Stick Vacuums

Shark Clean & Empty Cordless Stick Vacuum BU3521

Why choose it

Choose the BU3521 if you want the vacuum to empty into its charging dock after cleaning, with a hand vacuum for furniture.¹²

Plan around the stated runtime: up to 40 minutes is measured at the hand vacuum in ECO mode.¹

Cleaning arrangement: Converts to Handheld²
Rated battery runtime: 40 min (Tested configuration: Up to 40 minutes in ECO mode, measured at the hand vacuum.)¹
Power and charging: Battery Power Source²

The details

Core specifications6

Shark Clean & Empty Cordless Stick Vacuum BU3521: core specifications
Cleaning arrangement	Converts to Handheld²
Suitable surfaces	Hardwood²
Rated battery runtime	40 min (Tested configuration: Up to 40 minutes in ECO mode, measured at the hand vacuum.)¹
Included dock functions	Return the vac to its charging dock, where it automatically empties into the base.¹
Included cleaning tools	8" Duster Crevice Tool Pet Multi Tool¹
Dock debris-container capacity	1.3 L (Tested configuration: Supplied auto-empty dock container; this is not the hand vacuum dust cup.)¹

Fit and compatibility1

Shark Clean & Empty Cordless Stick Vacuum BU3521: fit and compatibility
Power and charging	Battery Power Source²

More specifications1

Shark Clean & Empty Cordless Stick Vacuum BU3521: more specifications
Warranty terms	Warranty (years): 5 Warranty on Part (Years): 2¹

Specifications not documented (5)

Battery service, Dust-cup capacity, Cleaner weight, Filter care, Brushroll care.