✅ Features of Shark BU3521 Cordless Stick Vacuum

The product boasts automatic emptying and charging, returning to its dock after each cleaning session and automatically emptying collected debris into the base. This feature promises to eliminate manual emptying, thus avoiding dust clouds.

Maneuverability is enhanced with a design that is reportedly 30% lighter than the Shark Vertex Pro cordless vacuum. For added versatility, it also includes a removable handvac, allowing for convenient above-floor cleaning tasks.

In terms of runtime, the product offers up to 40 minutes of usage on a single charge when operated in ECO mode, as measured at the hand vacuum. Dust exposure is significantly reduced, with claims of up to 500 times less dust exposure during emptying compared to traditional methods, with fine particles sealed away.

HEPA filtration is incorporated to capture over 99.97% of dust and allergens, trapping particles down to 0.3 microns based on ASTMF1977 standards. To adapt to various surfaces, the vacuum features an auto-adjusting brushroll, optimizing speed for both deep carpet cleaning and direct hard floor engagement.

A quiet mode is available, enabling silent docking and charging by delaying the emptying process. Integrated LED headlights on the nozzle illuminate hidden debris for thorough cleaning.

Included accessories consist of an 8" Duster Crevice Tool, Pet-Multi tool, and a removable DC-Jack Battery Pack. Note that spare battery packs and charging cords are sold separately.

✅ What we like about Shark BU3521 Cordless Stick Vacuum

One of the standout features is how easy this vacuum is to clean. The self-cleaning function is effective, and emptying the dustbin is a breeze. It handles dust, dirt, hair, and even pet fur with ease. I also appreciate the automatic trash disposal to the dust bin when it returns to the charger.

The lightweight design makes it easy to maneuver, especially since there's no cord to drag. The powerful suction adjusts quickly from hard floors to rugs, providing an effective clean. The sturdy suction head also prevents hair from getting stuck, which is a major plus.

Functionality is another strong point. It's easy to use, works well on all floor types, and can even be used as a hand vacuum for furniture and those hard-to-reach spots. The auto-empty function works reliably, and the self-cleaning feature automatically adjusts the power as needed. It's also easy to use, turns smoothly, and is ready to go when you need it.

The cordless operation is incredibly convenient for quick cleanups, eliminating the hassle of dealing with a cord. It charges quickly, and the self-charging stand is a handy addition. I also found the automatic features, such as auto floor detection and the self-emptying bin, to be particularly useful.

This vacuum is versatile, working well on both tile and carpet, and it automatically adjusts its power depending on the surface. Finally, the noise level is significantly lower than that of traditional corded vacuums.

✅ Key specs of Shark BU3521 Cordless Stick Vacuum

The Shark Clean & Empty is a cordless stick vacuum designed for both carpet and hard floor cleaning. It boasts spotless cleaning capabilities, high precision sensors, and a lightweight design. A HEPA filter ensures effective allergen capture, and it comes with a crevice tool for detailed cleaning.

This vacuum has a 1.3-liter capacity and operates at 180 watts. The lithium-ion battery provides a runtime of 40 minutes with a 5-hour charging time. It can function as both a stick and handheld vacuum, which adds to its versaility.

The color is white, the model name is Clean & Empty, and it has a push button controller with touch control methods. Included is a crevice tool and a pet multi-tool attachment to cater for different cleaning requirements.

The product dimensions are 14.69"L x 10.43"W x 43.5"H, and it weighs 11.24 pounds. It has a polished finish and is intended for indoor usage only.

This stick vacuum requires 1 lithium-ion battery, which is included. The amperage is 25 amps, and the battery life matches the runtime at 40 minutes. The UPC is 622356647465, the manufacture year is 2024, and the ASIN is B0D15YWYMD. The item model number is BU3521.

Currently, it holds a customer rating of 4.4 out of 5 stars from 453 ratings. It ranks #39,239 in Home & Kitchen and #127 in Stick Vacuums & Electric Brooms.

✅ Comparison to similar models

✔ Shark BU3521 Cordless Stick Vacuum vs. Dreame R10 Pro Cordless Vacuum

The Shark BU3521 edges out the Dreame R10 Pro, primarily due to its established brand recognition. It also has several key "Special Features", including automatic emptying/charging, which the Dreame lacks. The Shark features a HEPA filter, preferred for its superior allergen capture compared to the Dreame's cartridge filter. The Shark boasts a larger 1.3-liter capacity, allowing for less frequent emptying, and a higher wattage of 180 watts, potentially indicating stronger suction. The Shark is also a 2-in-1 Stick and Handheld and has automatic emptying. The Shark model has also had good customer reviews.

The Dreame R10 Pro shines with its comprehensive set of included components, providing greater versatility for various cleaning tasks. It also has a longer runtime of 65 minutes and faster charging time of 3.5 hours. It also has a lower noise level and power levels.

The Dreame R10 Pro's more compact dimensions make it easier to store and maneuver. It is lighter, weighs less than the Shark, and has a Motor Horsepower rating. The customer should also consider these factors.

The remaining features like Cordless, Recommended Uses, Color, Model Name, Battery Description, Number of Items, Controller Type, Control Method, Style, Portable, Number of Handles, Indoor/Outdoor Usage, Finish Type, ASIN, Item Model Number, Batteries Required and Battery Type are either tied or subjective.

✔ Shark BU3521 Cordless Stick Vacuum vs. FABULETTA FSV006 Pro Cordless Vacuum Cleaner

Shark's BU3521 edges out FABULETTA's FSV006 Pro primarily due to its established brand reputation and the significant convenience of automatic emptying. Although, Fabuletta is a good vacuum. Less dust exposure during emptying is also a considerable advantage for allergy sufferers. The auto-adjusting floor type feature and quiet mode during charging adds to the overall user experience. Finally, slightly higher customer ratings with a larger sample size suggest greater satisfaction.

However, the FABULETTA FSV006 Pro shines in several key areas. Its significantly lighter weight makes it a breeze to maneuver, especially for above-floor cleaning. The suction power is explicitly stated as a very strong 38,000Pa in MAX mode, which is impressive. It also boasts a longer runtime, allowing for extended cleaning sessions.

Furthermore, the FABULETTA includes a more comprehensive set of accessories for tackling diverse cleaning tasks. The higher wattage and faster charging time are also beneficial. Finally, assuming a lower price point, the Fabuletta becomes an even more attractive option for budget-conscious buyers.

The HEPA filtration is a tie, as both vacuums offer this essential feature. The Shark has a slightly larger dustbin capacity, which may be preferable for some.

✔ Shark BU3521 Cordless Stick Vacuum vs. OXVAC SV007 Cordless Vacuum Cleaner

Shark's BU3521 emerges as a stronger contender due to its well-established brand reputation, superior features, and automatic emptying. While both vacuums utilize HEPA filters, Shark further distinguishes itself with Spotless Cleaning, High Precision Sensors, and the inclusion of a Pet-Multi tool.

The OXVAC SV007 counters with a higher wattage (500W vs. 180W), promising stronger suction, and boasts a longer runtime of 60 minutes compared to Shark's 40 minutes. Its charging time is also quicker, at 4 hours versus 5 hours for the Shark. The OXVAC is significantly lighter, weighing in at only 3 pounds compared to the Shark's 11.24 pounds.

While both vacuums are suitable for both carpet and hard floors, the Shark offers a 1.3-liter capacity (assuming volume, despite the incorrect unit), which is potentially larger than the OXVAC's 1.5 grams. The Shark's stick and handheld form factor provides added versatility, and its smaller product dimensions may be preferable for storage.

Customer feedback favors the Shark, evidenced by its 4.4 out of 5 stars across 453 ratings, compared to the OXVAC's 4.6 out of 5 stars with significantly fewer (17) ratings. Shark also boasts the automatic emptying and an improved filtration system. The presence of Quiet Mode, LED Headlights, and Auto-adjusting & Multi-surface brushroll further tilts the scales in Shark's favor.

✔ Shark BU3521 Cordless Stick Vacuum vs. dsorupa SmartVac Pro Cordless Vacuum

When comparing the Shark BU3521 and the dsorupa SmartVac Pro, the Shark wins out in brand recognition due to its established reputation in the vacuum cleaner market. The Shark also boasts compelling special features, particularly its automatic charging and emptying capability, offering a higher level of convenience to the user.

Both vacuums offer HEPA filtration and are cordless, resulting in a tie for these features. However, the dsorupa includes a more comprehensive set of included components and accessories. It also edges out the Shark in capacity, offering a slightly larger 1.5-liter dustbin compared to the Shark's 1.3 liters.

The dsorupa has a significantly higher wattage at 550W compared to the Shark's 180W, suggesting a more powerful suction. It also provides a longer runtime of up to 60 minutes and a faster charging time of 4.5 hours. While both are suitable for common household cleaning, the Shark offers more versatility with its stick and handheld form factor.

The dsorupa wins when it comes to product dimensions, with more compact measurement that may make it easier to store. The Shark lacks the noise level details while the dsorupa operates at a low noise level of ≤ 63 dB. The dsorupa is lighter, weighing only 8 pounds. Customer reviews give the dsorupa a higher rating. The dsorupa also shows stronger sales and popularity. Lastly, the dsorupa has a double handle that manufacturer states provides an easier cleaning.

✅ Conclusion

The Shark Clean & Empty distinguishes itself with its convenience and efficiency. The automatic emptying and charging, coupled with its lightweight design and cordless operation, make cleaning less of a chore. Its versatility across different floor types, combined with features like auto-adjusting suction and HEPA filtration, solidify its place as a solid contender in the cordless vacuum market. While the 40-minute runtime might be a limiting factor for larger homes, the quick charging time and available accessories enhance its overall value for everyday cleaning tasks.