REVIEW: Uwell Caliburn G4 PRO KOKO

The Uwell Caliburn G4 PRO KOKO is the newest update to the KOKO form factor, taking what people like about compact, draw-to-vape devices and making them feel more modern with a full touchscreen and a much larger internal battery. It aims to keep things friendly for beginners while offering enough control for someone who knows the difference between a warm inhale and a smoother airflow setting. This is not a tiny keychain pod that looks high-tech just for show, the customization options genuinely affect how it performs. While it still fits in even the smallest pocket, Uwell has given this version deeper functionality, better visibility of settings, and more flexible pod compatibility.

Overview

• DIMENSIONS: 85.8mm x 50mm x 23mm
• BATTERY CAPACITY: 2000mAh
• BATTERY CONFIGURATION: Integrated Rechargeable
• MAX WATTAGE: 35W
• DISPLAY SCREEN: 2" Touchscreen
• OPERATION: Draw-Activated
• CHARGING: USB Type-C
• POD CAPACITY: 3mL
• POD SUPPORT: Caliburn GPP Pods / Caliburn G3 Pods
• FILL SYSTEM: Side-Fill
• COIL INSTALLATION: Integrated, Pre-Installed
• AIRFLOW: Adjustable
• OUTPUT MODES: Storm Mode • Waves Mode • Customize Mode
• Lanyard hole

The combination of a sizeable battery, a screen, and a power ceiling up to 35 watts positions this as a higher-performance KOKO rather than a strictly budget pod device.

Up to 35 watts allows the G4 PRO KOKO to operate noticeably warmer and fuller than older KOKO versions, especially when paired with low-resistance coils. Users who prefer lighter mouth-to-lung hits can stay at the lower end of the wattage range, while those switching from mod setups can still get satisfying output without draining the battery extremely fast. It caters to different preferences without overwhelming users, because wattage adjustments are made directly on the screen in simple increments rather than hidden menus or button combinations.

The 2000mAh internal battery is one of the most substantial upgrades you’ll find on a compact square pod system. It provides dependable daily endurance, often a day or longer for moderate wattage usage. Rather than needing midday charging or constantly worrying about power levels, the G4 PRO KOKO lets users relax and vape freely through workdays, errands, or travel. Charging through USB-C is quick and clearly monitored on the touchscreen, so there is no second-guessing how long is left before it can be unplugged and slipped back into your pocket.

The 2-inch touchscreen eliminates the cluster of buttons typically found on devices with adjustable power. Menus and options appear clean and organized, and taps respond quickly. This isn’t just a decorative tech upgrade — it improves usability by allowing fast watt changes, quick access to modes, and full control over screen behavior. The display is built with a shatter-resistant structure to help withstand drops. Screen brightness, animation, battery saver mode, and device name customization all contribute to a more personal and polished feel.

Along one side of the device, a small but effective adjustable airflow slider allows the inhale to shift from a tighter, more traditional cigarette-like draw to a moderately open pull suited to warmer vapor production. The adjustment doesn’t make the device a wide-open direct-lung unit, but the range is wide enough that flavor and throat sensation can be fine-tuned to match the pod and user preference.

There are three output modes built into the software. Storm Mode delivers a faster ramp-up, giving an assertive throat sensation that some users look for when using lower-resistance coils or stronger nicotine strengths. Waves Mode maintains a smooth and consistent delivery from start to finish, ideal for steady flavor. Customize Mode allows a user to manually choose wattage and tailor the vape to match their liking. Rather than having to choose a “one-size-fits-all” default, this device encourages experimenting and finding the inhale style that actually feels right.

Two pod platforms work with this device, which expands coil options. The included Caliburn GPP Pods hold up to 3mL of e-liquid and are currently available in 0.4ohm, 0.6ohm, 0.9ohm, and 1.2ohm resistances, covering both restricted direct lung and smoother MTL uses. They connect magnetically and fill from the side, providing enough room for thicker e-liquids without struggling with bubbles or spillage.

The Caliburn G3 Pods, compatible as well, hold 2.5mL and come in 0.6ohm and 0.9ohm resistances. These pods have already proven themselves in earlier Uwell models, so users with G3 gear can switch over without buying entirely new pod packs.

Both pod lines are backed by U² Anti-Leak Technology to minimize mess during carry. All coils are integrated.

The operating system on the G4 PRO KOKO adds features that are rarely found in such a small format. Wattage adjustments, puff counter resets, and output mode switching can all be done with quick screen taps. Five Blind Draw UI themes add a playful collectible touch, with something different for users who enjoy customizing appearance. There are eight selectable interface languages including English, Arabic, Spanish, French, Russian, Italian, German, and Indonesian, helping make the device feel ready for an international audience. Screen timeout and brightness adjustments allow for either extended battery conservation or improved outdoor visibility depending on the situation.

Setup is as direct as possible. The user fills the pod through the side port, inserts it into the device, waits briefly to ensure the coil is fully saturated with liquid, adjusts the airflow slider if desired, and simply inhales. There is no fire button, and all tuning or vaping style changes happen through the touchscreen. This maintains the simplicity that KOKO devices are known for, even while this version adds far more control.

• 1 Caliburn G4 PRO KOKO Device
• 1 Caliburn GPP Pod — 0.4ohm (3mL)
• 1 Caliburn GPP Pod — 0.6ohm (3mL)
• 1 User Manual

• Coral Pink
• Cosmic Gray
• Crystal White
• Desert Gold
• Glass Blue
• Light Green
• Waves Black
• Mirror Silver

The color selection ranges from refined metallic finishes to bright pastel tones, giving users a choice between something subtle or something eye-catching.

The Uwell Caliburn G4 PRO KOKO is a strong showing for anyone who wants to keep their vape compact without giving up customization options that genuinely change performance. The touchscreen interface is not only modern but practical, making wattage adjustments and mode changes feel effortless. The significantly increased battery capacity means you can use the lower-resistance pods and stronger wattages the device supports without worrying about your charge running out.

For users who want a pocketable device with day-long endurance and customization that’s easy to control, the G4 PRO KOKO is a truly compelling option in the compact pod segment.