The NEXA Ultra II 50K is the most technically advanced disposable vape I've tested in the 50K puff category. The Juicy Lock sealed activation genuinely delivers fresher flavor out of the box than any competitor. The Crystal Tank removes all guesswork on e-liquid levels. At $23.99 (down from $32.99), the cost-per-puff undercuts most 35K devices. If VOOPOO's engineering credibility matters to you, this is the disposable to buy.
What Is the NEXA Ultra II 50K?
The NEXA Ultra II is the second generation of VOOPOO's flagship disposable vape. It's a two-part device: a 16mL transparent Crystal Tank pod snaps onto a battery unit that holds an additional 4mL of e-liquid in cotton storage — totaling 20mL. The two pieces ship separated in the box, which is the core of NEXA's Juicy Lock system: the wick stays dry until you snap the device together for the first time, sealing in freshness during transit and shelf storage.
Compared to the original NEXA Ultra 50K, the Ultra II is nearly 10% shorter (92mm height), lighter (89g), and features an upgraded 900mAh battery (up from 800mAh). The snap-together assembly is also far simpler than the original's awkward two-piece connection.
Specifications
| Puff Count | 50,000 (Normal) / 30,000 (Turbo) |
| E-Liquid Capacity | 20mL total (16mL tank + 4mL cotton storage) |
| Nicotine | 5% (50mg/mL) Nicotine Salt |
| Battery | 900mAh Rechargeable (USB-C) |
| Coil | Dual 0.9Ω Mesh |
| Display | 3D Curved Screen (battery %, mode indicator) |
| Airflow | Adjustable slider (MTL to loose RDTL) |
| Dimensions | 92mm × 55mm × 28mm |
| Weight | 89g |
| Material | PC/PCTG |
| Charging | USB-C (pass-through supported) |
| Activation | Draw-activated (auto-fire) |
| Flavors | 15 options |
Design & Build Quality
The Ultra II uses a rounded rectangular body with fully smoothed edges and a semi-soft mouthpiece cover — a detail I wish more brands would copy. The PC/PCTG shell is dense and scratch-resistant. After a week of pocket carry, mine looked essentially new.
The 3D curved screen occupies most of the front face. It displays battery percentage center-stage with the current mode (NORM or TURBO) above or below. Animated circuit-board light effects wrap around the device body when you draw — flashy, but you can disable them with a 3-second button hold to enter Dark Mode. The screen stays on either way.
The Crystal Tank section is the standout visual element. The transparent sidewall lets you monitor e-liquid levels at a glance, with graduation marks for precision. This is vastly superior to the "smart indicator" approach most competitors use, where a digital estimate replaces your own eyes.
Build quality is excellent. The device stands upright without wobble, the airflow slider operates smoothly, and the snap-together assembly clicks into place with satisfying firmness. This is VOOPOO's hardware engineering experience showing through.
Performance
Flavor
This is where the Juicy Lock system earns its existence. On first draw, the Ultra II delivers flavor intensity that's noticeably stronger than comparably-aged competitors sitting on the same shelf. The sealed tank means no oxidation during transit, and the dual 0.9Ω mesh coils extract solid flavor throughout the device's lifespan. I tested Blue Razz Ice, Watermelon Ice, and Fcuking Fab — all three maintained consistent flavor quality past the 70% e-liquid mark, which is better than most disposables that start fading around 50%.
The Crystal Tank's secondary benefit: by visually separating e-liquid from the cotton reservoir, you can actually see when you're running low rather than hitting dry cotton by surprise. Several reviewers have reported the Ultra II continues to produce vapor well beyond when the tank appears empty — the 4mL cotton storage provides a substantial buffer.
Battery & Charging
The 900mAh battery supports pass-through charging (you can vape while connected to USB-C). Full charge takes approximately 60–80 minutes. The standout metric: roughly 100+ puffs from just one minute of charging. For a device this size, that's exceptional emergency performance.
In Normal mode, a full charge lasts several days of moderate use. Turbo mode drains faster — expect to charge daily with heavy usage. The USB-C port is on the bottom, and the device charges while standing upright.
Modes & Airflow
Three quick presses of the button toggles between Normal (50K puffs, lower wattage) and Turbo (30K puffs, higher wattage, denser vapor). Normal mode is my daily recommendation — the flavor profile stays intact, battery lasts longer, and the vapor production is still satisfying. Turbo is for when you specifically want thicker clouds and don't mind the tradeoffs.
The bottom airflow slider covers a usable range from tight MTL to a very restricted RDTL. It's not wide-open DTL — if you're coming from sub-ohm tanks, set expectations accordingly. But for a disposable, the adjustment range is above average.
NEXA Ultra II vs Original NEXA Ultra 50K
| Feature | Ultra II (2025) | Original Ultra (2024) |
|---|---|---|
| Battery | 900mAh ↑ | 800mAh |
| Height | 92mm ↓ | ~102mm |
| Assembly | Snap (Juicy Lock) | Two-piece manual |
| Dark Mode | ✅ | — |
| E-Liquid | 20mL | 20mL |
| Puff Count | 50K/30K | 50K/30K |
The Ultra II is a strict upgrade over the original. Bigger battery, smaller body, easier assembly, and the same 50K puff capacity. If you're choosing between the two, the Ultra II wins in every category that changed.
NEXA Ultra II vs Competitors
| Spec | NEXA Ultra II | RAZ RX 50K | Geek Bar Ice Prince 50K |
|---|---|---|---|
| Puffs | 50,000 | 50,000 | 50,000 |
| E-Liquid | 20mL | 20mL | Not disclosed |
| Transparent Tank | ✅ | — | — |
| Sealed Activation | ✅ Juicy Lock | — | — |
| Dual Power Modes | ✅ | — | ✅ |
| Adjustable Airflow | ✅ | — | ✅ |
| Flavors | 15 | 100+ | 25+ |
| VOS Price | $23.99 | ~$25.99 | ~$27.99 |
The Ultra II's advantages over both competitors are the Crystal Tank and Juicy Lock — features no other 50K device currently offers. RAZ counters with an unmatched flavor library (100+ vs 15), and the Geek Bar brings a stronger brand reputation in the mainstream market. For a deeper comparison, see our NEXA vs RAZ Vape breakdown.
Who Should Buy the NEXA Ultra II?
- Upgrade seekers: If you used the original NEXA Ultra and liked it, the Ultra II is better in every way that matters.
- Flavor-first vapers: The Juicy Lock system makes a measurable difference in first-draw freshness. If stale flavor on new devices bothers you, this solves it.
- E-liquid monitoring types: The Crystal Tank is a genuine usability improvement over the guessing game that every opaque disposable forces you to play.
- Value shoppers: At $0.48 per 1,000 puffs, the Ultra II undercuts most 35K devices on a per-puff basis.
Who Should Look Elsewhere?
- Flavor variety hunters: 15 flavors is limited. If you rotate through flavors frequently, RAZ's 100+ lineup is the better ecosystem.
- Pod system users: If you want to swap flavors without committing to a full device, the NEXA Flex or Foger's magnetic pod system are better fits.
- Wide-open DTL vapers: The airflow maxes out at tight RDTL. This is not a sub-ohm replacement.
Frequently Asked Questions
How many puffs does the NEXA Ultra II actually last?
In Normal mode, you'll realistically get 40,000–50,000 puffs depending on draw length and frequency. Turbo mode caps around 25,000–30,000. Multiple reviewers have reported the device continues producing vapor past when the Crystal Tank appears empty, thanks to the 4mL cotton storage buffer.
What's the difference between Normal and Turbo mode?
Normal mode runs the coil at lower wattage — longer lifespan (50K puffs), cooler vapor, and better preservation of menthol/ice top notes. Turbo increases wattage for denser clouds and intensified sweetness but reduces total puffs to ~30K. Toggle with 3 quick presses of the side button.
Can you charge the NEXA Ultra II while vaping?
Yes. The Ultra II supports pass-through charging via USB-C. You can draw on the device while it's connected to a charger. Full charge from empty takes about 60–80 minutes.
Is the NEXA Ultra II the same as the NEXA Pro 30K?
No. The Ultra II and Pro 30K are different devices. The Ultra II offers 50,000 puffs with dual mesh coils and the Crystal Tank system. The Pro 30K delivers 30,000 puffs with a quad mesh coil and the largest display in the NEXA lineup (3.2" HD). The Pro prioritizes vapor output; the Ultra II prioritizes longevity and flavor freshness. For a full comparison of all NEXA devices, see our NEXA Vape Complete Guide.
Is the NEXA Ultra II authentic on VapesOnlineShop?
Yes. We're an authorized NEXA distributor. Every Ultra II ships from our Memphis, TN warehouse with the original authenticity verification code intact. Scan the QR code on the packaging to verify on NEXA's official site.
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Nicotine Warning: This product contains nicotine. Nicotine is an addictive chemical. NEXA vape products are intended for adult smokers and vapers aged 21+ only.