Uwell Caliburn G4 Open Pod Kit Review

The Uwell Caliburn G4 Open Pod Kit is the newest addition to Uwell’s highly popular Caliburn series. It is known for its simple design, ease of use, and impressive flavor. Uwell continues to improve with each version, and the G4 is no exception. It features a sleek design, a new color screen, dual firing modes, better airflow control, and PRO-FOCS 4.0 flavor technology. All of this comes in a compact, pocket-friendly device. The Caliburn G4 is great for both new and experienced vapers. It offers rich flavor, long battery life, and a customizable draw, making it a reliable choice for everyday vaping without being complicated.

What’s Inside the Box?

• Caliburn G4 Device
• 0.4 Ω Caliburn GPP Integrated Coil Pod
• 0.9 Ω Caliburn GPP Integrated Coil Pod
• User Manual

Design & Build Quality

Uwell redesigned the G4 with a lightweight aluminum body finished in a high-quality paint that resists fingerprints. It weighs about 54–55g and measures approximately 112 × 26 × 16 mm, making it easy to carry in your pocket. The device features a smooth, modern design with textured ridges for a better grip. It also features a transparent pod that allows you to check the remaining e-liquid without removing the pod.

Sharp and Colorful Display with Animated Themes

The screen is sharp and colorful, displaying important information such as battery life, puff count, mode, and wattage. Uwell adds fun with animated themes and adjustable brightness for day or night use. Just below the screen is a flush power button that is both useful and discreet.

Pods & Coils

The G4 works with Uwell’s Caliburn GPP pods but remains compatible with earlier G3 pods, making it an excellent choice for vapers who already have previous pods. Pods hold up to 2 mL of e-juice (to meet TPD regulations) or 3 mL in international markets. Filling is easy: the side-fill design lets you top up without removing the pod. The improved pod design, paired with U² leak-proof technology and ultrasonic welding, gives confidence against messy leaks.

In the box, Uwell includes a 0.4 Ω mesh pod (for RDL) and a 0.9 Ω pod (for MTL). These pods use Uwell’s PRO FOCS 4.0 flavor system, which delivers a bolder, cleaner, and more nuanced taste. Uwell claims it boosts flavor by up to 35% and extends pod life.

Personalized Control – Airflow, Power & Modes

One of the G4’s key upgrades is personalized control:

• Adjustable airflow: A small side slider, combined with the ability to rotate the pod, delivers a four-stage draw from tight MTL to loose RDL.
• Dual firing methods: Select between auto-draw when inhaling or manual button activation.
• Wattage output: The internal system supports up to 35W. You can adjust the wattage by triple-clicking the power button.
• Two power modes:
  1. Storm Mode delivers fast, high-powered hits.
  2. Waves Mode gives smoother, more gradual puffs.

Some users feel that the difference between the modes isn’t very noticeable. However, each mode provides a unique experience regarding flavor strength and smoothness.

Battery & Charging

The Caliburn G4 comes with a 1300mAh battery, which is about 35 % larger than the older G3’s 900mAh battery. For moderate users, the battery usually lasts a full day, but heavy users might need to charge it in the afternoon. Charging is fast and easy with USB-C at 5V/2A, typically taking about an hour to fully recharge. The LED screen displays the battery level, making it easy to check before adjusting the flavor or airflow.

Comparison With Other G Series Devices

Compared to the smaller G4 Mini, the full-size G4 adds a color screen, button fire option, wattage control, and slightly larger battery, but loses a bit of compactness. Compared to the Caliburn G3, the G4 features a 35% larger battery, 35% improved flavor technology, and full Pod compatibility—all without altering how you hold or refill the device.

Pros & Cons

Pros

• Excellent flavor from PRO‑FOCS 4.0 technology.
• Versatile with pod compatibility (GPP and G3).
• Adjustable airflow options for MTL or RDL vaping styles.
• Strong battery life for most users.
• Fast USB-C charging.
• Bright and informative HD screen.
• Durable, pocket-friendly design.

Cons

• Wattage and mode changes are not locked and can be changed accidentally
• The screen can show smudges easily.
• Pods (though long-lasting) must be swapped entirely, no coil-only option

Who It’s For

The Caliburn G4 is a well-rounded pod kit that suits a wide range of vapers. New users seeking a simple and customizable option will find it a great choice. Vapers who focus on flavor will enjoy the advanced PRO FOCS technology. Those who value portability will appreciate the compact design. G3 users can upgrade while keeping their existing pods. Additionally, users who like options will benefit from dual firing modes and adjustable airflow, enhancing their vaping experience.

Various Color Options of Uwell Caliburn G4 Pod Kit

The Caliburn G4 is available in eight beautiful colors: Gunmetal Grey, Glacier Blue, Karst Grey, Polar Black, Sahara Gold, Seashell White, Flamingo Red, and Twilight Silver.

Conclusion

The Uwell Caliburn G4 Open Pod Kit skillfully combines flavor, customization, and portability. With excellent PRO‑FOCS 4.0 taste, airflow options, and a sharp screen, it feels like a modern pod system without being overwhelming. The Uwell Caliburn G4 Open Pod Kit combines great flavor, customization, and portability. With its impressive PRO FOCS 4.0 taste, adjustable airflow, and clear screen, it feels like a modern pod system without being too complicated. The G4 is a great pod kit for 2025, balancing simplicity with control.