

🧼 Clean smarter, not harder — the future of cordless vacuuming is here!
The Shark Clean & Empty Cordless Stick Vacuum BU3521 revolutionizes home cleaning with its 1.3L auto-empty base that automatically seals away dust after every use, reducing dust exposure by up to 500x. Weighing 30% less than previous models, it offers up to 40 minutes of runtime powered by a rechargeable lithium-ion battery. Its HEPA filtration system traps 99.97% of allergens, while the auto-adjusting brushroll optimizes suction across carpets and hard floors. Designed for pet owners and busy professionals, it transforms into a handheld vacuum and includes specialized tools for pet hair and crevice cleaning, making it the ultimate cordless cleaning solution for modern homes.













| ASIN | B0D15YWYMD |
| Amperage | 25 Amps |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Batteries required | Yes |
| Battery Description | Lithium-Ion |
| Battery Life | 40 minutes |
| Battery type | Lithium-Ion |
| Best Sellers Rank | #23,656 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #80 in Stick Vacuums & Electric Brooms |
| Brand | Shark |
| Capacity | 1.3 Liters |
| Charging Time | 5 Hours |
| Color | White |
| Control Method | Touch |
| Controller Type | Push Button |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,689) |
| Filter Type | HEPA Filter |
| Finish Type | Polished |
| Finish types | Polished |
| Form Factor | Handheld, Stick |
| Global Trade Identification Number | 10622356647462 |
| Included Components | Auto-Empty Base, Cordless Vacuum, Crevice Tool, Pet Multi-Tool |
| Indoor/Outdoor Usage | Indoor |
| Is Cordless? | Yes |
| Item Weight | 11.24 pounds |
| Item model number | BU3521 |
| Manufacture Year | 2024 |
| Manufacturer | SharkNinja |
| Maximum Horsepower | 0.32 Horsepower |
| Model Name | Clean & Empty |
| Motor Horsepower | 0.32 horsepower |
| Number of Items | 1 |
| Number of Power Levels | 3 |
| Number of Speeds | 3 |
| Portable | Yes |
| Product Dimensions | 14.69"L x 10.43"W x 43.5"H |
| Recommended Uses For Product | Carpet, Floor |
| Special Feature | Cordless, HEPA, High Precision Sensors, Lightweight, Spotless Cleaning |
| Style | Clean & Empty (Basic) |
| UPC | 622356647465 622356309783 |
| Vacuum Collection Technology | Rotating Brush Roll, Auto-Empty System |
| Wattage | 180 watts |
C**A
Fantastic at sucking up pet hair from carpets!
I've had this vacuum 3 months now and I'm really impressed. I've had Shark vacuums for years now and I usually get their pet, upright vacuums. When my last one died I was looking for similar and wasn't finding a "pet" one at the time, but this kept popping up and seemed the closest. I really was not sold on the auto-emptying station and thought that was unnecessary...but after 3 months of daily use, I love it. Is it needed? No. But does it make life a little easier - yup! I was the worst about finishing up vacuuming and not emptying the vacuum and having to empty it mid vacuum the next time, but this handles that problem and I really love that about it. I do have to remember to empty the bin on the base, but I usually remember before it's too full (usually, not always). I bought an extra set of filters for the vacuum and base and find that so far they need to be swapped out/cleaned about every 1.5 months (as i'm coming up to my next swap out). As for the way it works on pet hair - AMAZING! In our household we have 3 long hair cats, 2 golden retrievers and a goldendoodle that sheds worse than both goldens combined. It's the best vacuum for pet hair i've tried yet. I was really shocked that it got the dog hair off the carpet and backdoor rug that does not like to give up the hair no matter what i've tried. I use to vacuum my living area rug and then take one of those pet hair rakes to it to get the hair off, but this vacuum picks up all the visible hair so I haven't even felt the need to do the pet rake. It has 3 modes and I find I use the eco mode the most. The mid-range mode has so much suction it sucks up my smaller area rugs and the rollers stop working, so I just use eco mode on those and they are low/no pile so it works really well. When I get to the living room area rug it's considered a low pile (but plush) and I use the mid-range mode that auto speeds up the brush, and it picks up the pet hair great. On my backdoor mat that is one of those heavy duty get-the-water-and-mud-off rugs from HD, I use mode 3 and that gets it all off in a few swipes. Things I wish they would change on future models: I wish it just started on eco mode and not the mid-range mode. Or at the very least started where you left off the last use. I wish there was a way to boost the suction while on eco mode like my last Shark did. That little trigger boost was really handy. Battery life is good. Suction is great. It's just really a fantastic vacuum and i'm very happy with my purchase and will hopefully have it for many years like my pervious Sharks.
T**A
Love this cordless vacuum
Absolutely love this cordless vacuum. Works well, but the best feature is the automatic empty tray. So easy to use and easy to cleans. It’s a great size not to heavy, easy to swap to handheld and picks up dirt great.
T**Y
All in all great vacuum!!
This vacuum works really well and motivates me to clean my hardwood floors more often. I’ll start by saying this vacuum was such a welcome surprise to my previous one. I bought this to replace an all in one mop vacuum combo from another brand that really delivered poor performance so this one totally outshined the competition. 1) it’s really powerful. I can vacuum multiple times in the same day and it will still collect stuff and it’s chamber that will impress you to see how clean it’s keeping your floors. 2) great battery life. I absolutely love that. I can just keep it on. It’s charging stand, which means that I can pick it up anytime quickly and easily and I know it’s going to be charged and ready to go. When I’m done, I just put it back on its charger. 3) the self cleaning function!! I wasn’t looking for a vacuum with the self cleaning function so that was just an added bonus. I really didn’t think I would care about it, but it is SO NICE TO HAVE. Having a vacuum with a self cleaning function that empties the dust bin for you means that anytime you want to vacuum you simply pick it up off the charger and when you’re done? You simply put it back on the charger, that’s it! It makes it so quick and easy to vacuum (and bonus it’s pretty fun to watch) which means I vacuum more frequently and actually look forward to doing it! 4) the roller brush doesn’t trap hair, thank GOD. I truly despise dealing with hair that isn’t on my head it just grosses me out. I also have 3 pets so not having to deal with cutting hair out of a brush after vacuuming is a literal godsend. 5) pivots from hardwood floors to rug easily. It has an auto detect feature that will automatically increase the suction power when on a rug, which is really nice. 6) the buttons for the attachments feel really nice to click on and off. You know when you have a cheaper product and you feel like you’re almost going to break it to click something or push a button? This is easy to put on and take off attachments and feels like it’s nicely made. And it was a big plus for me that it has a handheld feature that can be removed for vacuuming things like the couch or car. 7) it has three suction power modes; Eco regular and a turbo mode, which gives you more control on battery life if you need it to last a little bit longer but don’t need quite as much suction power. My space is only about 1200 ft.² so I’ve had no issue with battery life. Some constructive feedback I would like to include: 1) it would be nice if it could stand up on its own 2) it can’t lay totally flat, though it can go pretty low and get a little ways underneath the bed 3) Lastly, Shark, can we talk about the aesthetic of this thing? I’m not going say that us women are the only ones vacuuming out here but a lot of women are going to be buying this product and we do not want a vacuum that looks like a drill handle 😂 I was honestly very put off by the way this looks when I first saw it, but the functionality of it made it worth it. I would LOVE to see a nicer looking handle for the future.
M**N
Great for Pet Hair With a Few Quirks
I really like the Shark Clean & Empty Cordless Stick Vacuum overall. The suction is strong, it’s lightweight, and the hands-free empty feature is super convenient especially for quick cleanups. It does a great job picking up everyday messes. That said, I do wish the battery life were a bit longer, especially when cleaning multiple rooms in one go. Also, with dog hair, the hands-free empty can occasionally get jammed and needs a little extra help. Even with those minor issues, it’s still a solid vacuum and has made keeping up with pet hair much easier. I’d definitely recommend it, especially for daily use and quick cleanups!
D**E
Amazing vacuum. Love it
This vacuum is a life changer! I had a vacuum with a cord before. I vacuum so much more now that I don’t have to plug in. The bristle-less spinner thingy on the roller inside is a game changer. I used to have to open up my vacuum and remove all the hair that winds up in the spinning wheel but no hair gets stuck around this design. Love it so much. Also the battery length is super sufficient. I have a 3,000 sq ft house and I can vacuum the whole upstairs and downstairs with one charge. It’s a mix of carpet and hard floors. Also, the vacuum actually works seemlessly between the rugs, carpets, and hard floors. Suction is great. Again, love this vacuum. Bought one for my 65 yr old Dad as well. Will buy one for my Mom next.
G**A
Es muy práctica al poder cambiar el tamaño al intercambiar los módulos. Bastante potente. Muy recomendable.
S**.
Amazing same as description.Work perfect very light but same time very strong
D**L
Good Vacuum, but could be improved. The vacuum does a good job of cleaning, picking up tiny dust, hair, etc. It works as intended. The emptying into a large canister is nice and generally works well. Where it can be improved... 1) The flap where the dirt empties into the large canister sometimes remains open after emptying. When this happens, as you vacuum and didn't notice some dirt spills out as you're cleaning. So, you have to ensure it's closed before you start vacuuming everytime. 2) The 2 connection parts that disassemble to convert to handheld don't come apart or put back together smoothly. It requires a bit of jiggling to get the parts in and out. 3) The large collecting bin traps hair and dust into one part of the bin, so you end up having to use your hand or a stick to empty, which defeats the whole point of not getting your hands dirty when emptying. Overall, it's a decent vacuum, but for the price, I would have expected it to be built a bit better.
J**A
As a user of proper vacuum cleaners I was skeptical about cordless vacuum cleaners. Unfortunately my experience proved true. As soon as I got it I tried to vacuum a strand of hair and wouldn’t come. I felt like I am holding a fan not a vacuum. I tried vacuuming the tiles, I had to go over the piece of crumble four times to pick it up. Then I tried to vacuum my carpet, the vacuum showed red light and shut off and the battery which was full became zero. This is a toy not a vacuum.
C**H
This vacuum is not intended for anything other than hard floors. The brush head does not pick up pet hair from carpet, low or high pile. The “pet brush head” doesn’t pick up pet hair either. We’ve struggled with it and now are passed the return window and are stuck with it. It’s for sale for a really good price but I can’t offer warranty or returns.
Trustpilot
2 weeks ago
1 month ago