• Shark Clean & Empty Stick Vacuum BU3521

    $517
    $232.99 (31%) off RRP of $750
    $232.99 (31%) off RRP of $750

    Shark Clean & Empty Stick Vacuum BU3521

    $517
    $232.99 (31%) off RRP of $750
    $232.99 (31%) off RRP of $750
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    • Overview
    • Specifications & manuals
    • Reviews
    • Legendary service
    • Delivery, services & returns
    • Questions & answers

    Overview

    The Shark Clean & Empty Cordless Stick Vacuum BU3521 delivers effortless cleaning with its ultra-lightweight design, powerful suction, and hands-free auto-emptying system. Designed for convenience, it automatically empties dust and debris into its 1.3L base while charging, ensuring it’s always ready for the next clean. Experience HyperVelocity suction power, designed to tackle dirt on both carpets and hard floors. The Auto-Adjusting MultiSurface brushroll optimizes speed for deep carpet cleaning while engaging directly with hard floors for a thorough clean. With up to 40 minutes of runtime, you can deep clean your home without interruptions. The vacuum easily transforms into a handheld cleaner, making it perfect for above-floor surfaces, upholstery, and tight spaces. HEPA filtration with Anti-Allergen Complete Seal captures and traps 99.97% of dust and allergens, ideal for allergy sufferers. LED headlights illuminate hidden debris, and Quiet Mode allows silent charging, so you can empty the bin at your convenience.
    Auto-Empty & Always Charged

    The 1.3L auto-empty base eliminates manual emptying by automatically collecting debris while the vacuum charges. Always ready for the next use, it provides a hassle-free cleaning experience with no interruptions or messy bin handling.

    HyperVelocity Suction Power

    Designed for deep cleaning, HyperVelocity suction delivers powerful airflow to lift dirt, dust, and pet hair from carpets and hard floors. Enjoy superior debris pickup with consistent, high-speed suction for a thorough and effortless clean every time.

    Transforms into a Handheld Vacuum

    Quickly converts into a lightweight handheld vacuum for effortless cleaning of stairs, upholstery, and tight spaces. Perfect for above-floor surfaces and car interiors, it provides versatile, on-the-go cleaning without the bulk of a full-sized vacuum.

    HEPA Filtration & Anti-Allergen Complete Seal

    The HEPA filtration system, combined with an Anti-Allergen Complete Seal, captures and traps 99.97% of dust, dander, and allergens. This ensures cleaner air, reducing airborne irritants and creating a healthier home environment for allergy sufferers and pet owners alike.

    Specifications & manuals

    key Specifications
    Brand
    Shark
    Model Number
    BU3521
    Height (mm)
    1100 mm
    Width (mm)
    265 mm
    Depth (mm)
    140 mm
    Weight (kg)
    2.7 kg
    Finish Colour
    White
    Finish Colour Description
    White & Navy Finish
    Vacuum Type
    Stick
    Vacuum Bag Type
    Bagless
    Power (W)
    180 W
    Accessories included

    1x Shark®Clean & Empty
    1x 8” Duster Crevice Tool
    1x Pet Multi Tool
    1x Auto EmptyCharging Dock

    warranty
    Manufacturer Warranty
    2 Years
    Use
    Not intended or designed for commercial use.
    additional Dimensions
    Package Dimensions (H x W x D)
    715 x 355 x 257
    Package Weight (kg)
    5.46
    functions
    Pet Hair
    Tiles and Carpets
    Hard Floors
    other Features
    Features
    Auto-Empty & Always Charged: The 1.3L base automatically empties debris and charges the vacuum while docked, eliminating manual emptying and ensuring it's always ready for the next clean.

    Hyper Velocity Suction for Deep Cleaning: Advanced suction technology delivers powerful debris pickup on both carpets and hard floors, tackling dirt, dust, and pet hair with ease.

    Auto-Adjusting Multi Surface Brush roll: Automatically adapts brush speed to different floor types, providing deep cleaning for carpets while directly engaging hard floors for a thorough clean.

    Up to 40 Minutes of Runtime: Long-lasting battery power allows for uninterrupted whole-home cleaning, giving you more time to focus on what matters.

    Transforms into a Handheld Vacuum: Easily converts into a lightweight handheld vacuum, making it perfect for stairs, upholstery, car interiors, and above-floor surfaces.

    HEPA Filtration & Anti-Allergen Complete Seal: Traps 99.97% of dust and allergens, improving indoor air quality and making it an excellent choice for allergy sufferers.

    Quiet Mode for Discreet Operation: Enables silent docking and charging, allowing you to postpone emptying the dustbin without disrupting your home.

    LED Headlights for Spotless Cleaning: Bright LED lights on the nozzle illuminate hidden debris, ensuring no dust or dirt is left behind.
    electrical Connection
    Length of cord
    1.2 m
    country of Origin
    Origin
    China

    Reviews

    Rating snapshot

    5
    308
    4
    57
    3
    24
    2
    25
    1
    42

    Average customer rating

    Overall
    4.2
    Ease of setup
    5.0
    Build quality
    5.0

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    What customers say
    Generated by BazaarVoice HarmonyAI using customers reviews

    The cordless vacuum cleaner offers powerful suction and a lightweight, maneuverable design that makes cleaning easy. Customers find it to be an efficient and convenient option, particularly appreciating the cordless feature and ability to clean stairs and hard-to-reach areas. Some users report the battery life is not as long-lasting on carpets, and the vacuum can get stuck under furniture. Overall, the majority of reviewers are highly satisfied with the product's performance and quality.

    Pros
    Cons
    1-3 of 458 reviews
    Tigers842026-03-28
    Convenient, falls short of plug in's
    Really convenient and easy to use, the self emptying is great. Where this falls short is it's power and hair from carpet pick up, it never picks up my wife's hair from the bedroom carpet, I have to get the old plug in out which defeats the point of buying this. It's great for quick daily clean, hard floor and certain carpets but some carpets it fails to pick up hair. Plus the overall cleaning performance of this compare to a plug in, there's no comparison this is no way near.
    Schmal2026-03-28
    Sucks not in a good way
    This vacuum is horrible. It clogs, it just moves hair around. I change filters and empty but it doesn’t work well at all. I have hard floors, no carpet. I have to sweep with a broom first into piles so it will pick up dirt and pet hair. I have a lab and a cat. I have a rug at my front door, and it basically has to be picked up and shaken outside. Pet hair just gets pushed around not picked up. It clogs at the bend where the brush head goes into vacuum. I had to buy a brush to clean it. Now it won’t self empty! I dumped it and changed filters now it won’t work Had it for about a year and a half and it never worked. Piece of junk!
    Crawford19952025-10-18
    House work made easy!
    The Shark Cordless Clean & Empty Vacuum has completely transformed my cleaning routine. It’s lightweight, easy to maneuver, and powerful enough to handle both carpets and hard floors with ease. The cordless feature gives me total freedom to move around the house without constantly switching outlets. What really stands out is the “Clean & Empty” feature, emptying the dustbin is quick, mess-free, and hygienic. Battery life is solid, and it charges fairly quickly. Overall, it’s a fantastic, user-friendly vacuum that makes everyday cleaning fast and efficient. Highly recommended!

    Legendary service

    The Appliances Online Net Promoter Score (NPS) is based on feedback from 89,897 people, collected between August 2024 to August 2025. Learn more about the Net Promoter Score (NPS).
    Excellent work!
    Joseph, Edensor Park, NSW
    Could not ask for more
    Appliances Online Customer, Australia
    Very happy with Appliances Online
    Janice, Scarborough, QLD

    Delivery, services & returns

    Appliances Online is all about legendary service. We offer free next business day delivery, free connection, free removal and free recycling, and we even offer Saturday delivery and, in some locations, a Premium Delivery option that allows you to choose your own 2-hour delivery window.

    Questions & answers

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