Shark Clean & Empty Cordless Vacuum Cleaner with Auto-Empty
265/4564£199.99
- Our Lowest Price
Check stock
Check stock to see your delivery and collection options:
Sign in or register to save items to your account. Simply tap the heart again to remove.
About this product
Meet the cordless vacuum that empties itself, so you don't have to. After every clean, Shark Clean & Empty automatically deposits the dirt into a completely sealed base that holds dirt and debris for up to 30 days – so you can forget about emptying for weeks at a time. No more manual emptying after every clean. Enjoy powerful cleaning results on carpets and hard floors with an auto-adjusting brush-roll. Easily detach the handheld vacuum to clean anywhere with the included Crevice and Pet Tools.
Auto-Empty System automatically empties the vacuum into a large bagless base after every clean.
Fine dust particles are sealed away inside the base.
Auto-adjusts brush-roll for carpets and hard floors.
LED headlights on the floorhead illuminate hidden debris around your home.
Floor suitability:
- Suitable for carpets and rugs.
- Suitable for deep pile carpet and rugs.
- Suitable for wool carpet.
- Suitable for hard floors.
- Suitable for laminate flooring.
- Suitable for upholstery.
- Suitable for stairs.
Vacuum cleaner features:
- Weight 2.65kg.
- Size H110.8, W26.4, D35.6cm.
- Charge time: 5 hours to fully charge.
- Running time from 1 minutes to 40 mins, depending on the setting used.
- Low battery indicator.
- Number of batteries in pack: 1.
- Detachable handheld included.
- Comes with a docking station.
- Power boost - clean with increased power.
- Washable filter - wash regularly to maintain suction.
- Motorised floor head - drives bristles in to carpet to remove ground in dirt.
- Includes crevice nozzle, .
- 21.6 volts.
- Noise level: 84dB.
Handheld vacuum cleaner features:
- 21.6 volts.
- 40 mins running time on full charge.
- Charging time: 300 minutes.
- Low battery indicator.
- Variable power.
- Total capacity 1.3 litres.
- Crevice Tool, 20cm Multi Surface Tool.
- Size H110.8, W26.4, D35.6cm.
- Weight 2.65kg.
General information:
- Model number: BU3521UK.
- Manufacturer's 5 year (2 year on batteries) guarantee.
- EAN: 0622356297622.
4.3
287 reviews
84%
Recommended this product
Customers Say
The Shark Cordless Vacuum has received mixed reviews, praised for its lightweight design and self-emptying feature, but criticized for poor suction, frequent blockages, and short battery life.
An AI generated summary based on recent customer reviews
Each review is verified as authentic by our independent third party and we only publish reviews from customers or Argos Testers who have purchased or used the item. Customers are incentivised to submit product reviews as part of a prize draw.
Absolutely brilliant
This is our 2nd one. We now have 1 upstairs one down they are absolutely brilliant and so handy with the empty and charge feature.
null, 35 - 44, Cirencester
Expensive ornament
I bought this thinking it would make things around the house much easier. It blocks after about 5 minutes. I have spent more time troubleshooting and clearing everything out, taking it apart to empty it and putting it back together rather than vacuuming. Tried to get support help from Shark with no joy. Incredibly frustrating and disappointing. It is now an ornament in the corner of the room
Moi71, 55 - 64, Scotland
Disappointed.
I never leave reviews but this hoover is driving me mad! Had this for about a year now, I have tiled & carpeted flooring. So the switch modes on this and self empty seemed to be a great choice to go with especially with a busy lifestyle. Initially, the first 3-5 weeks, it was ok, but the little cone inside gets clogged up quickly meaning, you have to wash & clean this every other week if not weekly, to get the Hoover to actually suck up, without getting clogged, then there’s a little magnetic flap under the handle which also collects debris, and this flap just falls open and allows what is inside to fall on the floor once you’ve hoovered up which is extremely annoying! It’s also not anti hair wrap. I have long hair, so does my 3 year old daughter & obviously we naturally shed. This gets stuck around the barrel (head of the hoover) and I have to cut it off weekly. Also have to empty it and clean the head & filter weekly to ensure it actually sucks up. It doesn’t actually get up into the corners of rooms, in the kitchen or dining area, or right up against furniture, you have to get the dirt out with a brush or your finger & then hoover it. Which is just ridiculous. Recently I’ve noticed it blowing bits out the back also which just defeats the object of hoovering up! The suction is ok, but doesn’t get all the little socks bits off carpet, you have to keep going over and over it, it’s definitely better on hard flooring. My first shark Hoover, I moved over from a Gtech after hearing friends saying how good they are but they had plug ins not wireless so I took a chance on this. However, my opinion is quite different, my Gtech lasted 5 years and I never had to faf around with it as much as this, therefore, I probably wouldn’t recommend it if you have carpet or rugs, or any length of hair that can get wrapped around the barrel & you don’t mind having to take it apart to clean different parts at least once a week. And most certainly wouldn’t recommend it for pet hair with the little cone filter. Handheld, the nozzle that comes with it also doesn’t allow you to hoover down the cracks in your car, it’s too thick and wide. And the pipe is long, therefore difficult to manoeuvre. + Although, the charge allowed me to hoover my 3 bed house but doesn’t suck up to get all the bits on the carpet upstairs especially when you’ve already done downstairs. It is lightweight. Much lighter than my old Gtech. It would work great as a second hoover to just collect a few bits every now and then but it’s too expensive to buy just for that. Also, I have arthritis in my thumb and really struggle to take it apart to use as a handheld so wouldn’t be great for the older generation! My nan is 80, great for her age & couldn’t do it, my mum 56 and she couldn’t do it. It’s very stiff and hasn’t got easier with use over 12months. Upon emptying into its back, when you put it on its dock, it’s extremely loud, scares you every-time for the first few weeks! Always had it on high suction, low is just pointless. I’m quite disappointed with it as my dad brought it for my birthday last Feb 2025. Sorry Shark, but it doesn’t quite do what it says on the tin! Definitely won’t purchase another after having this.
Ali19, 35 - 44, Midlands
A star
This is the best cordles I have ever used, Before i was using different brand it has good suction but too heavy to use with shark same sunction and less weight. It helps a lot
Mary, 45 - 54, Luton
Great product
Absolutely brilliant my carpet was tired but this hoover has made it fresh and clean again the suction is great it's easy to use and empties itself the instructions where eay to understand all in all great product
Freckles, 45 - 54
Disappointed... initial good impression soon faded
Disappointed...For the first few months the shark was ok, but it has now started dropping dust from the emptying flap as it doesn't reseal itself. It also blocks up very frequently and has trouble self emptying.once the cone filter is covered its performance is impaired. We actually have a cleaner who brings her industrial vacuum so this is only used between visits..so it is not subject to heavy demand. We replaced a Dyson V6 with the shark, as we got fed up with the 'preset' battery life but never had any criticism of the vacuum performance. Regret we cannot recommend as the initial impression was good.
GCP Gloucester, 65 or over, Gloucester
Great product
So light and easy to use
Glen 6125, 65 or over, Devon
Not good
Not very good keeps blocking up and little flap keeps coming open and letting dust go on floor
Keith4013, 55 - 64
happy
Brilliant couldn’t be happier the suction is great and empty after use function is amazing
Mandy
Hoover
I am delighted with my purchase of the shark cordless vacuum it is so light that it can be used either up or down stairs.It has good suction and is so easy to empty.
Easy, 65 or over, Brechin
The brushroll will not switch on on its own while the vacuum is in the upright position. The brushroll will only activate when you place your foot on the nozzle to disengage the lock.
Yes, the Shark BU3521UK comes with a 8" Duster Crevice Tool and a Pet Multi Tool which can be used to clean in small or tight areas.
The brush bar cannot be switched off entirely. We recommend testing the vacuum on an isolated area to prevent damaging sensitive fabrics.
The brush bar cannot be switched off entirely. We recommend testing the vacuum on an isolated area to prevent damaging sensitive fabrics.
The unit's base will include its own cable, which you will connect directly to the wall socket.
Inside the box of the Shark Cordless Stick Vacuum with Auto Empty System BU3521UK, you will discover an 8" Duster Crevice Tool.
This unit provides three flexible charging options. It can be charged by positioning the unit on the dock, inserting the charger into the port situated below the handle of the handheld vacuum, or directly charging the battery once it has been removed from the handheld.
Using a bag inside the Auto-Empty base is not advisable, as it could interfere with the proper extraction of dust and debris from the Handvac dust cup into the sealed base of the Auto-Empty dock following every clean.
It is important to note that this model is equipped with a power cord, which means it does not come with removable batteries.
The cord to charge the base of this vacuum is 1.2 meters and can be plugged into any UK standard socket.
The small print
*Prices correct as displayed but are subject to change.
We have never charged less than £199.99 for this product
The customer and brand answers you’ll see above are submitted independently. As we don’t review these answers, we can’t take responsibility for anything they may say. The responses from Argos colleagues are accurate at the time of publishing. For the latest info, you should check the product page.