VC 4 vs BU3521UK Cordless Vacuums

Torn between VC 4 and BU3521UK for your next cordless vacuum?

We examine the VC 4 – a battery-power vacuum by Karcher, comparing runtime, dust tank, and costs, with – BU3521UK by Shark, analysing real-world vacuuming performance.

By assessing these vacuums – the VC 4 and BU3521UK from KARCHER and SHARK, you get the best floorcare machine.

Best Cordless Vacuum Pick

KARCHER VC 4 vs SHARK BU3521UK – key Specifications

VC 4 and BU3521UK Cordless Battery Run Time

KARCHER Stick cordless vacuums, like the VC 4, provides lightweight portability without mains cables. BU3521UK Stick is also cordlessly powered by a SHARK rechargeable battery.

The Shark BU3521UK has a battery supply runtime of 40 minutes of cleaning, compared to the Karcher VC 4 which has 30 minutes life.

• KARCHER VC 4 Runtime: 30 mins continuous vacuuming
• SHARK BU3521UK Runtime: 40 mins continuous vacuuming

Charging times between the VC 4 and BU3521UK varies – check manual.

Cordless Vacuum Dust Tank Capacity

Both Karcher VC 4 and Shark BU3521UK are bagless, storing dust, hairs, dirt, and debris inside a sealed 0.65 litre and 0.42 litre tank, respectively. The BU3521UK by SHARK holds up to 0.42 Litre of compressed dirty particles. The VC 4 by KARCHER has a capable capacity of 0.65 litre for manual disposable.

• VC 4 onboard dirt/dust tank size: 0.65L
• BU3521UK onboard dirt/dust tank size: 0.42L

Floor Cleaning Types

Karcher’s VC 4 and Shark’s BU3521UK brush heads are effective on every surface – carpets & deep-pile rugs, hard floors (laminate, wood, tiles), vinyl, even upholstery, and stairs.

Their only limitation is the BU3521UK and VC 4 can’t vacuum liquids. For this, a SHARK or KARCHER ‘wet and dry’ vacuum is needed.

Most Karcher and Shark battery powered vacuums include accessories. Check VC 4 or BU3521UK manual for specifications and attachments.

Vacuum Filtration

The BU3521UK and KARCHER VC 4 include effective filters to capture dust, dander, pollen, hairs, and fibres.

KARCHER and SHARK use HEPA, foam, or cloth, filters. VC 4 and BU3521UK maintain suction and clean exhaust air.

SHARK and KARCHER Reviews

Combined feedback from 19 reviewers shows the VC 4 with a rating of 4.4/5 stars, and the BU3521UK vacuum gains a 4.4/5 average from 128 reviews, showing comparable reliability results.

Brand	Model	Runtime	Weight	Tank	Best Price
KARCHER	VC 4	30 M	2.5	0.65L	£142.97
SHARK	BU3521UK	40 M	2.7	0.42L	£349.99