The Innokin Coolfire Z80 Nex and SMOK X-Priv Solo both land at the same 80 W max output and both include a display, putting them on equal footing in a few key areas. Beyond that, the two devices are built around different design choices that make some categories hard to score directly.
This comparison sticks strictly to the specs and notes available, calling out ties where the numbers match and flagging categories where there isn’t enough comparable data to pick a winner.
| Spec | Innokin Coolfire Z80 Nex | SMOK X-Priv Solo |
|---|---|---|
| Image |  |  |
| Max outputPerformance | 80 W | 80 W |
| Battery typeBattery | Replaceable 18650 | Single 18650 |
| DisplayConvenience | Yes | Yes |
| Charging portBattery | USB-C | Type-C |
| Coil/tank compatibilityCapacity | Full Z Coil series | SMOK TF-D Sub-Ohm Tank / TFV Mini V2 Tank |
| Safety protectionsBuild | Not stated | High output warning, overtime, short-circuit, overheating, low-battery warning |
| Build materialBuild | Zinc alloy, PCTG, leather | Not stated |
| Best US priceat time of comparison | $45.77* | $39.49* |
| Read Review & Best Price | Read Review & Best Price |
* Lowest US price we found on 6 Aug 2026. Prices change often — see each review below for live pricing.
Performance
Both devices share an identical 80 W max output, which is why this category is a tie. Neither spec sheet gives a reason to expect one device to out-perform the other at the top end, since the ceiling is the same number on both sides.
Battery
The Innokin Coolfire Z80 Nex uses a replaceable 18650 cell, while the SMOK X-Priv Solo uses a single 18650. These are different setups — one swappable, one fixed as described — but the facts provided don’t include runtime, mAh, or charge-cycle figures, so there isn’t enough comparable evidence to call a winner here.
Convenience
Both products include a display, and both charge over a USB-C style port (labeled USB-C on the Innokin Coolfire Z80 Nex and Type-C on the SMOK X-Priv Solo), so day-to-day usability looks similar on paper. This category is a tie based on the matching display feature.
Capacity
No tank capacity, e-liquid volume, or coil resistance figures are listed for either device, only the compatible coil and tank series. Without actual capacity numbers, there’s too little evidence to declare a winner in this category.
Build
The Innokin Coolfire Z80 Nex lists zinc alloy, PCTG, and leather as build materials, while the SMOK X-Priv Solo has no build material stated. Since one side of the comparison is simply missing, this category can’t be fairly judged either way.
The Innokin Coolfire Z80 Nex suits buyers who want a device with named, physical build materials (zinc alloy, PCTG, leather) and a replaceable 18650 battery.
The SMOK X-Priv Solo suits buyers who value a clearly documented set of safety protections, including high output warning, overtime, short-circuit, overheating, and low-battery warning.
The verdict
Neither the Innokin Coolfire Z80 Nex nor the SMOK X-Priv Solo comes out as an overall winner here — the two tie on max output and display, and the remaining categories (battery, capacity, and build) don’t have enough matching data to compare directly. The SMOK X-Priv Solo does list a detailed set of safety protections that the Innokin Coolfire Z80 Nex’s sheet doesn’t mention, which may matter to some buyers, but it isn’t scored as a category on its own here. Choosing between them comes down to which stated features — replaceable battery versus stated safety protections, or named build materials versus unlisted ones — matter most to the individual buyer.