Pickwise Notes

How to choose a cordless vacuum (and when an upright suits you better)

Not tested by us. We did not test any products for this guide. It is based on research from the references listed at the end, which are cited throughout.

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This guide helps you decide between cordless stick and upright designs. It explains which specs to compare for suction, dust separation, filtration, runtime, weight and bin size, and which to treat with caution.

Start with the type of vacuum that fits your home

Vacuum cleaners come in several forms: stick, handheld, upright, canister and robot. All of them pull in dirt with suction, and many add agitation to loosen debris from carpets, hard floors and other surfaces. A cordless vacuum is usually a stick or handheld design, so the first decision is whether you want a light tool for quick jobs or a larger machine for whole-house cleaning.[1]

Think about where you will use it. A cordless vacuum suits quick cleanups, stairs and small apartments. An upright is more likely to suit large areas of carpet. Write down your floor types and the rooms you clean before you compare any specs, because the right answer for a small hard-floor flat differs from the right answer for a carpeted family home.[1]

Read suction numbers carefully

Suction power is measured in airwatts, which is not the same as the motor's input power in watts. The airwatt figure combines airflow, water lift and power consumption, and a standard formula exists for it. A listing that quotes only motor watts tells you little about how well the machine pulls dirt from the floor, so look for airwatts or for airflow and water lift quoted separately.[4]

Water lift is the maximum suction force when the hose opening is blocked. Higher values mean the machine can lift heavier or denser material, and high suction is usually needed for deep carpet cleaning or for vacuuming liquids. If you have thick carpet, give water lift more weight. If you mostly have hard floors, airflow and a good floor head matter more than peak suction.[4]

Be careful with benchmarks. The typical range of 500 to 800 airwatts applies to single-motor central vacuum systems, which are built into a home, not to portable battery machines. Do not assume a cordless model should match it. Use airwatts to compare cordless models with each other, and only when they are measured the same way. Also note that airwatts from two motors cannot simply be added together.[4]

Bagged or bagless: how dust is separated

Collected dirt ends up in either a dust bag or a plastic bin. Bins can be emptied and reused, which many people prefer for convenience. Bags can keep dust more contained when you throw them away. Choose based on how you would rather deal with the dust and whether anyone in the home is sensitive to it.[1]

Cyclonic separation uses a fast spinning airflow to throw heavier particles against the wall of a chamber, where they drop out of the air. It is the core technology in many bagless vacuums, and it helps prevent filter clogging and keeps suction steadier. Smaller particles are removed less efficiently than larger ones, so cyclones do not replace a good filter.[2]

Some designs use several small cyclones in parallel instead of one large one. These remove more dust, but they also create a higher pressure drop and need more energy to clean the same amount of air. On a battery-powered machine, that trade-off can show up in runtime or in how the machine behaves on its stronger settings, so it is worth checking how a maker describes its cyclone design.[2]

Filtration: what the claims mean

A true HEPA filter must capture at least 99.95% (ISO and European standard) or 99.97% (ASME and U.S. DOE) of particles 0.3 micrometres across, and its efficiency rises for particles both smaller and larger. The two standards differ slightly, so check which one a maker refers to. Vague wording such as 'HEPA-type' is not a standard, so look for the actual standard and efficiency figure.[3]

Filters do not do everything. A HEPA filter does not remove gases or odours. If pet or cooking smells bother you, look for an activated carbon stage as well. A pre-filter that catches larger dust, hair and pollen can extend the life of a HEPA filter, so ask how easy each filter is to reach, wash or replace.[3]

Filtration is only useful if the machine is sealed well enough to push air through the filter. Where the listing says nothing about the whole-machine design, treat a filter claim as a partial answer.[3]

Runtime, weight and bin size: compare, don't assume

The reference material used here gives no reliable typical figures for runtime, weight or bin capacity, so this guide does not invent any. Compare these specs directly between models and ask what conditions each figure applies to.[1]

For runtime, check the minutes quoted for each power mode, not just the longest figure. A maker's best number often applies to the lowest setting. Suction relates to power consumption, so stronger modes should drain a battery faster. Estimate how many minutes you need to clean your home on the setting you would use, and add a margin. Check whether the battery can be swapped.[4]

For weight, look for the figure in kilograms with the battery and floor head attached, because you carry and push the whole assembly. For bin size, compare capacity in litres, and consider how often you will stop to empty it. A small bin is fine for a flat but a nuisance in a large house. Also check how the bin empties, since a hygienic release matters for sensitive users.[1]

Match the machine to your floors

Because vacuums combine suction with agitation, the floor head matters as much as the motor. A brush that loosens debris helps on carpet, while hard floors need a head that keeps dirt moving into the airflow without scattering it. Look for a way to switch off or adjust agitation if you have both floor types.[1]

For carpets, a higher water lift helps with deep-down dirt. For delicate surfaces such as curtains, too much suction can be a problem, which is why some machines include a way to reduce it. Adjustable suction is a useful feature if you want to use one machine across the whole home.[4]

Quick checklist

Questions

Is a higher wattage always a stronger cordless vacuum?

No. Motor input power in watts is not the same as suction power. Airwatts combine airflow, water lift and power consumption, so they say more about cleaning ability.[4]

Does a HEPA filter remove odours?

No. HEPA filters trap very fine particles but not gases or odour molecules. For smells, look for an activated carbon filter in addition to HEPA.[3]

Why does a bagless cordless vacuum use cyclones?

Cyclonic separation spins the airflow so heavier particles drop out of it before reaching the filter. This helps prevent filter clogging and keeps suction steadier. Finer particles are removed less efficiently, so a good filter is still needed.[2]

What runtime should I look for?

No figure can be given here. Work out how many minutes your home takes to clean and compare that with the minutes quoted for the power mode you will use. Stronger modes use more power, so expect shorter runs.[4]

References

  1. Vacuum cleaner (Wikipedia, CC BY-SA 4.0), retrieved 2026-11-11
  2. Cyclonic separation (Wikipedia, CC BY-SA 4.0), retrieved 2026-11-11
  3. HEPA (Wikipedia, CC BY-SA 4.0), retrieved 2026-11-11
  4. Central vacuum cleaner (Wikipedia, CC BY-SA 4.0), retrieved 2026-11-11