Zeus tank duel, Z Subohm SE vs Z Subohm 5

Shop for a Zeus tank today and you land on two 29 mm tanks that look like twins, Geekvape’s Z Subohm SE and Z Subohm 5. Same diameter, same 810 drip tip, same top airflow, and retailer listings that copy one another. We set them against each other on five checkable criteria (size, coils, capacity, filling and airflow), using the spec pages and user guide the manufacturer publishes, to work out which one deserves a place on your mod.

Which Zeus tank to pick, the Z Subohm SE or the Z Subohm 5

For a first purchase, the Z Subohm 5 is the easier one to get started with. Its fill cap stays attached to the tank, it ships with two coils from the XM Boost generation, and it is the model Geekvape documents most thoroughly, user guide included.

The Z Subohm SE keeps two arguments. It is 4.2 mm shorter, and it takes the same coils as its successor, Boost coils included. Anyone who already owns an SE therefore has no technical reason to swap it for a newer Zeus tank.

The spec table for two 29 mm Zeus tanks

Every figure below comes from the product pages of Geekvape’s official store. An empty cell means the manufacturer does not give the value. One retailer listing gives the SE a height of 53 mm and a 70 to 80 W range for its 0.15 ohm coil, figures that differ from the manufacturer’s page and stay out of the table.

Criterion	Z Subohm SE	Z Subohm 5
Diameter	29 mm	29 mm
Height	51.9 mm	56.1 mm
Capacity	5.5 ml, 2 ml TPD version	5.5 ml, 7 ml or 2 ml depending on the glass
Spare glass in the box	5.5 ml	7 ml
Pre-installed coil	Z 0.15 ohm XM, 70 to 85 W	Z 0.2 ohm XM Boost, 70 to 80 W
Spare coil	Z 0.4 ohm, 50 to 60 W	Z 0.4 ohm XM Boost, 50 to 60 W
Drip tip	810	810, replaceable
Filling	top fill	top fill, attached push cap
Airflow	top, adjustable	top, adjustable
Stated coil life	up to 60 ml	up to 60 ml

Three rows really separate the two tanks, the height, the coils in the box and the cap. Diameter, drip tip, airflow layout and stated coil life are identical on paper.

Z coils, one platform shared by both generations

Coils often decide a tank purchase, and this is where the duel gets closest. Both models belong to the same coil family, the Z Series, which fits from the underside of the tank.

Different coils in the box

The SE comes out of its box with a 0.15 ohm XM coil rated from 70 to 85 W, the hungrier of the two kits. The Z Subohm 5 starts on a 0.2 ohm XM Boost coil, capped at 80 W. Both include a 0.4 ohm spare rated from 50 to 60 W, the only one suited to a mod that tops out around 60 W.

One family that moves between them

The Z Boost coil page names both the Z Subohm SE and the Z Subohm 5 among the tanks it is designed for. Geekvape’s FAQ on these coils adds that the old and new versions share the same interface and remain interchangeable. An XM Boost coil bought for a Zeus 5 therefore fits an SE without an adapter, and the reverse holds for classic Z coils.

30 or 60 ml, two documents that disagree

The Z Subohm 5 user guide, published by Geekvape on 15 December 2025, presents the XM Boost coil as doubling coil life. It puts the average life of the previous Z coils at around 30 ml of e-liquid, against up to 60 ml for the Boost version.

The SE spec page, however, already quoted coils with “double service life” and up to 60 ml. The two 60 ml figures therefore describe different coils, and the real gap between the two tanks comes down to the coil generation you screw in, not to the tank itself.

Capacity, glass and the 2 ml UK version

Both pages list a standard capacity of 5.5 ml, and the Z Subohm 5 adds a 7 ml bubble glass in its box. Those figures apply to versions sold outside the UK and the EU.

In the UK, refillable tanks are limited to 2 ml, and nicotine e-liquid to 20 mg/ml in bottles of 10 ml at most. Geekvape sells the SE in a 2 ml TPD version on its official store, and the Z Subohm 5 page also lists a 2 ml capacity. The 7 ml glass therefore changes nothing for a UK buyer, who will be comparing two 2 ml tanks.

The height difference does remain. At 56.1 mm against 51.9 mm, the fifth-generation Zeus tank adds 4.2 mm, roughly 8% more than the SE, for the same standard capacity. On a compact mod, those few millimetres matter more to the silhouette than to the vape.

Filling, drip tip and airflow on these Zeus sub-ohm tanks

On these three points, both Zeus sub-ohm tanks share the same architecture. The differences come down to a cap mechanism and a few words on a spec page, not to a different design.

The cap, the real novelty of the Z Subohm 5

Geekvape describes a cap on the Z Subohm 5 that slides in the direction of the arrow until the fill hole is exposed, then pushes back into place. It stays attached to the tank, so nothing has to be set down on the table while filling. The guide also warns against overfilling and advises waiting 3 to 5 minutes before vaping a new coil.

The SE page lists top filling and a safety lock, without saying which part the lock acts on.

Same 810 drip tip, same top airflow

Both tanks take a wide 810 drip tip and an adjustable airflow set at the top. That layout, typical of the range, keeps the air inlets away from the coil and the e-liquid to limit leaks. Choosing between a very open direct-lung draw and a slightly restricted one works the same way on both, by turning the ring. To place that kind of draw, our MTL vs DTL comparison explains the two ways of inhaling.

The verdict by vaping profile

Between two tanks that share their diameter, drip tip and coils, the right choice depends on what you already own and on the mod that will carry them. Three profiles emerge from the spec pages.

First sub-ohm tank

The Z Subohm 5. Its attached cap makes filling simpler, and its two Boost coils, at 0.2 and 0.4 ohm, cover 50 to 80 W. It needs a mod able to hold those wattages, such as the ones in our battery box mod ranking led by the Geekvape Legend 5.

Compact mod or short setup

The Z Subohm SE. At 51.9 mm tall it is the more discreet of the two, and nothing stops it from taking the Boost coils of the next model. Its stock 0.15 ohm coil, rated up to 85 W, does however call for a mod that delivers that much power.

Current SE owner

Keep your tank. Buying a newer-generation Zeus tank brings little beyond the attached cap, since XM Boost coils already fit the SE.

FAQ

These five questions come up around these two tanks, and the duel above does not cover them.

Does a Zeus tank fit any box mod?

The Z Subohm 5 user guide states a standard 510 connection, the one found on most high-power mods. That leaves the 29 mm diameter, shared by both tanks, which will overhang the edge of a mod with a narrower top plate.

How do you replace the glass on a Zeus tank?

The same guide has you unscrew the bottom section, gently push the old glass out, then fit the new one before screwing everything back. It recommends checking the position of the sealing ring along the way, and swapping it for the spare from the parts bag if it looks worn.

Do you need a tool to remove the coil from a Zeus tank?

Yes, a small coil tool comes in the box of the SE as well as the Z Subohm 5. On the Z Subohm 5, the guide has you unscrew the base with the tank upside down, then the tool pulls out the used coil before the new one goes in.

How many coils come in a pack of Z replacements?

The official store sells Z Series coils in packs of five, in classic or Boost versions depending on the value. One pack reference therefore serves the SE and the Z Subohm 5 alike.

Which colours do the Z Subohm SE and the Z Subohm 5 come in?

The official store lists the SE in six finishes (black, blue, stainless steel, rainbow, gunmetal and gold) and the Z Subohm 5 in five (glossy black, cold silver, rainbow, gunmetal grey and glossy gold). Blue exists only on the SE.

Zeus tank SE or 5, what to remember before choosing

The Z Subohm SE and the Z Subohm 5 share their 29 mm diameter, 810 drip tip, top airflow and Z coil family. The 5 stands out for its attached cap and the Boost coils it ships with, the SE for its lower height.

Before ordering a Zeus tank, checking which coil generation goes inside matters more than the tank’s model number. The same reading, manufacturer page and user guide side by side, works for any tank on the market.

Editorial content intended for adults. Vaping products can contain nicotine, which is a highly addictive substance. Vaping products are not for sale to anyone under 18 in the UK. This spec comparison is not a buying recommendation.