The XROS 3 was a capable pod system. If you are considering the XROS 4 and you own an XROS 3 that still works, the real question is whether the upgrade is worth the money, or whether the differences between the two generations are cosmetic. The answer depends on which part of the XROS 3 you find limiting. This article goes through each change with verified specifications and explains when the XROS 4 makes sense for an adult smoker or vaper in Dhaka, and when it does not.
One note before the specs: the XROS 4 is no longer the current generation. Vaporesso has since released the XROS 5 (1500mAh battery, 3A USB-C super charging) and the XROS 6 (1800mAh battery). We address the XROS 5 comparison directly in its own section below so you have the full picture before deciding.
The Vaporesso XROS 4 is a pod system with a 1000mAh battery, Type-C charging at 2A (approximately 30 minutes to full charge), a 3ml top-fill pod (2ml in TPD markets), and a wattage range of 11W to 30W across three output modes. It is compatible with the full XROS pod series in resistances from 0.4Ω to 1.2Ω. The 0.4Ω and 0.6Ω pods use COREX 2.0 mesh technology. The XROS 4 represents a meaningful upgrade over the XROS 3 primarily in charging speed (doubled from 1A to 2A), the introduction of an output mode screen, and the COREX 2.0 coil generation; the battery capacity is identical at 1000mAh.
What the XROS 4 Actually Is:
The XROS 4 is a closed pod system in the mouth-to-lung and restricted direct-lung (MTL to RDL) category. It is not a box mod. It does not support rebuildable coils. Every pod in the system uses a built-in mesh coil and is replaced as a complete unit when the coil degrades. The device is activated by either pressing the fire button or inhaling, depending on your preference.
The body is all-aluminum alloy, built as a single unibody construction. It is 120.8mm tall, 24mm wide, and 14mm deep, and weighs 51.5g with the pod installed. For a current cigarette smoker, it is roughly the size and weight of a slim lighter. You do not need any tools to use it.
The XROS 4 comes in three distinct variants: the standard XROS 4, the XROS 4 Mini, and the XROS 4 Nano. All three use the same XROS pod platform, which means coils are interchangeable across variants and across earlier XROS generations. That compatibility is the most practically useful fact about this device for anyone who already owns XROS hardware.
The Spec-to-Spec Comparison: XROS 4 vs XROS 3:
This is the section most current XROS 3 owners need. Here are the verified differences.
| Specification | XROS 3 | XROS 4 | Change |
| Battery | 1000mAh | 1000mAh | No change |
| Charging | Type-C, 5V/1A | Type-C, 5V/2A | Doubled charging speed (~30 min vs ~60 min) |
| Included pods (global) | 0.6Ω and 1.0Ω | 0.4Ω COREX 2.0 + 0.6Ω | Different resistance range in-box |
| Coil technology | First-gen COREX | COREX 2.0 (0.4Ω, 0.6Ω, 0.8Ω pods) | Updated in 0.4Ω to 0.8Ω pods |
| Output range | 11W to 16W (2 fixed modes) | 11W to 30W (3 selectable modes) | Expanded range |
| Screen / display | Neon light indicator only | Small LED screen + mode display | Screen added |
| Activation | Inhale only | Button + inhale | Button added |
| Build | Aluminum alloy | All-aluminum alloy unibody | Construction refined |
| Dimensions | 115.1mm x 23.6mm x 13.7mm | 120.8mm x 24mm x 14mm | Marginally larger |
| Pod capacity | 2ml | 3ml (global) / 2ml (TPD) | Larger in global version |
| Pod compatibility | Full XROS series (0.6Ω to 1.2Ω) | Full XROS series (0.4Ω to 1.2Ω) | Adds 0.4Ω compatibility |
The battery is unchanged. If your XROS 3 lasts you through the day comfortably, the XROS 4 will run identically in that respect. What changed is what happens before and after that charge cycle. The 2A charging on the XROS 4 cuts charge time roughly in half compared to the XROS 3. For someone who chains several charges across a heavy day, that is a real-world difference.
The wattage ceiling matters more if you use the 0.4Ω pod, which Vaporesso specifies runs best at 25W. The XROS 3’s 16W ceiling means the 0.4Ω pod was never a supported option on that device. If you use 0.6Ω or higher, the practical output difference between the XROS 3 and XROS 4 is smaller in day-to-day use.
Coil Compatibility: The Complete Picture:
Every XROS 4 variant accepts the full XROS pod series. The pod connects magnetically and the coil resistance is detected automatically by the Axon chipset. According to Vaporesso’s official XROS pod specification page, the best wattage by resistance is:
| Pod Resistance | Best Wattage (Vaporesso spec) | Draw Character | Recommended Nicotine Type |
| 0.4Ω COREX 2.0 | 25W | RDL (loose) | 3mg to 6mg freebase; 50/50 VG/PG or below |
| 0.6Ω COREX 2.0 | 21W | MTL to light RDL | Up to 20mg salt nicotine; 50/50 VG/PG |
| 0.8Ω COREX 2.0 | 16W | MTL | Up to 35mg to 50mg salt nicotine; 50/50 VG/PG |
| 1.0Ω | 12W | Tight MTL | 20mg to 50mg salt nicotine; 50/50 VG/PG |
| 1.2Ω | 10W | Tight MTL | 20mg to 50mg salt nicotine; 50/50 VG/PG |
The pod resistance figures, capacity, and best-wattage values in this table are taken directly from Vaporesso’s manufacturer specification page and are verified. The nicotine strength recommendations are derived from the draw character of each resistance and the confirmed VG/PG guidance; they are not independently tested by KandyVape staff and should be treated as starting points adjusted to individual tolerance.
The pairing that causes the most problems in this market: 50mg salt nicotine in a 0.4Ω pod. The 0.4Ω pod is built for loose, direct-lung draws at 25W. Running 50mg salt nicotine through it produces a throat hit that most users cannot tolerate, and the device cannot be returned once purchased. If you are transitioning from cigarettes and your instinct is to buy the highest nicotine strength available, pair it with the 0.8Ω or 1.0Ω pod, not the 0.4Ω.
VG/PG guidance: The XROS 4’s wicking ports are sized for 50/50 or high-PG liquids. High-VG liquids (above 60VG) do not wick fast enough at the pod’s rated wattage and the coil will begin to burn before the pod is fully saturated. This is not a device defect. It is a fundamental limitation of the pod format. If your preferred liquid is a high-VG shortfill or a thick freebase, the XROS 4 is not the right hardware for it.
The e-liquid carrier ingredients, propylene glycol and vegetable glycerin, are food-grade compounds with well-documented chemical profiles. Propylene glycol is classified as generally recognized as safe in food applications by the NIH’s PubChem compound database, and glycerol shares a similar safety classification. We note these classifications without asserting any conclusion about the safety of inhaling these compounds as heated aerosol. On that question, the 2022 evidence review commissioned by the UK Office for Health Improvement and Disparities, the most comprehensive systematic review to date, concluded that in the short and medium term, vaping poses a small fraction of the risks of smoking, while noting that vaping is not risk-free, particularly for people who have never smoked. KandyVape does not make independent health assessments; the OHID review is the source for that statement.
The Three Output Modes on the XROS 4:
The XROS 4’s Axon chip offers three selectable output modes, accessed by pressing the fire button three times. Vaporesso labels them strong, stronger, and strongest. The confirmed wattage window for the device is 11W to 30W; the chip distributes this range across the three steps, but Vaporesso does not publish the specific wattage for each individual mode. Check the printed label on your device if you require precise values, as these may vary slightly by production batch.
The XROS 4 Mini does not offer mode selection. Its Axon chip uses Smart Mode auto-coil detection: insert a pod, the device reads the resistance, and sets its output accordingly. If you want manual control over output, the standard XROS 4 is the correct choice. If you want the simplest possible operation and are not concerned about adjusting wattage, the Mini removes one variable entirely, which may suit a first-time buyer transitioning from cigarettes.
The XROS 4 also includes Pulse Mode, which the Axon chip manages automatically. Pulse Mode provides a brief power boost at the start of each draw to compensate for any lag between pressing the button and the coil reaching operating temperature. It is a chipset function, not a user-adjustable setting.
The XROS 4 vs XROS 5: Do You Need the Current Generation?
The XROS 5 is the current generation. The main verified differences:
| Specification | XROS 4 | XROS 5 |
| Battery | 1000mAh | 1500mAh |
| Charging | 5V/2A (Type-C, ~30 min) | 3A Super Charge (Type-C) |
| Screen | Small LED display | 0.88-inch HD screen |
| Pod compatibility | Full XROS series | Full XROS series |
| COREX pods | COREX 2.0 | COREX 3.0 (0.6Ω and 0.8Ω); other pods upgraded progressively |
The XROS 5’s 1500mAh battery is a 50 percent increase over the XROS 4. If battery life is the reason you are replacing your current device, the XROS 5 is a materially different product in that respect. The XROS 4 remains a fully functional device, and if stocked at a lower price point, it represents a rational choice for a buyer who charges regularly and whose main concern is the COREX 2.0 coil upgrade over older XROS hardware.
How to Verify Your XROS 4 Is Genuine:
The Dhaka market has a documented supply of counterfeit XROS hardware. A clone at a price below genuine retail is not a bargain; it is a device with a reprinted chipset that may deliver unregulated output, shortened coil life, and no legitimate verification result.
Here is the verification process for a genuine Vaporesso product, taken directly from the official Vaporesso authenticity check page:
Step 1. Physical label inspection. The anti-counterfeiting label is on the side of the package. Tilt it under light at different angles. The genuine label’s holographic “V” logo produces a 360-degree dynamic shift between viewing angles. On a fake label, the logo is static or shifts only in one plane. Counterfeit labels frequently reproduce the visual design well enough to pass a casual glance but fail the angle-shift test.
Step 2. QR code scan. Scratch the covering on the label to reveal the QR code. Scan it with your phone camera. The genuine result routes to the vaporesso.com domain. If the scanned URL does not resolve to vaporesso.com, the unit is not genuine. Counterfeiters sometimes create lookalike domains with a single character substituted.
Step 3. Code entry. The label carries a 14-digit or 12-digit verification code. Enter it at vaporesso.com/is-your-product-authentic. Do not enter it more than five times; exceeding this limit invalidates the code. A genuine unit returns a verified result the first time. A code that returns “already verified” on the first entry indicates the label has been copied from a genuine box and reused across multiple fake units, which is a known tactic.
What clones typically get wrong at the hardware level: The Axon chipset in a clone is either absent or replaced with a basic unregulated board. In practice, this means the three output modes may not function correctly, the device may not cut power at the end of a draw as specified, and the battery level indicator may not accurately reflect remaining charge. The COREX 2.0 branding may appear on a fake pod but the internal cotton is lower-density, producing earlier dry hits.
If you are buying in-store at our Mohammadpur location at Shop #22, Level #3, Sahabuddin Plaza, Adabar, ask to see the label verification before the device is transferred to you. We verify the authenticity code on every unit we stock, as the sole authorised partner for Vaporesso in this market.
Setup: The First Week:
The XROS 4 requires one step before first use that is skipped by roughly half of new buyers and is the most common cause of early dry hits: priming.
After filling a new pod, wait at least five minutes before drawing. The cotton inside the pod needs time to absorb e-liquid across the full wick before the mesh heats it. If you draw immediately on a freshly filled pod, the cotton surface ignites before the liquid reaches it, and the burnt taste that results will not leave that pod. The pod is not defective. The taste is the result of skipping the soak period.
After the soak, take three or four gentle draws without activating the fire button. This draws liquid through the wicking ports by suction alone and confirms the cotton is saturated. Only then should you fire the device.
Fill through the clamshell mouthpiece at the top: snap the mouthpiece backward, insert the nozzle of your e-liquid bottle at an angle against the inner wall of the port (not straight down the center, which introduces air bubbles), and fill slowly. The pod is transparent on the 3ml version, so you can watch the liquid level. Stop when the liquid is approximately 2mm below the fill line to allow for thermal expansion.
Ordering and Logistics:
KandyVape dispatches orders daily at 3:00 PM, including weekends. Orders confirmed before 3:00 PM on any day are dispatched the same day. Delivery timelines and charges are listed on our. Free shipping applies to orders of 3,500 BDT and above.
The XROS 4 is available at the current price listed on the product page. applies to all purchases, with no exceptions for buyer’s remorse or compatibility errors. This article exists because a wrong decision cannot be corrected after dispatch. If you are uncertain whether the XROS 4, XROS 4 Mini, or XROS 5 is the correct device for your use case, contact us before ordering.
FAQ:
Is the XROS 4 compatible with my existing XROS 3 pods?
Yes. The XROS 4 accepts the complete XROS pod series, including all pods manufactured for XROS 1, XROS 2, and XROS 3 hardware. The magnetic connection and pod dimensions are standardised across the full XROS line. Your existing XROS 3 pods, in whichever resistances you have, will seat correctly in the XROS 4. The COREX 2.0 technology is specific to the newer 0.4Ω, 0.6Ω, and 0.8Ω pods; older pods from previous generations use first-gen COREX coils and will still function, but without the COREX 2.0 characteristics.
What nicotine strength should I use with the XROS 4?
It depends on which resistance pod you use. With the 0.8Ω or 1.0Ω pod at a tight MTL draw, 20mg to 50mg salt nicotine is within the range most adult users transitioning from cigarettes report as adequate. With the 0.4Ω pod at a looser RDL draw and 25W output, 50mg salt nicotine will produce a throat hit that is uncomfortable for most people; 3mg to 6mg freebase is more appropriate at that resistance. Nicotine tolerance is individual, and the only reliable calibration is your own experience over the first few days.
How long will each coil pod last?
Pod lifespan varies significantly based on how frequently you vape, the wattage mode you use, the sweetness level of your e-liquid (high-sugar liquids caramelise faster on the mesh), and whether you prime the pod correctly before first use. Vaporesso’s COREX 2.0 technology is rated internally at approximately 30 percent longer lifespan than the previous generation, based on testing by Vaporesso Lab under controlled conditions. Real-world lifespan ranges from as little as several days with heavy use at high wattage and sweet liquid, to several weeks with moderate use at lower wattage. We do not state a fixed lifespan figure because no such figure is accurate across different usage patterns.
How do I know if the unit I am buying is genuine and not a clone?
Verify the 14-digit or 12-digit scratch code at vaporesso.com/is-your-product-authentic before you finalise any purchase. Physically check that the holographic label shifts the “V” logo dynamically under light at different angles. A static hologram is a counterfeit indicator. If you are buying from KandyVape in-store at Mohammadpur, you can request to run the verification code before completing the transaction.
When will my order arrive if I order today?
Orders dispatched before 3:00 PM on any day, including weekends, leave our warehouse the same day. Delivery timelines after dispatch depend on your location within or outside Dhaka. Full delivery timing and charge details are listed on our shipping and delivery page. We dispatch daily and do not hold orders.
What happens if the device does not suit me after I receive it?
KandyVape operates a strict no-return, no-refund policy on all products. There are no exceptions for preference or compatibility errors. This is stated openly because it is the reason this article is as detailed as it is: a wrong decision cannot be corrected after dispatch. If you have any uncertainty about whether the XROS 4 is the right device for your draw style, nicotine preference, or existing pod stock, contact us before ordering. We would rather answer a question now than have you own a device that does not suit you.
Should I buy the XROS 4 or the XROS 5?
If battery life is a daily frustration with your current device, the XROS 5’s 1500mAh battery represents a meaningful improvement over the XROS 4’s 1000mAh. If battery life is adequate and you primarily want the COREX 2.0 coil upgrade over an older XROS device, the XROS 4 addresses that need and may be available at a lower price point. Both devices use the full XROS pod platform, so your coil choice is identical regardless of which body you buy.
If you want to confirm which pod resistance and nicotine pairing is correct for your draw style before placing an order, contact KandyVape before 3:00 PM on any day for same-day dispatch.
You can also visit us in person at Shop #22, Level #3, Sahabuddin Plaza, Adabar, Mohammadpur 1207, Dhaka, where you can inspect the device and run the authenticity code verification before any transaction is completed. Current pricing for the XROS 4 and XROS 4 Mini is listed on the relevant product pages.
