Quick Overview
The UK vaping market is evolving rapidly. With single-use disposables phased out, refillable pod systems have become the standard. Among these, the Hayati X4 stands out as a versatile, high-performance option.
This system balances convenience, consistent flavour, and sustainability.
At Ecig News, we thoroughly tested the Hayati X4 to check its battery life, pod performance, airflow, and real-world usability. This review helps UK vapers determine if this open-system pod kit is the right choice for 2026.
Table of Contents
- Introduction: Why Hayati X4 Is a Milestone
- Technical Specifications & Interface
- Real-World 7-Day User Experience
- Airflow and Power Settings Guide
- Pod Design, Coil Options, and Liquid Compatibility
- Comparison With Other UK Pod Systems
- Troubleshooting and Common Mistakes
- Cost and Environmental Considerations
- Frequently Asked Questions
- Final Verdict
Introduction: Why Hayati X4 Is a Milestone
Hayati has long been associated with prefilled and disposable devices. The X4 marks their first fully open, refillable system, combining simplicity with long-term cost savings.
For UK vapers, the X4 offers an easy-to-use, eco-friendly device. It is designed to maintain flavour quality and consistent nicotine delivery. Without the waste associated with disposables.
Technical Specifications & Interface
The Hayati X4 features a 1300mAh rechargeable battery. This outperforms standard pocket pod kits, which typically range from 700–900mAh. USB-C fast charging brings the battery to full capacity in roughly 45 minutes.
The device is equipped with a smart HD display providing:
- Battery percentage
- Real-time voltage output
- Automatic coil resistance detection
- Puff counter for daily tracking
All functions are controlled via a single-button loop. This makes it intuitive for beginners and experienced users alike.
| Operational Metric | Hayati X4 | Traditional Disposables | Pre-Filled Large Puff Systems |
|---|---|---|---|
| Initial Cost | Moderate | Very low | Moderate |
| Running Cost | Low | High | Medium |
| Fluid Delivery | Refillable 2ml | Fixed 2ml | Multi-chamber prefilled |
| Battery | 1300mAh Rechargeable | Single-use | Low-capacity rechargeable |
| Waste Footprint | Low | High | Medium |
Real-World 7-Day User Experience
Days 1–3: Initial Setup and Draw Response: After filling a fresh pod and priming the mesh coil, the X4 delivers immediate, smooth draw activation. Power output is consistent, and the battery maintains stability.
Days 4–5: Coil Lifespan and Durability: Even after repeated refills with sweetened e-liquids, the mesh design prevents hot spots. This ensures the coil holds up well over time. The side-fill sealing gasket eliminates leaks and condensation, making it highly reliable for daily use.
Days 6–7: Flavour Consistency: Flavour remains vibrant throughout, with no noticeable drop-off in quality. The mesh coil continues to deliver a clean, consistent taste, even after extended use with heavier e-liquids.
Airflow and Power Settings Guide
The Hayati X4 operates between 11W and 25W, allowing precise control of vapour density and warmth.
Airflow Slider Settings:
- Fully Open: Maximum cooling, thick clouds
- Mid: Balanced warmth, richer flavour
- Fully Closed: Tight draw, cigarette-like sensation
Inhalation Style Settings:
- MTL (Mouth-to-Lung): 11–14W, restricted airflow
- RDL (Restricted Direct-Lung): 18–25W, moderate-to-open airflow
Pod Design, Coil Options, and Liquid Compatibility
The X4 includes three pod resistances:
- 0.6Ω: 18–25W, RDL, dense vapour
- 0.8Ω: 13–18W, loose MTL, moderate clouds
- 1.2Ω: 11–14W, tight MTL, discreet output
Mesh coil technology ensures even wicking and prevents dry hits, even with 20mg nic salts. Pods are eco-friendly and replaceable once coils reach end-of-life.
Comparison With Other UK Pod Systems
| Feature | Hayati X4 | Lost Mary BM6000 | Elf Bar ELFX |
|---|---|---|---|
| Power Range | 11–25W | Fixed | Auto-adjust |
| Airflow | Slider | Fixed | Toggle |
| Interface | HD Smart Display | Basic LED | Multi-colour Indicator |
| Coil Options | 0.6 / 0.8 / 1.2Ω | Single | 0.6 / 0.8Ω |
| Liquid Customisation | Universal | Proprietary | Universal |
Troubleshooting and Common Mistakes
- Burnt taste: Check wattage and prime fresh pods 5–10 minutes before vaping.
- Leaking: Ensure side-fill seals and pod alignment are correct.
- Connectivity issues: Clean the gold-plated contacts on the device and pod.
- High-nicotine harshness: Use 1.2Ω or 0.8Ω pods for smoother delivery.
Cost and Environmental Considerations
The X4 reduces long-term costs compared to disposables. Each pod is refillable multiple times. Plus, the rechargeable battery eliminates the need for frequent device replacements. Waste is minimised since only pods are discarded.
Frequently Asked Questions
Can I run high-nicotine salts in all Hayati X4 pods?
High-nicotine salts work best with the 0.8Ω and 1.2Ω Hayati X4 pods. Using them in 0.6Ω pods may produce a harsh throat hit or an overly strong nicotine effect. Always match nicotine strength to the pod resistance for smooth vaping.
When should I replace a Hayati X4 pod?
Replace the pod when you notice flavour fading, reduced vapour, or a burnt taste. Sweet or dessert-flavoured e-liquids may shorten pod life, so swap pods as needed to maintain performance.
Why does the smart display flash when drawing?
A flashing display usually indicates a poor pod connection. Clean the contacts, remove any condensation, and ensure the pod is fully seated. This restores proper operation.
Can I use third-party e-liquids in Hayati X4 pods?
Some refillable Hayati X4 pods allow compatible third-party e-liquids. Make sure the nicotine strength and VG/PG ratio match the pod specifications. Using the wrong liquid can cause leaks, dry hits, or muted flavour.
How can I extend the lifespan of my Hayati X4 pods and coils?
Avoid chain vaping, stay within recommended wattage ranges, and prime new coils properly. Regularly clean the pod connection and use moderate VG liquids to maintain flavour and vapour quality.
Is the Hayati X4 suitable for beginners?
Yes, the Hayati X4 is beginner-friendly. Its smart display helps track usage, pods are easy to replace, and adjustable settings are simple to manage without complex setup.
Final Verdict
The Hayati X4 is a high-quality refillable pod system for UK vapers. Its 1300mAh battery, adjustable wattage, mesh coil pods, and HD display provide consistent flavour and vapour. Environmentally conscious and cost-effective, the X4 is a smart choice for vapers who care about sustainability. For those seeking reliable performance and great value, it’s one of the top refillable pod systems to consider in 2026.
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