Uwell Caliburn G3 vs G4: Which GPP Coil Device Is Worth Buying in 2026?
Uwell’s Caliburn series has been the benchmark for pod vaping since 2019, but 2026 brings a fundamental shift. The G3 and G4 no longer use separate pod ecosystems — they both run on the GPP (G Pod Platform), a unified cartridge system that works across the G3 Pro, entire G4 family, and G5 line-up. So the real question is not which pods fit, but which device delivers the better experience for your money. The G3 offers a 900mAh battery, 25W output, and a monochrome OLED at roughly R460. The G4 jumps to 1300mAh, 35W, a colour HD screen, and dual airflow control at roughly R475–R500. For South African vapers dealing with load shedding and rising device prices, that R40 difference could be the smartest upgrade you make this year — or an unnecessary spend if the G3 already covers your needs. Here is the side-by-side breakdown.
The GPP Platform: What Changed in 2026
Uwell has abandoned the old model of generation-locked pods. The G Pod Platform — GPP for short — is a single cartridge format that fits the G3 Pro, every G4 variant, and the entire G5 family. The original G3 pods have been discontinued and replaced by GPP cartridges, which come in four resistances from 0.4Ω to 1.2Ω with integrated mesh coils.
For South African vapers, this is excellent news. It means pod availability is no longer tied to which generation of device you own. Buy a pack of GPP pods today and they will fit a G3 Pro, a G4, a G4 Mini, or a G5 Lite. The newer GPP ALPHA variant uses Uwell’s AlphaCore mesh coil for longer flavour life and top-fills through a soft-touch mouthpiece, but both standard and ALPHA pods share the same magnetic connection and cross-compatibility.
| Feature | Caliburn G3 | Caliburn G4 upgrade |
|---|---|---|
| Battery | 900mAh | 1300mAh |
| Max Output | 25W | 35W |
| Screen | Monochrome OLED | 0.85" HD colour display |
| Pod Capacity | 2.5ml (top or side refill) | 2–3ml (side-fill GPP) |
| Airflow Control | Rotate pod 180° (2 settings) | Side slider + pod rotation (3+ settings) |
| Power Modes | Eco / Normal / Power | Waves / Storm + adjustable wattage |
| Charging | 2A Type-C (~40 mins) | 2A Type-C (~44–45 mins) |
| Weight | ~47g | ~55g |
| Est. Price (SA) | ~R460 | ~R475–R500 |
| Pod Compatibility | GPP & G3 pods | GPP & G3 pods |
Uwell Caliburn G3 — The Proven Workhorse
The Caliburn G3 was Uwell’s first G-series device to add an OLED screen, and it represented a major leap from the G2. The 900mAh battery was a 20% increase over the G2’s 750mAh cell, and the 2.5ml pod capacity — larger than the G4’s standard 2ml — meant fewer refills during the day.
The G3’s airflow system is simple but effective: rotate the pod 180 degrees to switch between a tighter MTL draw and a looser restricted-DTL draw. The monochrome OLED shows wattage, battery level, resistance, puff count, and firing mode. It supports both button-fire and auto-draw, and the single-button interface allows precise wattage adjustment across three trigger modes.
- Larger 2.5ml pod capacity means fewer refills than the G4’s 2ml standard
- Pro-FOCS 3.0 flavour technology delivers crisp, consistent taste
- U² anti-leak mechanism with ultrasonic welding — genuinely leak-resistant
- Now compatible with GPP pods, so you are not locked into discontinued stock
- Smaller and lighter than the G4 — genuinely pocket-friendly at 47g
Who should buy it: The G3 is for vapers who want a reliable, no-nonsense pod system with a proven track record. At roughly R460, it is slightly cheaper than the G4, and the larger 2.5ml pod capacity is a genuine advantage if you hate refilling. The 900mAh battery gets most MTL users through a full day, and 2A charging recovers 80% in about 30 minutes — fast enough for most South African power windows. If you do not need a colour screen, 35W output, or granular airflow control, the G3 is the rational choice.
Uwell Caliburn G4 — The Feature Upgrade
The Caliburn G4 is less a revolution and more a refinement of everything the G3 started. The battery jumps to 1300mAh — a 44% increase — and maximum output climbs to 35W, opening the door to proper restricted-DTL vaping with the 0.4Ω GPP pod.
The headline feature is the 0.85-inch HD colour display. It shows battery percentage, resistance, live wattage, puff count, puff timer, lock status, and current mode. Three themes are available — two animated colour options and one monochrome — plus day and night brightness modes. For vapers who find the G3’s monochrome screen cramped or dated, the G4’s display is a noticeable step up.
The G4 also introduces two new output modes. Waves mode delivers a smooth, consistent power curve. Storm mode applies a burst of power at the start of each puff for a stronger initial hit. In practice, the difference is subtle — most reviewers describe Storm as a mild boost mode — but it adds a layer of customisation the G3 cannot match.
- 1300mAh is the largest battery in the standard Caliburn stick format
- 35W output properly powers the 0.4Ω GPP pod for RDL vaping
- Side-fill GPP pods can be refilled without removing the pod from the device
- Dual airflow control — slider plus pod orientation — creates genuinely different draws
- Pro-FOCS 4.0 and U² technology extend pod lifespan and reduce coil burnout
The G4 is slightly thicker, wider, and heavier than the G3 — 55g versus 47g — and the standard pod capacity drops from 2.5ml to 2ml. The 2A charging, while fast, takes marginally longer than the G3 because the battery is larger. And despite the 1300mAh cell, real-world testing shows the G4 lasts roughly the same amount of e-liquid per charge as the G3 Pro (4.5–5ml), suggesting the colour screen and higher output draw more power than the raw battery numbers imply.
Who should buy it: The G4 is for vapers who want the most capable Caliburn stick device available. The 35W output, colour screen, and dual airflow control make it the better choice if you switch between MTL and RDL, or if you simply appreciate seeing exact battery percentage and adjusting wattage on the fly. At roughly R475–R500 in South Africa, it costs only marginally more than the G3 while delivering a noticeably more modern experience.
GPP Pods: The Real Story
Because both devices now use the GPP platform, the pod experience is identical where it counts. The GPP cartridges come in 0.4Ω, 0.6Ω, 0.9Ω, and 1.2Ω, each with an integrated mesh coil and Pro-FOCS 4.0 flavour technology. The 0.4Ω and 0.6Ω pods suit restricted-DTL and loose MTL vaping at 18–30W. The 0.9Ω and 1.2Ω pods are tighter MTL options best for 10–18W and higher-strength nicotine salts.
The standard GPP pod uses ultrasonic welding and a U-shaped airflow channel that Uwell claims improves leak resistance by 150%. In practice, reviewers report genuinely leak-free performance even when the device is stored on its side or upside down.
Pod lifespan is a Caliburn stronghold. With moderate use and standard e-liquid, GPP pods routinely last 7–14 days. Heavy sweetener users may see closer to a week, but that is still competitive against most rival pod systems where 5–7 days is typical.
| GPP Pod | Best Wattage | Draw Style | Best For |
|---|---|---|---|
| 0.4Ω | 25–35W | Restricted DTL | Low-mg freebase, cloud and flavour |
| 0.6Ω | 18–25W | Loose MTL / RDL | All-rounders, 10–20mg salts |
| 0.9Ω | 13–18W | Tight MTL | 20mg salts, cigarette-like draw |
| 1.2Ω | 10–14W | Very tight MTL | Strong throat hit, maximum efficiency |
Load Shedding and Charging Reality
For South African vapers, the difference between 900mAh and 1300mAh is not abstract — it is the difference between making it home from work and vaping in the dark. Here is how each device handles real-world power interruptions:
| Scenario | Caliburn G3 (900mAh) | Caliburn G4 (1300mAh) |
|---|---|---|
| Full charge time | ~40 mins | ~44–45 mins |
| 10-minute top-up | ~25% battery | ~22% battery |
| Days between charges (MTL) | 1 day | 1–1.5 days |
| Days between charges (RDL) | Less than 1 day | ~1 day |
| E-liquid per charge | ~4–5ml | ~4.7–5ml |
The G4’s larger battery does deliver more endurance, but the gap is narrower than the 44% capacity increase suggests. The colour screen and higher available wattage consume more power, so real-world e-liquid consumption per charge is only marginally better than the G3. Where the G4 genuinely wins is headroom: if you forget to charge overnight, the 1300mAh cell is more forgiving than the G3’s 900mAh. For vapers in areas with frequent Stage 4–6 load shedding, that buffer matters.
The Decision Framework
Choose the Caliburn G3 if:
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✓You want the lowest entry price into the GPP ecosystemAt roughly R460, the G3 is slightly cheaper than the G4 and delivers the same pod compatibility and core flavour quality. The money saved buys two extra packs of GPP pods.
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✓You prioritise pod capacity over screen featuresThe G3’s 2.5ml pods hold more e-liquid than the G4’s standard 2ml cartridges. If you commute long distances or hate carrying e-liquid bottles, that extra 0.5ml per fill adds up.
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✓You are strictly MTL and never exceed 20WThe G3 tops out at 25W, which is more than enough for 0.6Ω, 0.9Ω, and 1.2Ω pods. If you have no interest in RDL or cloud chasing, the G4’s extra 10W is wasted capability.
Choose the Caliburn G4 if:
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✓You want the most advanced Caliburn stick deviceThe colour screen, 35W output, Storm/Waves modes, and dual airflow control make the G4 the most customisable Caliburn yet. For an extra R40–R50 over the G3, the upgrade is tangible.
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✓You switch between MTL and RDL stylesThe side airflow slider combined with pod rotation gives the G4 genuinely versatile airflow. The 0.4Ω GPP pod at 30W produces a satisfying restricted-DTL draw the G3 cannot match.
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✓Battery anxiety frustrates youThe 1300mAh cell provides more headroom for heavy users and forgetful chargers. While real-world efficiency is not dramatically better, the extra capacity is a safety net the G3 lacks.
A Quick Word on the G4 Pro
If the G4’s 1300mAh is not enough, the Caliburn G4 Pro pushes the platform further with an 1800mAh battery, a 2.51-inch shatterproof touchscreen, and 2.5A fast charging that recovers a full charge noticeably quicker.
The G4 Pro is a different class of device — larger, heavier, and priced at roughly R729 in South Africa. It is not a direct competitor to the standard G3 or G4; it is for vapers who want touchscreen control and all-day-plus battery life in a single device. If you are deciding between the G3 and G4, the G4 Pro is only relevant if you have already decided the standard G4 is not enough.
What Reviewers Are Saying
Global feedback on the G3 and G4 has been consistently positive, with the same themes repeating: flavour excellence, pod longevity, and the G4’s screen as the primary differentiator.
Frequently Asked Questions
The Verdict
The Uwell Caliburn G3 and G4 are not competitors — they are two entry points into the same excellent ecosystem. The G3 remains a superb device: compact, reliable, and now future-proofed with GPP pod compatibility. The G4 is the upgrade for vapers who want more battery, more power, and a modern colour screen without stepping up to the Pro price bracket. In South Africa, where the price gap is barely R40, the G4 is the default recommendation for most buyers. But if you value the G3’s larger 2.5ml pods, lighter weight, and proven simplicity, you are not missing out on flavour or coil quality by choosing the older model. The real win for South African vapers in 2026 is the GPP platform itself — one pod format, wide availability, and no more orphaned cartridges when Uwell releases the next generation.
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