You already know you want a JNR 100K puff kit. The real question? P4 Stellarc or P5 GlassRock. Both run 100,000 puffs, both use the same refillable pod platform, and both rock a 5% salt nic formula. But they're built for different people — and picking the wrong one means living with a kit that doesn't match how you actually vape.
We broke down every spec, tested both side by side, and mapped out exactly who should grab which. No fluff, just the numbers and real-world differences that matter.
P4 Stellarc vs P5 GlassRock — Specs at a Glance
Before we get into the details, here's the full spec sheet. Both kits share the JNR 100K platform, but the hardware differences are bigger than most people expect.
| Spec | P4 Stellarc 100K | P5 GlassRock 100K |
|---|---|---|
| Puff Count | 100,000 | 100,000 |
| E-Liquid Capacity | 32mL per pod | 64mL total system |
| Battery | 1,200mAh + 280mAh dual | 1,900mAh single |
| Coil | 1.2Ω dual mesh | Dual mesh |
| Nicotine | 5% salt nic | 5% salt nic |
| Charging | USB-C | USB-C |
| Screen | Curved screen + stellar animation | Mini screen + battery indicator |
| Body | Solid housing | Transparent glass body |
| Airflow | Fixed draw | Adjustable airflow ring |
| Flight Mode | Twist-to-lock safety | Standard lock |
| Kit Price | $23.99 | Check latest price |
| Pod Price | $21.99 | Check latest price |
The numbers tell a clear story. The GlassRock wins on raw hardware specs — bigger battery, more juice, adjustable airflow. The Stellarc fights back with a better screen, smaller footprint, and that dual-battery architecture that keeps the pod module lightweight.
Battery Life: 1,200mAh vs 1,900mAh — Does It Actually Matter?
On paper, the GlassRock's 1,900mAh battery crushes the Stellarc's 1,200mAh. That's 58% more capacity. For heavy vapers pulling 300+ puffs a day, that difference means charging every other day instead of every night.
But here's what most comparison articles miss: the Stellarc runs a dual-battery system — a 1,200mAh main cell in the base unit plus a 280mAh cell in the pod module. That secondary battery keeps the pod module powered during swaps, so you never lose your puff counter or screen data when you plug into a different base.
The GlassRock takes a simpler approach with one beefy 1,900mAh cell. No secondary battery, no fancy handoff — just raw endurance. Both charge over USB-C, and neither supports pass-through charging (you can't vape while they're plugged in).
Bottom line: If you vape heavily and hate charging, the GlassRock's 1,900mAh wins. If you swap pods between multiple base units, the Stellarc's dual-battery design is smarter engineering.
For a detailed breakdown of real-world battery life, pod timing, and how many days each kit lasts between refills, check out our guide on how long a JNR vape lasts.
Design & Build: Curved Screen vs Transparent Body
These two kits look nothing alike, and that's by design. The Stellarc leans into tech — its curved OLED screen wraps around the body with animated star-field graphics, puff counter, battery percentage, and coil resistance. It feels like holding a tiny smartphone.
The GlassRock goes transparent. A clear glass body lets you physically see the e-liquid level, coil condition, and internal components. No guessing, no screen dependency — just look through the device. The trade-off? It's noticeably bigger and heavier than the Stellarc.
Size matters here. The Stellarc slips into a jeans pocket without a bulge. The GlassRock? You'll feel it. If you're commuting, traveling, or just prefer a discreet carry, the Stellarc's form factor is a total win. If you vape mostly at home or don't mind the extra bulk, the GlassRock's transparency is genuinely useful — you'll never accidentally run a dry pod.
Airflow: Fixed Draw vs Adjustable — A Bigger Deal Than You Think
This is the single biggest functional difference between these two kits, and it flies under the radar in most reviews.
The Stellarc runs a fixed airflow. JNR tuned it for a restricted-direct-lung (RDL) draw — tighter than a wide-open sub-ohm tank but looser than a mouth-to-lung cigarette-style pull. It hits a sweet spot for most vapers, but you're locked into that one draw resistance.
The GlassRock has an adjustable airflow ring built into the base. Twist it open for a loose, cloudy draw. Tighten it down for a firm MTL-style pull that concentrates flavor. This alone makes the GlassRock the better pick if you switch between styles throughout the day — loose draws with fruit flavors, tight draws with menthol, for example.
If you've ever wished your vape had a tighter or looser draw, the GlassRock's airflow ring solves that permanently. If you're the type who finds a setting and sticks with it, the Stellarc's pre-tuned draw saves you from ever overthinking it.
Pod System: Same Core Platform, Different Capacity
Both kits use JNR's modular pod system: a replaceable pod with a built-in coil, plus an auto-refill reservoir that feeds e-liquid into the pod as you vape. When the coil degrades (roughly 7,000-8,000 puffs per pod in real-world use), you swap the entire pod — coil included. No messy coil changes.
The Stellarc ships with 32mL per pod (2mL active tank + 10mL auto-feed + 20mL e-liquid reservoir). The GlassRock's system holds 64mL total across its pod and refill setup, which means fewer refill bottle swaps over the life of the kit.
Here's the question everyone asks: can you use Stellarc pods in the GlassRock? Short answer — no. The pod form factors are different. Stellarc pods are designed for the P4 base, GlassRock pods for the P5 base. They're not cross-compatible. If you own both kits, you're buying separate pod SKUs.
The dual mesh coil technology is identical across both lines — a 1.2-ohm dual mesh setup that balances flavor intensity with vapor production. Flavor quality between the two kits is functionally the same. The difference is purely in capacity and how the pod connects to the base unit.
Cost Per Puff: Breaking Down the Real Math
The Stellarc kit runs $23.99 with replacement pods at $21.99 each. Each pod delivers roughly 7,000-8,000 real-world puffs. That works out to about $0.003 per puff on pods alone — or roughly $3 per 1,000 puffs.
The GlassRock's pricing isn't publicly listed across all retailers yet (it launched after the Stellarc). Based on the 64mL system and similar component costs, expect pricing in a similar ballpark. The GlassRock's larger capacity means fewer pod swaps — which saves hassle, even if the per-puff cost is comparable.
Either way, both JNR 100K kits beat the per-puff cost of most single-use disposables by a wide margin. A typical 5,000-puff disposable at $15 costs $3 per 1,000 puffs with zero reusability. The JNR platform gives you the same cost with a reusable base unit and way less waste.
Which JNR 100K Kit Fits Your Style?
After running both kits through real-world use, here's the honest breakdown:
Grab the P4 Stellarc if you...
- Travel or commute daily — the compact size and twist-to-lock flight safety mode make it the better on-the-go kit
- Love gadgets — the curved screen with animated graphics is genuinely fun to look at
- Prefer simplicity — fixed airflow means one less thing to fiddle with
- Own multiple JNR bases — the dual-battery system keeps pod data intact during swaps
Grab the P5 GlassRock if you...
- Vape heavily — 1,900mAh battery means serious all-day stamina
- Want airflow options — the adjustable ring lets you dial in your exact draw preference
- Hate surprises — the transparent body shows exactly how much liquid is left
- Mostly vape at home — the bigger size isn't an issue on a desk or nightstand
Both kits deliver the same 100,000-puff lifespan, the same 5% salt nic formula, and the same dual mesh coil flavor quality. This isn't a "good vs bad" choice — it's a fit question. Match the kit to how and where you vape, and you'll be happy with either one.
Still on the fence? Check out the full Stellarc 100K deep-dive review or explore all JNR flavors to see which pods you'd pair with your kit.