If you've tried your hand at the XROS 4 and are ready to take it to the next level, it's an excellent upgrade. Like the XROS 3, it offers just the right balance of features for both newbies and seasoned hands. However, the XROS 4 offers more features that experienced vapers will appreciate.

In this guide, we take a deeper look into the XROS 4 from Vaporesso and what it has to offer potential vapers.

Key Features of the Vaporesso XROS 4

Before looking into the design and performance of the XROS 4, below is a list of the key features the device offers to give you an idea of what to expect:

• 1000mAh built-in battery
• 2A USB-C charging
• COREX 2.0 heating technology
• Three adjustable output modes
• Button and automatic inhale activation
• Precision airflow control
• Small colour display
• UK-compliant 2ml refillable pods
• Top-filling pod design
• Integrated mesh coils
• SSS leak-resistant construction
• Compatibility with XROS pods from 0.4ohm to 1.2ohm

Heating Technology

The XROS 4 introduced COREX 2.0 technology to the standard XROS line. This updated system uses a refined mesh structure and improved wicking material to heat the e-liquid more evenly.

For the vaper, that means faster activation and better, clearer flavours from the start of the inhale. Fruit blends taste bright, menthol liquids remain crisp and sweeter profiles have enough depth.

The coils and heating technology help provide even heating, reducing the harsh spots that can occur when parts of a coil become hotter than others. The vapour feels smoother and more consistent, provided the pod has been filled correctly and given enough time to absorb the liquid.

Besides improving vaporisation, the COREX 2.0 technology also helps to increase pod lifespan.

Precision Airflow Control

The XROS 4 has an airflow slider on the side of the device that allows gradual adjustment. You are not restricted to a simple open or closed position. Move the control in small increments, and you can feel the draw tighten or air out.

The slider also lets you compensate for small differences between pods. You might find that a 0.8ohm pod feels best with the opening halfway closed, while a 0.4ohm option needs more airflow to remain comfortable. There is no single correct position, so it is worth making small changes until you find your preference.

Three Output Modes

The XROS 4 offers three power levels, typically labelled low, medium, and high. Rather than showing a specific wattage, the device adjusts the available output around the resistance of the installed pod.

Low mode produces a cooler, gentler vape and uses less battery power. Medium offers a balanced everyday experience, while high mode creates a warmer inhale with more immediate flavour and vapour.

Changing the setting is simple. Press the control button three times to cycle through the available levels. The display indicates which mode is active, so you do not have to guess.

Design and Build Quality

The XROS 4 sticks feature a similar pen-style design for which the range is known. The device stands at approximately 120.8mm tall, 24mm wide and 14mm deep, and slips comfortably into a pocket without creating an awkward bulge.

It has an aluminium-alloy unibody construction, which gives it a reassuring feel while keeping the weight at around 51.5g. It is light enough for everyday carrying but does not feel flimsy or hollow in the hand.

It also has rounded edges and a narrow shape, making it comfortable to grip. You also get to choose from a wide selection of finishes, ranging from the understated black and silver to brighter patterned colourways. You can choose something discreet or go for a design with a little more personality.

Battery Performance and Charging

The device comes with a built-in 1000mAh battery that is well matched to the XROS 4's size and power range. Moderate MTL users may get through a full day on a single charge, though battery life will vary considerably depending on the installed pod and output mode.

A 1.0-ohm or 1.2-ohm pod on the lower power setting places relatively little demand on the battery. The 0.4 ohm pod on high power consumes energy more quickly because it heats more liquid and produces additional vapour.

The display provides a clearer idea of the remaining charge than a single basic indicator light. You can check the battery before leaving home and decide whether it needs a quick top-up.

Charging is one of the XROS 4’s stronger practical features. The USB-C port supports a 2A input, which is faster than the 1A charging found on several older XROS devices.

Performance

Flavour is where the XROS 4 makes its strongest impression. COREX 2.0 pods deliver a clean, responsive vape, while the airflow and three power settings let you decide how warm or restrained it feels.

With a 0.8-ohm pod, medium power, and partially closed airflow, the device provides a smooth, everyday MTL inhale. Vapour is controlled, the flavour is well defined, and the overall experience works nicely with balanced 50/50 liquids and nicotine salts.

The 0.6ohm pod increases warmth and vapour without moving too far from familiar MTL territory. Open the airflow, and it becomes a comfortable RDTL option. This resistance is a useful middle ground if you are not sure which draw style you prefer.

A 0.4ohm pod gives the XROS 4 its liveliest performance. It creates a fuller inhale and noticeably denser vapour, particularly in high mode. Use a lower nicotine strength with this pod, as it vaporises more e-liquid per draw.

The 1.0-ohm and 1.2-ohm pods move in opposite directions. They produce a cooler, tighter and more discreet vape while extending battery life. These are good choices for former smokers and anyone who prefers higher-strength nicotine salt liquids.

The top-fill design makes maintenance simple. Snap the mouthpiece off to reveal the filling port, add your chosen e-liquid, and snap it back on. When using a new pod, allow at least 5 minutes for the wick to fully saturate before inhaling.

Who Should Upgrade to the XROS 4?

The XROS 4 is a worthwhile upgrade for anyone using an older fixed-output pod kit who wants more flavour control without moving to a complicated device. Its three power settings and adjustable airflow provide meaningful flexibility while remaining easy to understand.

It is particularly suitable for:

• Disposable users moving to refillable vaping: Inhale activation keeps the experience familiar, while refillable pods offer greater choice and long-term value.
• Owners of older XROS devices: COREX 2.0, faster charging and the lower-resistance pod options provide a noticeable performance improvement.
• MTL and RDTL vapers: Its broad pod compatibility means one device can cover both a tight cigarette-style inhale and a warmer, airier draw.
• Vapers who dislike complex menus: The three output modes are easier to manage than precise wattage controls.
• People who prioritise portability: The aluminium body is slim, light and sturdy enough for daily carrying.

Someone who already owns an XROS 5 or XROS Pro 2 will not gain much by moving backwards to the XROS 4. Those newer devices offer larger batteries, more advanced screens and updated heating technology. Cloud-focused DTL users may also find its 30W-class pod performance too restrained.

For everyone else, the Vaporesso XROS 4 remains a polished and dependable kit. It offers excellent flavour, straightforward controls and enough pod choice to adapt as your preferences develop. If you want a refillable vape that feels capable without becoming demanding, the XROS 4 from Flawless Vape Shop is still well worth considering.