OVERVIEW: Uwell Caliburn G4 Pro

Review Kris Lord Rico
Eight different colored Caliburn vape devices lined up against a blue background.

Features, Performance, and Compatibility of the Caliburn G4 Pro

The Uwell Caliburn G4 Pro pod system marks the next evolution in the beloved Caliburn series — known for its smooth draw, superior flavor, and sleek design. But is the Caliburn G4 Pro worth it in 2024?

This review dives deep into its flavor performance, battery life, coil quality, and everyday usability to help you decide if this MTL pod system deserves a spot in your vape collection.

 

 

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Design & Build Quality

At first glance, the Caliburn G4 Pro maintains Uwell’s signature slim and minimalistic look while introducing a few smart refinements. Crafted from premium aluminum alloy, this pocket-friendly pod vape feels lightweight yet durable — ideal for vapers who are always on the go.

Key Design Details:

  • Dimensions: 110mm × 25mm × 15mm

  • Weight: Only 42g

  • Material: Aluminum alloy body (scratch- and fingerprint-resistant)

  • Colors: Black, silver, and modern gradient finishes

The magnetic pod connection locks securely, preventing accidental detachment. Combined with its leak-proof pod vapedesign, this ensures a cleaner, more reliable experience than previous Caliburns.

 

 

Vapor & Flavor Experience

In terms of flavor, the Caliburn G4 Pro delivers impressive results. The upgraded Caliburn G4 Pro coils provide a balance between flavor clarity and smooth vapor output — suitable for both mouth-to-lung (MTL) and restricted direct-lung (RDL) users.

Flavor Performance Highlights:

  • Rich flavor with high consistency

  • Minimal spitback or flooding

  • Works perfectly with nicotine salts and 50/50 VG/PG blends

Whether you’re using 0.8Ω coils for denser vapor or 1.2Ω coils for a tighter draw, the Caliburn G4 Pro flavor quality remains exceptional — easily rivaling other best pod systems of 2025 like the Vaporesso Xros or Caliburn G3.

 

 

Key Features & Performance

The Uwell Caliburn G4 Pro stands out with a host of smart and user-friendly upgrades that improve daily vaping convenience.

Advanced Features:

  • Smart chipset pod vape – Automatically adjusts power based on coil type

  • Leak-proof design – Enhanced seals prevent e-liquid mess

  • Auto-draw activation – No button needed; just inhale to vape

  • Top-fill pod system – Easy refilling with no spills

  • Adjustable airflow – Customize your draw tightness

  • Transparent 2.5ml pod – Easily monitor your e-liquid level

For vapers tired of leaky devices, the Caliburn G4 Pro’s leak-proof engineering and refillable pod system make it a dependable choice for everyday use.

 

 

Battery Life & Charging

The Caliburn G4 Pro 1000mAh battery delivers long-lasting performance that can easily last a full day of moderate to heavy vaping.

Battery Specs & Charging Performance:

  • Capacity: 1000mAh built-in battery

  • Charging: USB-C fast charging (0–80% in ~45 minutes)

  • Usage Time: All-day battery for most users

  • LED Battery Indicator: Clear light display for easy monitoring

This USB-C pod system minimizes downtime and ensures consistent power delivery — perfect for commuters or those who prefer an all-day pod system.

 

 

Coils, Pods, and E-Liquid Compatibility

Caliburn G4 Pro pods hold 2.5ml of e-liquid, ideal for extended sessions without frequent refills. The pod system supports two main coil options:

  • 0.8Ω Coil: Balanced vapor and flavor

  • 1.2Ω Coil: Tight MTL draw with longer coil life

Best Coils for Caliburn G4 Pro: Use genuine Uwell coils to ensure optimal coil lifespan (typically 1–2 weeks).

Recommended E-Liquids:

  • Nicotine salts (25–50mg)

  • Freebase nicotine (up to 6mg)

  • 50/50 or high PG blends for MTL vaping

The Caliburn G4 Pro coil life is excellent, especially when paired with quality e-liquids and proper maintenance.

 

 

Who Should Try the Caliburn G4 Pro

The Uwell G4 Pro is ideal for:

  • Beginners: Easy to use, refill, and maintain

  • Commuters: Portable and leak-resistant

  • Ex-Smokers: Delivers satisfying nicotine hits

  • Flavor Enthusiasts: Clean, consistent flavor reproduction

Avoid this model if you prefer sub-ohm cloud chasing or heavy customization — this device is built for simplicity and reliability, not power tuning.

 

 

Caliburn G4 Pro vs Competitors

Feature Caliburn G4 Pro Caliburn G3 Vaporesso Xros 4
Battery 1000mAh 900mAh 1000mAh
Pod Capacity 2.5ml 2ml 2ml
Airflow Adjustable Limited Adjustable
Coil Options 0.8Ω / 1.2Ω 0.8Ω / 1.0Ω 0.6Ω / 1.0Ω
Leak Resistance Excellent Moderate Good
Charging USB-C USB-C USB-C

Compared to the Caliburn G3, the G4 Pro upgrade introduces better airflow control, longer battery life, and improved leak prevention — making it one of the best Uwell pod systems available right now.

 

 

Frequently Asked Questions (FAQs)

With proper care, the device itself can last years. Each coil typically lasts 1–2 weeks depending on usage and e-liquid type.

Nicotine salts between 25–50mg are ideal for a smooth MTL experience.

Simply remove the mouthpiece, fill through the top-fill port, and reseal. The process is clean and spill-free.

Yes, but use lower strengths (3–6mg) to avoid harshness.

Every 1–2 weeks, or sooner if you notice flavor loss or gurgling.

Absolutely — it’s a beginner-friendly pod vape with auto-draw activation and minimal setup required.

The G4 Pro features an upgraded leak-proof design that prevents messy spills and condensation issues.

Roughly 45 minutes for 80% charge using the included USB-C cable.

 

Final Verdict

The Uwell Caliburn G4 Pro is easily one of the top-rated pod systems of 2024, offering the perfect balance between design, performance, and usability.

Strong points:

  • Excellent flavor & vapor quality

  • All-day Caliburn G4 Pro battery life

  • Easy refilling & leak-proof pod design

  • Compact and durable aluminum build

Minor drawbacks:

  • Limited customization

  • No temperature control

If you’re a beginner, commuter, or ex-smoker, the Caliburn G4 Pro is a fantastic choice.

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