OXVA XLIM 3 Ultra vs Uwell Caliburn G4 Pro: Which Pod System Is Better?

This guide breaks down the real differences between them — battery life, screen quality, pod compatibility, flavour technology, and independent testing results — and adds something a specification sheet cannot: OVSEG's own long-term experience using both devices. We also cover current pricing and availability in Egypt.

Quick Verdict: Which One Is Right for You?

Check current prices on OVSEG for the XLIM 3 Ultra and Caliburn G4 Pro to see which fits your budget right now.

Meet the Contenders

Head-to-Head Comparison

Manufacturer battery-life and charging claims are OXVA's and Uwell's own figures and are not independently verified in every case.

Battery Life: Caliburn G4 Pro Has the Larger Battery

The most important specification difference for many vapers is battery capacity.

The XLIM 3 Ultra runs a 1500mAh battery. According to OXVA, it typically lasts up to 4 days of use depending on vaping habits, and reaches 80% charge in approximately 30 minutes.

The Caliburn G4 Pro packs an 1800mAh battery — 20% larger. Uwell positions this as the largest battery in the Caliburn series.

Charging specifications differ: the XLIM 3 Ultra uses USB-C at 5V/2A, while the Caliburn G4 Pro supports USB-C at 2.5A. The practical difference depends on how the devices manage charging curves, but the Caliburn G4 Pro's higher current rating may translate to faster top-ups in real-world use.

It is worth noting that independent testing by Vaping360 found the XLIM 3 Ultra's runtime in its review sample to be less impressive than the rated 1500mAh figure might suggest — a point covered in more detail in the independent testing section below.

Winner: Caliburn G4 Pro — the larger rated capacity is verified on paper.

Touchscreen and Interface: Two Different Approaches

Both devices feature full-colour touchscreens, but they serve different purposes.

The XLIM 3 Ultra uses a 2.2-inch HD full-touch screen with what OXVA calls a "simple and intuitive ULTRA UI." The interface focuses on essential one-button functions and a clean layout, aiming to eliminate unnecessary complexity.

The Caliburn G4 Pro uses a slightly larger 2.51-inch shatterproof touchscreen with a much richer feature set: 6 customisable themes, 8 interface languages, and the ability to rename the device. The UI includes gesture navigation and a tutorial on first boot.

During Planet of the Vapes' hands-on review, the reviewer described the Caliburn G4 Pro's touch capability as "nicely responsive" and noted that Uwell includes an on-device tutorial to help users learn the gestures. The same reviewer observed that the screen "attracts fingerprints," a common trade-off with glossy touch displays.

Vaping360's review of the XLIM 3 Ultra described the device as offering a "more advanced menu" compared to the XLIM PRO 3, with the large touchscreen providing "smartphone-level clarity and responsiveness."

Winner: Caliburn G4 Pro — larger screen with more customisation options. The XLIM 3 Ultra's interface is simpler, which some users may prefer.

Flavour and Coil Technology: Super Pulse vs Pro-FOCS 4.0

Both devices approach flavour delivery differently.

The XLIM 3 Ultra uses OXVA's Super Pulse System alongside UniTech 2.0. OXVA states the Super Pulse System maintains stable output and consistent flavour even as battery level drops — the company claims rich, smooth puffs down to 1% battery. These are manufacturer claims, not independently verified across all conditions.

The Caliburn G4 Pro uses Uwell's Pro-FOCS 4.0 flavour technology. Uwell states this supports consistent flavour performance across compatible cartridges. Again, this is a manufacturer claim.

What independent testing shows: Planet of the Vapes reviewed the Caliburn G4 Pro and reported that "flavour again is excellent, the GPP pods have really nailed it for Uwell here, and the vapour production is also still very good." The reviewer also described the draw activation as spot-on and consistent even with lighter puffs. This independent observation carries weight and should not be dismissed.

For the XLIM 3 Ultra, Vaping360's review focused heavily on build quality and interface, describing both the XLIM PRO 3 and XLIM 3 Ultra as "among the most impressive pod vapes I've used this year" with "expertly crafted" construction. The review did not highlight any flavour weaknesses.

Pod Compatibility and Ecosystem

This is where the two devices diverge significantly.

The XLIM 3 Ultra is compatible with the entire XLIM pod series, including V2 and V3 top-fill cartridges. OXVA's official page states "XLIM Pod All Compatible." This means anyone with existing XLIM pods can use them with the XLIM 3 Ultra. XLIM replacement cartridges are available from OVSEG in 0.4Ω, 0.6Ω, 0.8Ω, and 1.2Ω options.

The Caliburn G4 Pro uses Caliburn GPP cartridges and is also cross-compatible with Caliburn G3 cartridges. This gives it access to two pod generations. Uwell Caliburn GPP Replacement Pods are available from OVSEG in multiple resistances.

Both platforms offer multiple resistance options, and independent reviewers have reported strong GPP flavour and performance. On paper, this looks like a tie — but after extended use, our preference leans toward the XLIM 3 Ultra. The main reason is cartridge reliability: XLIM cartridges have felt more dependable and consistent to us over time. This is our first-hand experience and not an objective universal result. Independent reviewers have reported good performance from GPP cartridges, and the GPP platform remains capable.

Condensation and Daily Maintenance

Small amounts of condensation beneath refillable pod cartridges can occur during normal use. This is not the same as a full e-liquid leak — it is the light moisture that sometimes accumulates around the pod connection after regular vaping and refilling.

In our extended use of both devices, we noticed that the XLIM 3 Ultra has generally left fewer light droplets beneath the cartridge than the Caliburn G4 Pro. This has made routine cleaning slightly simpler for us in day-to-day use.

To be clear: this is our practical observation from the units we used. It should not be interpreted as a guarantee that every XLIM cartridge will behave the same way, or that every Caliburn GPP cartridge will produce more condensation. Both devices can develop small amounts of condensation during normal use.

Our Long-Term Experience With Both Devices

We have used both the OXVA XLIM 3 Ultra and the Uwell Caliburn G4 Pro extensively rather than comparing specifications on paper alone. This section reflects our own hands-on impressions over a long period of everyday use.

Our overall preference after long-term use: OXVA XLIM 3 Ultra.

The biggest reason is cartridge reliability. In our experience, XLIM cartridges have been more consistently dependable in everyday use. The established XLIM cartridge ecosystem is one of the practical strengths that has helped OXVA remain a competitive name in the pod-system market — though any broader market interpretation should be read as our editorial analysis rather than an independently verified market-share fact.

Second, the XLIM 3 Ultra feels punchier to us during actual use. This is a subjective impression, not a wattage measurement. The Caliburn G4 Pro is officially rated up to 35W, while the XLIM 3 Ultra is rated up to 30W — but to us, the XLIM 3 Ultra consistently delivers a stronger-feeling hit. We are not claiming the XLIM is objectively more powerful; we are reporting how the two devices feel in our hands over time.

Third, we have observed less light condensation collecting beneath the XLIM cartridge compared with the Caliburn G4 Pro during long-term use. This is a small but practical difference in day-to-day maintenance. Both devices may develop small amounts of condensation around the pod connection during normal use, and our observation applies to the specific units and cartridges we used — not a guarantee for every unit or user.

None of these observations are laboratory findings. They are our honest impressions after living with both devices for a meaningful period, and they are offered alongside — not instead of — the verified specifications and independent reviewer findings covered elsewhere in this article.

What Independent Testing Tells Us

Specifications only tell part of the story. Here is what reputable independent reviewers found in hands-on testing.

OXVA XLIM 3 Ultra — Vaping360 Review

Vaping360 reviewed the XLIM 3 Ultra alongside the XLIM PRO 3. Their key findings:

• Build quality: "When it comes to build quality, the XLIM PRO 3 and XLIM 3 ULTRA do not disappoint. They're among the most impressive pod vapes I've used this year."
• Design: "Both are expertly crafted, have beautiful screens, and the airflow sliders and buttons have excellent tension."
• Interface: The XLIM 3 Ultra is described as "essentially the PRO 3, repackaged with a more classic design and a more advanced interface," with the 2.2-inch HD touchscreen being the standout feature.
• Performance: The reviewer noted the device maintains stable output, consistent with OXVA's Super Pulse claims.

Battery testing: Vaping360's battery testing was less impressive than the headline 1500mAh specification might suggest. In its review sample, the reviewer measured around 1130mAh during charging and reported roughly 5ml of e-liquid use per charge. Charging took approximately 55–67 minutes in the review testing. These figures reflect Vaping360's specific test units and methodology rather than the XLIM 3 Ultra's official battery specification, which remains 1500mAh, and results can vary between users and conditions. The reviewer described the runtime as lower than expected for a device advertised with a 1500mAh battery.

Uwell Caliburn G4 Pro — Planet of the Vapes Review

Planet of the Vapes reviewed the Caliburn G4 Pro and provided detailed hands-on observations:

• Build: "Solid and, dare I say it, premium build." The reviewer noted the screen insert "takes up most of the front of the device" and the touch capability is "nicely responsive."
• Flavour: "Flavour again is excellent, the GPP pods have really nailed it for Uwell here, and the vapour production is also still very good."
• Draw: The auto-draw "triggered consistently, even with lighter puffs."
• Screen: The reviewer observed that the screen "attracts fingerprints" — a practical consideration for glossy touch displays.
• Battery: The 1800mAh battery is described as the largest in the series, with charging via USB-C.

Keeping the Evidence Types Separate

To be clear about how to read this article:

• Manufacturer claims (from OXVA or Uwell) are identified as such and are not treated as independently verified.
• Independent reviewer findings (Vaping360, Planet of the Vapes) reflect those reviewers' own test units and conditions.
• OVSEG long-term experience is our own first-hand use of both devices — subjective, practical, and offered as editorial context rather than controlled testing.

Where XLIM 3 Ultra Has the Advantage

• Cartridge reliability in our long-term use: XLIM cartridges have felt more consistently dependable to us across extended everyday use.
• Punchier-feeling delivery in our experience: Subjective, not wattage-based — we found the XLIM 3 Ultra feels stronger in real use despite the G4 Pro's higher 35W rating.
• Less light condensation in our experience: We noticed fewer light droplets beneath the cartridge than with the G4 Pro in our long-term use.
• Super Pulse System: OXVA states this maintains stable output and consistent flavour down to low battery levels (manufacturer claim).
• Premium build: Zinc alloy construction gives a more substantial, metal-forward feel. Vaping360 described build quality as "among the most impressive."
• Simpler interface: The ULTRA UI focuses on essential functions, which some users prefer over the Caliburn's more feature-dense interface.
• Established XLIM pod ecosystem: Compatible with the entire XLIM pod series including V2 and V3, with XLIM replacement cartridges available from OVSEG.
• Broad resistance range: 0.4Ω to 1.2Ω gives flexibility for different vaping styles.

Where Caliburn G4 Pro Has the Advantage

• Larger battery: Verified 1800mAh versus 1500mAh.
• Higher maximum output: Verified 35W versus 30W.
• Larger touchscreen: 2.51 inches versus 2.2 inches, with more customisation options.
• Three output modes: Storm, Waves, and Custom give more flexibility in how power is delivered.
• UI customisation: 6 themes, 8 languages, and a renameable device — a level of personalisation the XLIM 3 Ultra does not match.
• Cross-compatible pods: Works with both Caliburn GPP and G3 cartridges, with Uwell Caliburn GPP Replacement Pods available from OVSEG.
• Lighter: Approximately 78g versus the XLIM 3 Ultra's 90g.

Pros & Cons

Frequently Asked Questions

This comparison combines official OXVA and Uwell specifications, published independent reviews, current OVSEG product information, and OVSEG's own long-term use of both devices. Our observations about cartridge reliability, perceived hit strength, and condensation are based on real-world use rather than controlled laboratory testing. Manufacturer claims are identified as such, and independent reviewer results reflect their individual test conditions.