Eighteen hundred milliamp-hours is the largest cell fitted to any pod kit in this catalogue, and a 2.51-inch touchscreen is by some distance the largest display. For an owner, that combination mostly means a device you charge less often and configure more.
What it takes is the same as its smaller sibling, and this page sets out the reorder.
The cartridge
GPP, with the coil sealed inside it. There is no separate coil to buy for this device, and nothing on Replacement Coils will fit. The cartridge is the wearing part, and it is on Replacement Pods.
That cartridge is shared with the G3 and G5 families as well as the standard G4, so a spare is portable across UWELL devices rather than tied to this one.
Three modes and the airflow
Storm, Waves, and a Custom mode that shapes the output across the length of the puff. Custom is the interesting one and the reason the touchscreen is as large as it is — shaping a curve is not something a two-button interface handles well.
Airflow is stepless. No clicks, no detents, no numbered positions, which means finding a setting you like and remembering roughly where it was rather than returning to a marked one.
Output goes up to thirty-five watts, set on screen. UWELL publishes no minimum figure, so none is quoted here.
What to fill it with
The resistance decides it, not the device. The higher-resistance GPP cartridges want a 50/50 salt around the twenty-milligram mark, which is where you will find both ELFBAR ELFLIQ 10ml and BAR Salts. On the lower-resistance ones, the draw opens, the liquid consumption rises, and ten milligrams is the sensible strength.
This is not a sub-ohm freebase device in any configuration. A 70/30 bottle belongs in a tank or a pod mod, not in a GPP cartridge.
Charging and consumables
USB Type-C, though UWELL publishes no input rating for it, so no charging time or amperage appears here. The cell is sealed, and Batteries is not a shelf this kit uses.
Cartridge life tracks the liquid rather than the device. Sweet and dessert bottles finish sooner than plain fruits, and since the coil cannot be swapped, the whole cartridge separately goes with it. Order spares with the liquid.
Product and variant overview
One device, one cartridge platform. The Caliburn G4 Pro takes GPP cartridges with the coil sealed in, on an 1800mAh cell, with Storm, Waves and Custom output modes.
Compatibility and related products
GPP is shared with the G3, G4, and G5 families.
Liquid: 20mg salt at 50/50 on higher-resistance cartridges; 10mg on the lower ones. No 70/30 freebase.
Buying guidance
Buy cartridges rather than coils. There is no coil sold separately for this platform.
The big cell reduces how often you charge, not how often you refill. Cartridge capacity is unchanged.
Use Custom mode if you want the device to do something the others cannot. Otherwise the two presets are simpler.
Stepless airflow means noting where you had it before removing the cartridge.
UWELL publishes no charging rating for this model, so treat any time figure you read elsewhere with caution.
Kenya and Nairobi relevance
A larger cell matters more in Kenya than the specification suggests, because a device that lasts two days rather than one is a device you are less likely to be caught out by. Nairobi orders are dispatched same-day, 24 to 48 hours to the rest of the country.