The people at Innokin have a long and proud legacy of designing the best vaping equipment on the market for beginners. If you’re still learning how to vape or haven’t made the switch yet and are still researching, you know that a vape tank that you can fill yourself will always give you the best possible experience because using a refillable tank makes it possible for you to buy your e-liquid by the bottle instead of buying pre-filled cartridges or pods. If you’re new to vaping, though, you might have looked at some of the tanks currently on the market and decided that they look a bit too large and complex for a beginner. With the Innokin Endura T20S, there’s no need to worry. This vape tank is designed for you.
The Innokin Endura T20S tank is a small vape tank that will fit on most vape pens with no overhang. It includes two atomizer coils, so you can try them both and see which one provides the vaping experience you want. The 1.5-ohm coil operates at 13-14 watts and provides cooler vapour clouds with a more refined flavour. If you’re craving bigger clouds and bolder flavours, try the 0.8-ohm coil, which operates at 16-18 watts and offers truly impressive vapour production.
Compatible with Innokin Prism T20S coils.
Features:

The Innokin T20S is a compact 2ml mouth-to-lung tank built around the Prism S coil system. Its straightforward top filling, fixed MTL airflow and relatively low power requirements make it an easy tank to live with, whether you're putting together a simple vape pen setup or pairing it with a small adjustable-wattage mod.
One of the T20S's main advantages over the original T20 is its choice of two coil resistances. The 1.5Ω option provides a cooler, lower-powered vape, while the 0.8Ω coil increases the warmth and vapour production without turning the T20S into a full-blown sub-ohm cloud tank.
The T20S is built around a mouth-to-lung inhale, with a relatively tight draw that suits users who prefer modest vapour production and a more cigarette-like vaping style.
Choose between a 1.5Ω coil for a cooler 13-14W vape or a 0.8Ω coil for a warmer 16-18W experience with a little more vapour.
The 2ml tank fills from the top, so there's no need to remove it from your device whenever you need to add e-liquid. Unscrew the top cap, refill and replace the cap securely.
The T20S uses a conventional 510 thread, allowing it to work with many compact vape pens and regulated mods rather than limiting it to a single Innokin battery.
The T20S uses Innokin Prism S coils, which are available in 0.8Ω and 1.5Ω resistances. Both are intended primarily for MTL vaping, but they provide noticeably different experiences.
| Prism S Coil | Wattage | Vape Style | Best For |
|---|---|---|---|
| 0.8Ω | 16-18W | MTL | Warmer vapour, stronger flavour and slightly greater vapour production |
| 1.5Ω | 13-14W | MTL | Cooler vapour, lower power consumption and a more restrained vape |
Replacement coils are available separately in packs of five. Shop Innokin Prism S replacement coils.
The 0.8Ω Prism S coil runs at 16-18W. That extra power produces warmer vapour and a little more of it, making this the better option if you want the T20S to feel somewhat punchier while retaining its MTL character.
The 1.5Ω coil operates at just 13-14W and provides a cooler, more restrained experience. Its lower power requirement can also help your battery last longer between charges.
Neither choice is inherently better. If you're unsure, the advantage of the T20S is that you can try both and decide whether you prefer the warmer 0.8Ω setup or the gentler 1.5Ω option.
The Prism S coil system is best matched with relatively thin e-liquids designed for lower-powered MTL devices. A 50VG/50PG vape juice is an excellent general-purpose choice for both coil resistances.
Traditional 50/50 e-liquid works well with both Prism S coils and gives you a wide range of nicotine strengths and flavours to choose from.
Nic salts are also well suited to the T20S because its MTL draw and relatively modest vapour output work comfortably with the nicotine strengths commonly found in salt-based e-liquids.
Thick high-VG shortfills are generally better suited to higher-powered sub-ohm tanks. For reliable wicking in the T20S, 50/50 e-liquid is the safer choice.
Keep the tank upright and unscrew the top cap to expose the filling area.
Fill through the opening at the side, avoiding the central airflow chimney. The UK tank holds up to 2ml of e-liquid.
Screw the top cap back into place securely before using the tank.
If you've just installed a new Prism S coil, leave the filled tank standing for several minutes before vaping so the wick has time to absorb the liquid.
The Prism S system uses a convenient push-fit coil design. Remove the tank from your device, access the coil from the base and pull the used coil out. Push the replacement firmly into position, reassemble the tank and refill it with e-liquid.
The T20S is a good fit for anyone who wants a conventional refillable tank without the size, airflow or complexity of modern sub-ohm hardware. Its compact 20.5mm diameter works particularly well on smaller devices, while the standard 510 connection gives you plenty of freedom when choosing a compatible battery or mod.
It also makes sense for vapers who enjoy MTL vaping but want more flexibility than the original T20 offers. Having both 0.8Ω and 1.5Ω Prism S coils available lets you adjust the warmth and vapour production without changing tanks.
If your priority is large clouds and an open direct-to-lung inhale, though, the T20S isn't designed for that job. It's firmly an MTL tank focused on flavour, simplicity and moderate vapour production.
The T20S uses Innokin Prism S coils. You can choose a 0.8Ω coil rated for 16-18W or a 1.5Ω coil rated for 13-14W.
No. The original T20 uses a different Prism T20 coil. The T20S requires Prism S coils, so the two coil systems should not be confused despite the very similar tank names.
Choose the 0.8Ω Prism S coil if you prefer warmer vapour and slightly greater vapour production. Choose the 1.5Ω coil for a cooler, lower-powered MTL vape.
Yes. The T20S is designed primarily for mouth-to-lung vaping, with a tighter draw and substantially less vapour production than a typical sub-ohm DTL tank.
A 50VG/50PG e-liquid is an excellent choice. Both conventional freebase vape juice and nic salts can work well with the T20S and its Prism S coils.
The UK version has a 2ml e-liquid capacity.
Yes. The tank has a standard 510 connection and can be used with compatible regulated mods and vape batteries that support the relatively low wattages required by its Prism S coils.