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The Shark BU3523 is a cordless stick vacuum that empties itself. When you dock it, debris is pulled into a 1.3-liter base and the vacuum starts charging. Its self-cleaning PowerFins brushroll adjusts between carpet and hard floors and resists hair wrap, and a sealed HEPA system traps dust and allergens. Runtime reaches 40 minutes in ECO mode with a non-motorized tool, and the 5-hour charge and 11.2 lb weight are the main compromises. It suits homes with pets or heavy shedding where emptying a bin by hand is the chore people want gone; against rivals, the auto-empty base is the draw, while raw runtime and weight trail lighter sticks.
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The Shark BU3523 is a cordless stick vacuum with an auto-empty base. When the vacuum returns to its dock, it transfers debris into a 1.3-liter base and charges for the next cleanup.
Its self-cleaning MultiSurface PowerFins brushroll adjusts for carpet and hard floors and helps prevent hair wrap. A sealed HEPA system traps more than 99.97% of dust and allergens down to 0.3 microns under the stated test method. LED headlights light up debris on the floor.
The handheld unit is removable. Use it with the motorized pet tool or the duster crevice tool to clean furniture, stairs, and narrow spaces. Runtime is up to 40 minutes in ECO mode with a non-motorized tool.
