RELX Flagship Device Comparison 2025: Classic vs Infinity vs Phantom vs Infinity 2 (30-Day Technical Audit)

The RELX Flagship Audit: Is the Upgrade Worth the Hype?

This is a 30-day, fully hands-on technical audit of RELX’s global flagship lineup. No buzzwords, no marketing copy—only hardware behavior, firmware characteristics, airflow physics, coil tuning, and the real-world ergonomics that matter to long-term users.

RELX has earned a reputation as the “Apple of closed-system vapes,” but with four generations still widely available in global markets, choosing the right device is far from straightforward. This review places the Classic, Infinity, Phantom, and Infinity 2 on the bench for a genuine performance comparison. We also dive into the Korean-exclusive hybrids—an unusual but strategically important branch of the RELX ecosystem.

1. The Everyday Carry (EDC) Factor

For many US and EU users, a vape isn’t an accessory—it’s part of the daily carry setup, living in the same pocket as cards and phone. Build quality, ergonomics, and durability under friction matter more than spec sheets.

RELX Classic — The Legacy Stick

The Feel: Ultra-light aluminum, sharp edges, unmistakably “first-generation hardware.”
The Drawback: Micro-USB charging. In 2025, carrying a separate cable just for your vape is a genuine inconvenience.

RELX Infinity / Phantom — The Unibody Era

Build Quality: Thickened aluminum, rounded edges, satin coating with excellent fingerprint resistance.
Mouthpiece: The “Fit-in-Lip” curvature is surprisingly functional—it seals naturally and improves draw comfort.

RELX Infinity 2 — The Tactile King

The Difference: A physical power slider. The click is firm, mechanical, and satisfying—designed to avoid accidental mode switching.

2. Power Management & The “Lunch Break Charge” Test

We measured battery longevity and recharge behavior under typical 9-to-5 usage.

Device	Battery	Real-World Endurance	Charging Speed
RELX Classic	350mAh	Died by ~4 PM during heavy use	Slow (~60 min)
RELX Infinity	380mAh	Full workday	Medium (~45 min)
RELX Phantom	380mAh	Full workday + better UI feedback	Medium (~45 min)
RELX Infinity 2	440mAh	Excellent	Fast (15 min to ~80%)

Why Phantom feels safer: The four-bar “Tidal Light” UI gives precise battery feedback. Infinity 2 has more power, but Phantom is still the anxiety-free champion for people who constantly check their level.

Why Infinity 2 wins overall: A 15-minute charge delivering enough power for the night is a real-world advantage, especially in fast-paced cities where plug-in opportunities are brief.

3. Acoustics: The Stealth Test

We measured airflow noise in a quiet office environment:

Classic: Noticeable whistle due to straight airflow path.
Infinity / Phantom: Near-silent “Maze Airway” system—ideal for stealth draws.
Infinity 2: Slight electronic hum in Boost Mode, caused by PWM driving 8W output.

4. Global vs Local: The Korean Hybrid Strategy

If you’ve walked through Seoul or Busan convenience stores, you’ve likely seen RELX devices that don’t exist anywhere else. This is the RELX × Bubblemon hybrid ecosystem—real hardware variations tailored to local taste culture.

Why Korea gets different hardware:

Local preference for cold, sweet, fruit-heavy profiles.
Demand for visible liquid level → transparent tanks.
Hybrid/Mesh coils tuned for higher sweetness output (≈30% stronger flavor).

Global Version (Ceramic): Stability, consistency, smoother long-term performance.

Korean Hybrid Version: Harder-hitting, sweeter, more intense—but burns out faster.

5. Final Verdict — Which Device Matches Your Life?

Scenario A — Business Traveler

Pick: Infinity or Infinity 2
Why: These models are compatible with the RELX Charging Case. Phantom is not.

Scenario B — The Visual Controller

Pick: Phantom
Why: Best-in-class battery visibility.

Scenario C — Tech Enthusiast

Pick: Infinity 2
Why: Adjustable power slider, 8W Boost mode, and the industry’s best fast-charging experience.

Bottom Line

The Phantom dominates in aesthetics and battery visibility, but the Infinity 2 is the only RELX device offering a true leap in performance. If you are upgrading from a Classic, skip the intermediate models and go straight to the Infinity 2.