The Nexa Ultra 50K was already one of the most capable disposables of its generation β the two-part transparent tank, 20 mL capacity, and dual power modes set it apart when it launched. The Nexa Ultra II keeps all of that and improves the things that actually mattered to real users: a more powerful battery, a completely redesigned assembly system, a slimmer body, and a refreshed flavor lineup. This isn't a cosmetic rebrand. It's a targeted second-generation upgrade.
This article breaks down every meaningful difference between the two β spec by spec, upgrade by upgrade, and flavor by flavor β so you know exactly what you're getting with either device.
- At a glance: both devices side by side
- Full specifications compared
- The five real upgrades in the Ultra II
- Juicy Lock: the assembly fix everyone needed
- Display: Light Mode, Dark Mode & stealth vaping
- Battery: 800 mAh β 900 mAh β what it means in practice
- Flavor lineup: what stayed, what's gone, what's new
- Who should buy each version?
- Final verdict
At a glance
- 800 mAh battery
- 20 mL transparent tank (5 mL pre + 15 mL attachable)
- Manual foil-seal assembly β learning curve
- 3D curved display β single light mode
- NORM (50K) / Turbo (30K) power modes
- Dual mesh 0.9Ξ© coil
- 15 flavors (original lineup)
- Adjustable airflow β slider on base
- 900 mAh battery (+12.5%)
- 20 mL transparent tank (4 mL pre + 16 mL attachable)
- Juicy Lockβ’ β squeeze-to-connect, no foil fuss
- 3D curved display β Light Mode + Dark Mode
- NORM (50K) / Turbo (30K) power modes
- Dual mesh 1.0Ξ© coil
- 15 flavors (refreshed lineup)
- Improved airflow slider β stiffer, pocket-safe
Full specifications compared
| Specification | Nexa Ultra 50K | Nexa Ultra II 50K |
|---|---|---|
| Puff count (Normal) | ~50,000 | ~50,000 β |
| Puff count (Turbo) | ~30,000 | ~30,000 β |
| E-liquid capacity | 20 mL (5 mL pre + 15 mL) | 20 mL (4 mL pre + 16 mL) Refined |
| Battery | 800 mAh | 900 mAh +100 mAh |
| Charging | USB-C (0.5A) | USB-C fast charge Faster |
| Coil resistance | 0.9Ξ© dual mesh | 1.0Ξ© dual mesh Updated |
| Assembly system | Manual foil-seal + O-ring | Juicy Lockβ’ β squeeze to connect New |
| Display | 3D curved β single mode | 3D curved β Light & Dark Mode New |
| LED animation | Always-on circuit board effect | Toggle on/off (stealth mode) New |
| Body size | 103mm Γ 53mm Γ 29mm / 95g | Slimmer profile Compact |
| Airflow control | Adjustable slider β base | Stiffer slider β pocket-resistant Improved |
| Power modes | NORM / Turbo | NORM / Turbo β |
| Nicotine strength | 5% (50 mg/mL) nic salt | 5% (50 mg/mL) nic salt β |
| Activation | Draw-activated | Draw-activated β |
| Flavors | 15 (original lineup) | 15 (refreshed lineup) Updated |
The five real upgrades in the Ultra II
Every generation gets called an upgrade. Not every upgrade deserves the name. Here are the five changes in the Ultra II that genuinely affect your daily experience β ranked by how much they matter.
Juicy Lock: the assembly fix everyone needed
The original Nexa Ultra's two-part design was genuinely innovative β a transparent pre-filled tank that snapped onto the battery unit to deliver 20 mL of e-liquid without dry hits. The concept was right. The execution had one friction point: the foil-seal, O-ring assembly that required careful alignment to avoid leaks and was unintuitive on first use.
The Ultra II fixes this with the Juicy Lock system β first introduced on the Nexa PIX 35K β which replaces the finicky foil-and-ring process with a simple squeeze-to-connect mechanism. You press the two halves together until you hear a click, and the device is sealed, primed, and ready to vape. No foil to remove, no O-ring to align, no second-guessing whether it's connected properly.
One independent reviewer described the Ultra II's assembly as "literally a snap to put together" compared to the original β and that simplicity has a real impact on the day-to-day experience, especially for vapers using the device for the first time.
Display: Light Mode, Dark Mode & stealth vaping
Both generations feature NEXA's distinctive 3D curved display with animated circuit-board lighting effects that activate on every draw. The Ultra II adds a meaningful customization layer: the ability to toggle between Light Mode and Dark Mode, and to disable the LED animation entirely for stealth vaping.
The stealth mode addition is one of those small quality-of-life features that becomes surprisingly useful in practice β in meetings, at the office, or simply for vapers who prefer their device not to announce itself visually with every draw. It's a feature that costs nothing to add and improves the device meaningfully for a segment of regular users.
Battery: 800 mAh β 900 mAh β what it means in practice
A 100 mAh increase doesn't sound dramatic on paper β but in context of how the Nexa Ultra platform works, it matters more than the raw number suggests.
The original Ultra's 800 mAh battery was already well-matched to the 20 mL tank β reviewers consistently noted that 30 seconds of charging delivered over 100 puffs, and a full charge took roughly 80 minutes. At 900 mAh, the Ultra II extends that session endurance proportionally: more puffs between plugging in, slightly longer before the battery becomes the limiting factor on a heavy vaping day.
Both versions support pass-through charging β you can vape while charging. For a 20 mL device that's meant to last weeks, that convenience matters more than a smaller device where charging is a brief, daily event.
The faster USB-C charging in the Ultra II is a practical upgrade for heavy users. Where the original's 0.5A charging rate kept sessions relatively short during a charge, the Ultra II's improved charge rate closes that gap.
Flavor lineup: what stayed, what's gone, what's new
Both devices carry 15 flavors β but the Ultra II's lineup is a curated refresh, not a straight port. Some original flavors were retired. New ones were added. Here's the full picture:
Ten flavors carried over unchanged β the bestsellers that earned their place. Five were retired: B-Pop, Cherry Bomb, Cool Mint, Mango Oasis, and Triple Berry. In their place, five new profiles: Black Cherry (bold, deep cherry), Lemon Frozen (zesty citrus with a hard freeze finish), Strawberry Colada (tropical strawberry meets coconut), Strawberry Mango (juicy dual-fruit warmth), and Peach Dive (fresh peach with a cool edge). The new lineup skews toward more complex, layered profiles β less single-note, more depth.
For fans of retired flavors: If B-Pop, Cherry Bomb, or Triple Berry were your go-to on the original Ultra, those profiles don't currently exist in the Ultra II lineup. The Fcuking Fab β a mixed berry candy blend β is the closest remaining option to that flavor family.
Who should buy each version?
- Specifically want B-Pop, Cherry Bomb, Triple Berry, Mango Oasis, or Cool Mint β those flavors only exist in Gen 1
- Found a deal on the original and are comfortable with the foil-seal assembly
- Are price-sensitive and the Ultra II carries a premium
- Want the best version of this platform without exceptions
- Were frustrated by the original's assembly process β Juicy Lock solves it entirely
- Want more battery endurance and a slimmer device
- Vape in settings where the LED animation is disruptive β Dark Mode covers you
- Are buying NEXA for the first time β the Ultra II is the right starting point
- Want access to Black Cherry, Lemon Frozen, or Strawberry Colada
Final verdict
The Nexa Ultra II is the better device β not because the original was bad, but because NEXA identified the right things to fix. The Juicy Lock assembly alone removes the one friction point that frustrated first-time users of the original. The 900 mAh battery, slimmer body, and Light/Dark display modes are meaningful additions that don't compromise anything that made the Gen 1 worth recommending. If you're buying new, the Ultra II is the straightforward answer. The original Ultra remains worth picking up only if the Gen 1-exclusive flavors are a priority β or if price is the deciding factor.
WARNING: Both products contain nicotine β an addictive chemical. For adults 21+ only.
