Shark Clean & Empty Cordless Stick Vacuum (BU3521INT) | Auto-Empty Dock
Powerful cordless cleaning, without the mess.
Meet Shark Clean & Empty, a lightweight cordless stick vacuum that auto-empties after every clean into a sealed, bagless base- so you can skip manual emptying. HyperVelocity suction handles dust, debris and pet hair across floor types, while Anti-Hair Wrap helps prevent tangles for smoother cleaning. A sealed HEPA system captures 99.9%* of dust and allergens, and the auto-charging dock ensures your vacuum is aways ready to go
- HEPA Filtration and 500X less dust exposure: Auto-Empty Dock and HEPA filtration captures 99.9%* of dust & allergens, helping reduce airborne dust clouds.
- Based on ASTMF1977, down to .3 microns. ‡Based on third party-plume testing while emptying vs. manual empty.
- Auto-Empty + Auto-Charge Dock: The sealed bagless 1.3L Auto-Empty Base empties after every clean and charges while stored, so you can forget manual emptying for up to 30 days and pick it up ready to go.
- Strong pickup on every floors: 240W HyperVelocity suction picks dust, debris and pet hair across multiple floor types.
- Anti-Hair Wrap Technology: Self-cleaning brush-roll helps prevent hair from wrapping.
- Smart Floor Detection: Automatically adjusts brush-roll speed between carpets and hard floors to ensure strong pickup where needed with gentler performance on delicate floors.
- Lightweight, less strain: 30% lighter design makes it easier to clean longer without tiring out.
- Quick cleans anywhere: Detachable handheld design for stairs, cars and tight spaces.
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Product details
- 1 Unit Handheld Vacuum
- 1 Unit Motorised Floor Nozzle
- 1 Unit Wand
- 1 Unit Duster Crevice Tool
- 1 Unit Pet Multi-tool
- 1 Unit Auto Empty Dock
- 1 Unit User Manual
FAQs
The vacuum can run up to 40 minutes in ECO or AUTO mode depending on the surface and suction level. In BOOST mode, runtime is shorter (around 11 minutes) for deep cleaning.
The BU3521 uses a removable 2350 mAh lithium-ion rechargeable battery that provides consistent power for cordless cleaning. Lithium-ion batteries are designed for reliable performance and work best when charged regularly and allowed to discharge gradually during normal use.
Yes. The vacuum works effectively on hard floors, tiles, and carpets, and suction adjusts automatically in AUTO mode for optimal cleaning.
The vacuum includes three cleaning modes:
• ECO Mode: Longer runtime for everyday cleaning
• AUTO Mode: Automatically adjusts suction based on floor type
• BOOST Mode: Maximum suction for stubborn dirt and deep cleaning
Yes. When placed on the Auto-Empty Dock, the vacuum automatically transfers dust and debris into a larger disposable bin, reducing the need for frequent manual emptying. The dock can hold debris for up to about 30 days with 1.3 liters, depending on household usage.