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The Shark BU3521EU is a cordless upright vacuum with a 240 W motor, a bagless bin and a 2-in-1 design that converts to a handheld for stairs and above-floor cleaning. It weighs about 6 lb, has an LED headlight for spotting debris under furniture, and is rated for both carpet and hardwood. It suits people who want a light, quick-draw vacuum for daily messes rather than a deep-clean machine. Against corded uprights it trades raw suction and unlimited runtime for freedom from cords; against premium cordless sticks it gives up runtime and filtration refinement. Owners rate it well overall, with most complaints about battery life and bin capacity.
In stock
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Lowest price we've seen: $264.94 on Nov 9 at Tiny Lux. Tracked across 1 store since Nov 9.
Owners rate the BU3521EU around 4.4 out of 5 and mostly praise its light weight and handy 2-in-1 conversion. Criticism centers on battery runtime and how often the small bin needs emptying.
