- Buying Guide
Buying a cordless vacuum: what really matters
Suction power, battery life, weight: which specifications are actually meaningful – and which say little in practice.
See us more on GoogleKey takeaways
- Stated runtimes almost always apply to the lowest setting – at full suction power, only eight to ten minutes often remain.
- A replaceable battery significantly extends the lifespan of the device, provided the manufacturer offers it separately.
- The weight in your hand matters more than the total weight: stick vacuums are heavy at the top, which causes fatigue when vacuuming overhead.
Cordless vacuums have replaced canister vacuums in many households – not because they are more thorough, but because they are quicker to grab. If you don't have to unroll a cable first, you'll vacuum in between. And that's exactly where the criteria that matter when buying come from: they depend less on pure suction power than on handling, stamina, and maintenance effort.
The most important key figures
8–10 min
realistic runtime on the highest setting
2,5–3,5 kg
typical weight of a stick vacuum
0,3–0,8 l
capacity of the dust container
3–5 h
Typical charging time without fast charging function
How to read the specifications correctly
Two values dominate the product pages: suction power and battery life. Both are only comparable to a limited extent. Suction power is sometimes given in pascals, sometimes in air watts, measured partly at the motor, partly at the nozzle – so figures from different manufacturers cannot be compared directly. And the runtime refers to the most economical level without the electric brush; as soon as the brush roller is running, it drops significantly.
Five points that matter in everyday life
Replaceable battery
If the battery is replaceable and available separately, the device can continue to be used after three to four years instead of being replaced. Permanently installed batteries determine the lifespan of the entire vacuum.
Weight distribution
What matters is not the total weight, but where it sits. In stick vacuums, the motor and battery are at the top of the handle – comfortable on the floor, strenuous when vacuuming curtains or ceilings.
Detachable brush roller
Hair inevitably gets tangled around it. If the roller can be removed without tools, it's a matter of two minutes; if it's screwed in, cleaning is usually skipped.
Dust bin size and emptying
Small bins need to be emptied after every pass. More importantly, a flap that opens over the trash can prevents the cloud of dust when emptying.
Filter concept
Multi-stage, washable filters trap fine dust and can be used again and again. It is important that they can dry completely after washing.
Stick vacuum or handheld?
Both designs share the same battery, but differ in their intended use. For the whole apartment, you need reach and runtime; for the car and kitchen counter, maneuverability is more important. Many devices can be converted – whether that is actually used in everyday life depends on how quickly the conversion works.
Two designs compared
| Stick vacuum | Handheld |
|---|---|
| For the entire living space | For cars, upholstery, and quick crumbs |
| Longer runtime, larger container | Short sessions, small container |
| Electric brush roll for carpet | Mostly just a suction nozzle without a motor |
| Needs a wall mount | Fits in a drawer |
Frequently asked questions
How long does the battery of a cordless vacuum last?
The cells lose some capacity with each charging cycle. After about three to four years of regular use, the runtime is noticeably shorter. Devices with a replaceable battery can then continue to be used for a fraction of the new price.
Is a cordless vacuum sufficient as the only vacuum in the household?
In apartments up to about 80 square meters, generally yes, provided the runtime is sufficient for a single pass. For larger areas, lots of carpet, or pet hair, a second battery is more sensible than an additional device.
What do the Pascal specifications for suction power mean?
Pascal describes the negative pressure generated by the motor. But the number says nothing about how much of it reaches the nozzle – that depends on air guidance, filter, and brush. Values from different manufacturers are therefore not comparable.
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About the author
Home & garden editor
Miriam looks after the home and garden guides at cybermag – from robot vacuums and washing machines to lawn mowers. She is less interested in spec sheets than in what still works after two years of everyday use.
Facts checked and approved for publication by Miriam Kohl · as of August 27, 2026 · How our texts are written →