Two separate tanks and two heating elements in one body, with a switch that selects which one the battery feeds. It lets one device hold two different contents without mixing them. The trade-off is one cell powering two elements, and twice as many seals that can fail.
Editorial desk · Written and checked in house · Updated
A dual chamber device is what the name says: two independent tanks in a single body, each with its own element, selected by a switch or a twist of the base.
| Part | Doubled? |
|---|---|
| Tank | Yes — two, kept separate |
| Heating element | Yes — one per tank |
| Airway | Usually two, sometimes joined at the mouthpiece |
| Battery | No — one cell serves both |
| Charging port | No |
That last pair is the whole trade-off. The cell is the same size as a single-chamber device of similar dimensions, but it has twice as much content to heat, which is why nearly every dual chamber device is rechargeable rather than sealed.
It solves a specific problem: carrying two different contents without carrying two devices, and switching between them without the first one's taste following the second. Because the tanks never meet, a strong flavour on one side does not carry across.
Some devices allow both chambers at once, blending at the mouthpiece. Whether that is a feature or a muddle depends entirely on what is in them.
If the mouthpiece is shared, it is the one part where the two sides meet. A cotton bud through it between switches keeps each side tasting of itself. Never rinse the body under a tap — there is a cell inside.
Upright and cool, like any other device, and more strictly than most: a dual chamber body on its side has two tanks pooling against their seals rather than one. See storing a device.
A used device is electronic waste with a lithium cell in it, and it does not belong in household rubbish or a kerbside recycling bin. Take it to a battery collection point, a household hazardous waste site, or a shop that accepts device take-back. Never crush, puncture or bin one.
Upright, mouthpiece up, somewhere cool and dark, around half charged if it is going away for a while. Heat thins the contents and causes leaks, cold thickens them and dries the wick, and a device left on its side floods its own airway.
A clog is nearly always cold, thick contents blocking a narrow airway, or condensation collecting in the mouthpiece. Warm the cartridge in your hands, stand it upright, clear the mouthpiece with a cotton bud or a paperclip, then take short gentle draws rather than hard ones.
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