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Except, in fact, you can: the Vax ONEPWR Blade 5 Dual Pet & Car comes with all the attachments you might need and a second battery. While those batteries don’t last as long as the Bosch’s, its soft roller helped it perform better in our all-round cleaning tests. On carpet, a little more was left behind. I measured 96% of the spill collected, though a visible dusting remained after the first pass. I found it was best to employ the upholstery brush, as the velvety bristles had just enough agitation to gather the remnants from our short pile carpet. We assess the cleaning performance of each vacuum cleaner, compare it to the competition, and then rate it. The Bosch has two power levels, normal and Turbo. To summarise, let’s call these settings ‘poor’ and ‘properly effective’ respectively. Bosch Unlimited 8’s noise level is measured between 67 and 71 dB, which is tolerable, and I could still have a conversation with my wife while vacuuming without raising my voice. This volume is quieter than many of its premium cordless competitors, including the Dyson V15, which produces 71 to 76 dB of noise. Display Screen
The extension wand has a hinge about two-thirds of the way up that can be released to allow it to bend up to 90 degrees. This is particularly useful for getting under low furniture. The long, bendy crevice tool is also handy for getting into narrow spaces behind wardrobes and radiators. It’s not unique to Bosch, but there aren’t many models that come with one of these as standard. The brush is 25 cm (9.8 inches) wide, and its roller has a width of 21 cm (8.3 inches). That size is entirely sufficient for cleaning. We even reached the corners and got under most of our furniture. It’s the same with the turbo button. To switch to turbo mode, you have to press the button on the top to activate the mode. You won’t have to hold that button, either. That’s quite convenient when cleaning. Power for All Nearly an hour and a half is the longest battery life I’ve seen so far. The Bosch Unlimited 8 comes with two interchangeable batteries, meaning you have almost three hours in total to vacuum! The Dyson V15’s battery is also removable and replaceable, so you can double its run time by purchasing extra batteries. While being cordless and having a direct floorhead is undoubtedly the ideal scenario for stair cleaning, we again missed having a small turbo tool for these duties. The main floorhead is a little unwieldy and a small tool would have also allowed us to clean the carpeted step verticals.
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The two batteries supplied with this model are remarkably compact and light for their capacity. For comparison, a lot of budget cordless cleaners come with 1.5Ah or 2Ah batteries that are larger and heavier. The solid capacity promises a whole lot of run time from the cleaner, with the ability to swap out batteries and charge while you are cleaning. Things change when Turbo is engaged but the Bosch still isn’t great. It’s more powerful this time than the Beldray but lags behind the Dyson, Xiaomi and Shark vacuums. Another unique feature of the design is the exchangeable battery of the Bosch Unlimited Pro Power. You can remove the battery at the push of a button and insert a new one. Bosch was one of the first manufacturers in the UK to implement this, and many have followed suit. The High Power brush has great "gliding properties", which also contribute to the cordless vacuum’s smooth movement.
Joe, our wireless vacuum expert on the Smart Home Fox team, has spent over half a decade meticulously testing every model that has landed with us. On the downside, it has few of the features that are slowly becoming absolute essentials on a cordless vacuum. While I could live with the clunky emptying (and actually, I’m slightly taken by it), I would find it hard to introduce a vacuum into my household that doesn’t comb hair tangles out of its floor head. The Bosch Unlimited has two cleaning modes – standard and “Turbo” – which you can toggle between by pressing a button on top of the vacuum’s pistol-grip handle. While the standard mode will get you plenty of battery life, it isn’t particularly effective, producing only 4.5kPa of suction. The runtime of the BBS1U224 from the 8 series is about 40 minutes, which is also quite short. There are many devices with a longer battery life these days.The Unlimited BCS122GB is the top-spec model of the series and comes with a solid, if not fully comprehensive, list of toys. There’s a small LED light on the top that lights up when charging or when vacuuming. Then you can see what the battery status is. For one thing, you have to disassemble the device entirely whenever you want to empty the container because the individual parts are arranged that way. We would have expected a better system from the traditional company. You can simply remove the brush and cut off the hair with small scissors or a sharp knife to prevent this.
As popularised by the eponymous Dyson, this Bosch is also bagless but it only has a capacity of 0.4l so you’ll have to empty it out pretty frequently. It’s smaller than the Dyson V8’s 0.54l bin, although on balance there’s not enough in it to make a significant difference to the way you’ll use the vacuum. When it comes to suction, the Unlimited 7 proved to be a bit of a lightweight in our tests. A good vacuum cleaner isn’t only about the suction, but power in this regard certainly helps. On its most powerful setting, the vacuum only measured 11kPa. As you can see from our chart below, that’s only just over one-third of what a Dyson V15 Detect can manage (before it cuts out), and its similarly priced rivals are all more powerful even in low-power mode. The Dyson V15 wins 2-1 and draws once against the Bosch Unlimited 8. The Dyson V15 passed all of my tests with excellent results, is lightweight, isn’t too noisy, and comes with various attachments. The Bosch Unlimited 8 is also a good choice, but it is a bit heavy, has a small dust cup, and isn’t ideal for deep cleaning carpets. Cleaning PerformanceThe head’s superb articulation allows it to turn into all but the tightest of turning steps, although it remains too large to flip up and do the verticals. For those, we used the triangular upholstery tool, which was effective if not swift.
When emptying the dirt container, it’s crucial that you can carry the dirt from the device to the dustbin as easily and as cleanly as possible. Every manufacturer has its own system. Some work well, and others don’t. The only disadvantage was that it pushed coarse dirt in front of the brush sometimes. That’s probably because the suction power is too strong for the brush’s narrow slot. All in all, the BOSCH Unlimited Pro Power BSS81POW1 cordless vacuum impressed with its extremely powerful suction in the cleaning tests.Clip-on tools include a 2-in-1 furniture nozzle with pull-down dusting brush and a bonkers long and very flexible crevice tool. That is ideal for getting down behind radiators, but takes some wielding to accurately pinpoint spots of dust. A good-length metal tube optionally extends reach for all tools. Clips and fittings between tools and tubes are top-notch. On normal power mode with no tools, this cleaner barely registered 65dB of noise output. That is much quieter than most of its premium cordless competitors and the sound is an inoffensive drone – as opposed to the dentist-drill sound of some.
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