Caliburn range.

Why does my new pod taste burnt already?

This is almost always down to not priming the pod, vaping before the coil has fully soaked in e-liquid. Once a coil has been fired dry, the burnt taste usually doesn't disappear, so the pod will need replacing rather than rescuing.

Can I use any e-liquid in these pods?

Yes, though they're optimised for MTL vaping, so nic salts and standard freebase e-liquids at typical UK strengths (up to 20mg/ml) work well. Very high-VG liquids designed for sub-ohm tanks may not wick as efficiently in this style of pod.

How do I know when a pod needs replacing rather than just refilling?

If flavour has dropped off noticeably, vapour production has weakened, or you're getting a burnt or muted taste even with fresh e-liquid, that's the coil telling you it's done. Refilling won't fix a worn-out coil, only a new pod will.

Is a little condensation in the airflow normal?

A small amount of moisture is normal, especially with higher-VG liquids. Persistent leaking, gurgling, or liquid pooling in the airflow usually points to overfilling, an incorrectly seated fill bung, or a pod that's simply reaching the end of its life.