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RELX HERC 12000 vs Vozol Vista 20000: The 20000-Puff Question

By ONEWING GROUP LIMITED · Updated 2026 · Reading time: 8 min

The Vozol Vista 20000 is the most interesting device in the high-capacity conversation precisely because it takes every trend to its extreme: a 24ml pre-filled reservoir, a transparent cyberpunk chassis, a full colour screen, six wattage levels on a 360° dial, and up to 20,000 puffs — driven by a 650mAh battery. That last number is the whole story. The RELX HERC 12000 asks a different question: what is the most device you can deliver without the customer ever needing a cable? Here is how the two philosophies compare.

The 20000-puff question, answered with arithmetic

A 650mAh cell vapourising 24ml of liquid at Vista’s rated output must be recharged on the order of thirty times across the device’s life — and that is at the conservative end of the wattage dial. Turn the dial up and the calculus worsens on both sides: the six power levels range the experience from smooth to intense, and Vozol itself rates the device 14,000-20,000 puffs depending on setting. Publishing that range is honest. It also concedes the central point: at maximum settings, the headline number shrinks by thirty percent.

The HERC’s answer is to refuse the question. Eighteen millilitres, 2600mAh, one calibrated output, zero recharges, 12,000 puffs that mean the same thing on every unit. It is less headline and more contract.

The dial: six levels of control, six levels of variance

The Vista’s 360° adjustment gear is, mechanically, the most satisfying control in the category — reviewers love the feel of it, and the live UI animations on the colour screen are genuinely well executed. But every adjustable device imports the same trade: the customer becomes a variable in the device’s performance. Two identical units on different wattage levels are, functionally, two different products with two different lifespans.

For a consumer who enjoys tuning, that is the feature. For a trade buyer, it is a support conversation waiting to happen: “mine lasted less than my friend’s” is almost always a dial, not a defect. The HERC has no dial. Its single output is the same on every unit ever made, which is precisely why its 12,000 rating is comparable unit to unit.

Screens and transparency: a genuine tie

Both devices take instrumentation seriously, and this round is a draw on substance. The Vista’s full colour display shows e-liquid, battery and power mode with the best visuals in the category; the transparent chassis even lets you watch the reservoir level physically. The HERC’s smart side display shows the same two critical values — battery and liquid — with less theatre and equal clarity. Vozol wins the show-floor demo; the HERC matches the daily-driver function. On a charge-free device, the display carries more operational weight, since it is the only status panel the device will ever have.

Capacity honesty: 24ml that needs a cable versus 18ml that does not

There is no disputing the raw number: 24ml beats 18ml by a third. The honest framing is what each millilitre costs to actually use. The Vista’s liquid is delivered through recharge cycles, and its 650mAh cell is the smallest battery-to-liquid ratio in this comparison series — the price of the transparent chassis and the dial was paid out of the battery budget. The HERC’s 18ml arrives through a cell with energy to spare, behind an aluminium wall, with the display telling you exactly how much is left.

Per delivered millilitre, the HERC is the more complete machine. Per headline millilitre, the Vista wins the sticker and loses the experience.

Verdict: spectacle versus self-sufficiency

The Vista 20000 is the category’s showpiece and deserves the label: boldest design, best screen, most tactile control, biggest reservoir. It wins style, display quality, capacity-on-paper and the enthusiasm press. The HERC wins battery architecture (four times the cell), delivered capacity without infrastructure, output consistency, build material and unit-to-unit comparability.

If your channel sells spectacle, stock the Vista and sell charging cables with it. If your channel sells devices that finish what they started, the HERC remains the more honest 18ml on the market.

The Extremes of the Category

Frequently Asked Questions

Is 20000 puffs realistic?

Only at the gentlest of the Vista’s six settings; Vozol itself rates the range as 14,000-20,000. Higher wattage means more liquid and battery per puff, so the headline number shrinks as the dial turns up - our puff-maths guide explains the arithmetic.

Which battery actually lasts longer?

Per charge, the Vista is fine for a day of moderate use. Across the whole device, the HERC’s 2600mAh delivers its entire reservoir with no cable; the Vista’s 650mAh must be recharged roughly thirty times to do the same job on more liquid.

Is the transparent design a durability concern?

Polycarbonate transparent shells are tougher than they look, but they show scuffing and scratching permanently. The HERC’s aluminium develops patina instead of wear-marks and dissipates coil heat better - a practical difference over an 18ml device life.

Which should wholesale buyers prefer?

They answer different briefs. The Vista suits showpiece retail and customers who enjoy tuning. The HERC suits channels where consistency, zero infrastructure and unit-to-unit comparability protect margin and reduce support load.