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If you own a Uwell Caliburn G3 or G4, you already know the brand makes some of the most consistent, flavour-forward pod kits on the market. But with multiple pod versions floating around — and new devices dropping regularly — it's easy to end up buying the wrong replacement pods.

This guide breaks down exactly which pods fit which device, how the G3 and G4 pods differ, and which picks are worth your money in South Africa right now.

What Is the Uwell Caliburn GPP System?

Before diving into compatibility, it helps to understand what "GPP" means. GPP stands for Gravity Push Pod — Uwell's proprietary top-fill mechanism that uses a push-to-release fill port. It's faster and less messy than traditional side-fill systems, and it's the core feature shared across the G3 and G4 pod ecosystem.

Both the Caliburn G3 and G4 use the GPP pod platform, which means there's some crossover — but not complete compatibility. The differences come down to pod capacity, coil options, and airflow design.

Uwell Caliburn G3 Pods: What You Need to Know

The Caliburn G3 was a significant step up from the G2, introducing a larger pod capacity and a more refined airflow system aimed at MTL (mouth-to-lung) vapers who want a tighter, more cigarette-like draw.

Key specs for G3 pods:

• Capacity: 2.5ml
• Fill system: Top-fill GPP
• Compatible coils: 0.9Ω and 1.2Ω UN2 meshed coils (built-in)
• Airflow: Restricted MTL
• Best for: Nicotine salt e-liquids (20mg–50mg)

The G3 pod is a closed coil system, meaning the coil is integrated into the pod itself — you replace the whole unit rather than just swapping a coil head. This keeps things simple and leak-resistant but means your running cost is tied to pod price rather than coil price alone.

Who the G3 pod suits: If you're using nic salts and want a smooth, tight draw with minimal vapour production, the G3 pod delivers exactly that. The 0.9Ω version gives slightly more warmth and vapour; the 1.2Ω is cleaner and cooler — ideal for all-day salt vaping.

Uwell Caliburn G4 Pods: What's New and Different?

The Caliburn G4 builds on the G3 platform with a few notable upgrades, particularly around pod capacity and coil versatility. It's positioned as a slightly more flexible option for vapers who want to run both salt and freebase e-liquids.

Key specs for G4 pods:

• Capacity: 3ml
• Fill system: Top-fill GPP
• Compatible coils: 0.8Ω and 1.2Ω (built-in)
• Airflow: Adjustable — restricted MTL to loose MTL
• Best for: Nic salts and lower-strength freebase liquids

The G4's 3ml capacity is a meaningful upgrade over the G3's 2.5ml — you'll refill less often, which matters when you're vaping regularly throughout the day. The adjustable airflow also gives the G4 more versatility across vaping styles, making it a better choice if you switch between salt and freebase liquids.

G3 vs G4 Pods: Direct Compatibility Breakdown

This is the question most people get wrong at the checkout stage.

The short answer: G3 pods only fit G3 devices, and G4 pods only fit G4 devices. Despite sharing the GPP fill system, the pod housing dimensions differ enough that cross-compatibility is not possible. If you're unsure which device you own, check the branding on the side of the device or the original box.

Which Resistance Pod Should You Choose?

Once you know which pod fits your device, the next decision is resistance — and it matters more than most people realise.

0.8Ω (G4) or 0.9Ω (G3) — The Warmer, Bolder Option

These lower-resistance pods run at a slightly higher wattage range, which means:

• Warmer vapour temperature
• Slightly more vapour production
• Stronger flavour intensity
• Faster e-liquid consumption

Best paired with: 20mg–35mg nic salt e-liquids. These pods hit harder, so very high nicotine concentrations (50mg) can feel harsh at this resistance.

1.2Ω — The Smooth All-Day Option

The 1.2Ω pod is the classic MTL choice. It runs cooler, uses less e-liquid per puff, and delivers a satisfying throat hit without overwhelming intensity.

Best paired with: 35mg–50mg nic salt e-liquids. This is the resistance to go for if you're transitioning from cigarettes or prefer a gentler, more sustained nicotine delivery.

How Long Do Caliburn G3/G4 Pods Last?

Pod lifespan varies based on your e-liquid type and vaping frequency, but here's a realistic guide:

• Light vaper (under 100 puffs/day): 7–14 days per pod
• Moderate vaper (100–200 puffs/day): 4–7 days per pod
• Heavy vaper (200+ puffs/day): 2–4 days per pod

Signs your pod needs replacing: burnt or muted flavour, visible discolouration of the cotton through the pod window, or a gurgling sound during draws. Don't wait until flavour is completely gone — a slightly degraded pod also affects battery efficiency.

Tip: Running sweeter e-liquids (high sucralose content) will shorten pod life noticeably. If you're getting fewer than 3 days per pod consistently, try a less sweet juice formulation.

Best E-Liquids to Run in Caliburn G3 and G4 Pods

The GPP pod system is optimised for salt nicotine e-liquids, though the G4's 0.8Ω pod handles lighter freebase liquids reasonably well. Here's what works best:

For salt nic (MTL vaping):

• High VG/PG ratio around 50/50 works well in both devices
• 20mg–50mg nicotine strength depending on your tolerance
• Thinner, runnier liquids wick faster and reduce dry hits

Avoid in these pods:

• Max VG shortfills (70VG+) — too thick for MTL pods and will cause dry hits
• Sub-ohm DTL e-liquids — the resistance and airflow aren't designed for cloud chasing

If you're building your own nic salt with a shortfill and a nicotine shot, a 50/50 VG/PG base with a VG-based nic salt shot (like AuNic Salt 15ml) is a solid starting point for these devices.

Where to Buy Caliburn G3 and G4 Replacement Pods in South Africa

Caliburn pods are widely stocked, but quality and authenticity vary between suppliers. When buying in SA, look for:

• Holographic authenticity stickers on the packaging (Uwell includes these on genuine pods)
• A scratch-and-verify code on the box that you can check on Uwell's official website
• Sealed individual pod packaging — avoid loose or repackaged pods

Counterfeit Caliburn pods are unfortunately common. Fake pods often have inconsistent flavour, poor wicking, and a noticeably shorter lifespan. Buying from a reputable local vape store ensures you're getting genuine Uwell product with the quality consistency the brand is known for.

Quick-Reference: Caliburn Pod Buying Cheat Sheet

You own a Caliburn G3? → Buy: Uwell Caliburn GPP G3 Replacement Pods → Choose 0.9Ω for bolder flavour, 1.2Ω for smooth all-day use → Best with: 20mg–50mg nic salts, 50/50 VG/PG base

You own a Caliburn G4? → Buy: Uwell Caliburn GPP G4 Replacement Pods → Choose 0.8Ω for warmer hits, 1.2Ω for cooler MTL draw → Best with: 20mg–50mg nic salts or light freebase liquids

Not sure which device you have? → Check the device text or original box. G3 and G4 are clearly labelled. If you're still unsure, bring the device into your nearest vape store — they'll identify it in seconds.

Final Verdict

The Uwell Caliburn G3 and G4 are both excellent pod systems, and their replacement pods reflect the same quality and consistency Uwell has built its reputation on. The key takeaway is simple: pods are device-specific, so always confirm your device model before purchasing.

If you're currently on a G3 and happy with it, the 1.2Ω pod is the safest daily driver. If you've upgraded to the G4 and want to get the most out of the adjustable airflow, experiment with the 0.8Ω pod at a slightly more open setting for a warmer, more flavour-forward experience.

Both devices are available in South Africa alongside their respective replacement pods — and if you're running low, it's always worth buying two or three pods at once to avoid running dry between orders.