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Bosch Unlimited Serie 6 BKS611MTB Review | 52 Data compared

Avg. price:~£260Suction power (AW):?Battery runtime:30 minutesCapacity:0.3 LWeight:2.3 kg

Bosch Unlimited Serie 6 BKS611MTB Review: Compare 52 technical specifications and user reviews to see how this product ranks in the Vacuum Cleaners category and whether it is worth buying.

6.5

Overall score

Score
6.5/ 10
✕
What it is
An overall evaluation of the vacuum cleaner's quality, based on technical analysis and user reviews.
When it matters
When you need a quick reference for identifying the best vacuum cleaners on the market.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 73% of models
Score components

80%

6.5

Technical Score

20%

?

User score

â–¼Worse than 73% of vacuum-cleaners
6.5

Technical Score

Technical score
6.5/ 10
✕
What it is
An assessment of the vacuum cleaner's technical performance across six key areas: performance, battery and power supply, filtration, attachments, design, and smart features.
When it matters
When you want to compare vacuum cleaners by cleaning performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 57% of models
Score components

28%

6.9

Performance

22%

5.6

Battery

18%

6.4

Filtration

14%

7.6

Attachments

10%

7.7

Design

8%

4.0

Smart features

â–¼Worse than 57% of vacuum-cleaners
?

User score

User score
8.0/ 10
✕
What it is
A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
When it matters
When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 73% of models
Score components

70%

?

User ratings

30%

?

Number of reviews

  • No image
No image

Best prices

    N/A~ £260
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Best rankings

Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Verdict

The Bosch Unlimited Serie 6 BKS611MTB is a German-made 2-in-1 cordless stick and handheld vacuum cleaner featuring an 18V 2.5 Ah lithium-ion battery, a lightweight 2.4 kg body, and a compact 700W TurboSpin brushless motor. Operating at a noise level of up to 85 dB across two power settings, it delivers a 30-minute maximum runtime on its normal mode and uses a bagless cartridge filter system with a PureAir membrane. Main pros include a motorized AllFloor Power Brush ensuring efficient dust pickup, a detachable handstick format for tight spaces, and high versatility via a removable battery pack that integrates with the Bosch Power For All 18V tool ecosystem. However, notable cons include a highly limited 0.3-litre dust container capacity that requires frequent emptying, a long 4-hour full recharge time, and a fine filter design prone to rapid clogging that requires manual, dusty maintenance.

Technical Specifications of vacuum cleaner Bosch Unlimited Serie 6 BKS611MTB

Technical Score
Technical score
6.5/ 10
✕
What it is
An assessment of the vacuum cleaner's technical performance across six key areas: performance, battery and power supply, filtration, attachments, design, and smart features.
When it matters
When you want to compare vacuum cleaners by cleaning performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 57% of models
Score components:

28%

6.9

Performance

22%

5.6

Battery

18%

6.4

Filtration

14%

7.6

Attachments

10%

7.7

Design

8%

4.0

Smart features

6.5
Bosch Unlimited Serie 6 BKS611MTB has a technical score of 6.5 points, which is lower than 57% of vacuum cleaners.
User score
User score
8.0/ 10
✕
What it is
A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
When it matters
When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 73% of models
Score components

70%

?

User ratings

30%

?

Number of reviews

?
Popularity
Popularity
1.0/ 10
✕
What it is
An indicator based on the number of reviews received by the vacuum cleaner.
When it matters
When you prefer a vacuum cleaner that has been chosen and reviewed by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 99% of models
Popularity:
Bosch Unlimited Serie 6 BKS611MTB has a popularity score of 1 point, which is lower than 61.7% of vacuum cleaners.
1.0
Bosch Unlimited Serie 6 BKS611MTB has a popularity score of 1 point, which is lower than 61.7% of vacuum cleaners.
Ratio quality/price
Value for money
7.3/ 10
✕
What it is
An indicator that combines the vacuum cleaner's overall score with its price.
When it matters
When you are looking for a vacuum cleaner with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 86% of models
Score components:

60%

6.5

Overall score

40%

9.2

Price

7.3
Bosch Unlimited Serie 6 BKS611MTB has a value-for-money score of 7.3 points, which is lower than 78.9% of vacuum cleaners.
Suction power (AW)
?
Suction power (kPa)
?
Airflow
?
Motor type
brushless
Power consumption
700 W
Power consumption
700 W
â–¼ Worse than 61% of models
Market range: <165 W – >899 W
This vacuum cleaner draws 700 W, which is higher than the power consumption of 61.1% of vacuum cleaners and equal to that of 7.5% of vacuum cleaners.
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Cordless
yes
Cordless
yes
â–² Better than 51% of models
This vacuum cleaner works cordlessly. 49.5% of vacuum cleaners offer cordless operation.
Battery runtime
30 minutes
Battery runtime
30 minutes
â–¼ Worse than 89% of models
Market range: <30 minutes – >70 minutes
This vacuum cleaner offers a battery runtime of 30 minutes, which is shorter than that of 89.1% of vacuum cleaners and equal to that of 6.4% of vacuum cleaners.
Charging time
4 hours
Charging time
4 hours
â–² Better than 42% of models
Market range: <3 hours – >5 hours
This vacuum cleaner charges in 4 hours, which is faster than 42.4% of vacuum cleaners and equal to 25.6% of vacuum cleaners.
Battery capacity
2,500 mAh
Battery capacity
2,500 mAh
â–² Better than 48% of models
Market range: <2k mAh – >3.6k mAh
This vacuum cleaner has a battery capacity of 2,500 mAh, which is larger than that of 48.1% of vacuum cleaners and equal to that of 24.7% of vacuum cleaners.
Battery voltage
18 V
Battery voltage
18 V
â–¼ Worse than 80% of models
Market range: <18 V – >28.8 V
This vacuum cleaner uses a battery voltage of 18 V, which is lower than that of 79.8% of vacuum cleaners and equal to that of 16% of vacuum cleaners.
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Filter class
hepa
Filter class
hepa
â–¼ Worse than 38% of models
This vacuum cleaner uses filter class hepa, which is more advanced than the class used by 16% of vacuum cleaners and the same as the class used by 46% of vacuum cleaners.
Minimum overall efficiency
99.9%
Minimum overall efficiency
99.9%
â–¼ Worse than 68% of models
Market range: <95 % – >99.99 %
This vacuum cleaner reaches 99.9% minimum overall efficiency, which is lower than that of 68.1% of vacuum cleaners and equal to that of 10.6% of vacuum cleaners.
Suitable for allergy sufferers
no
Suitable for allergy sufferers
no
â–¼ Worse than 83% of models
This vacuum cleaner is not suitable for allergy sufferers. 82.4% of vacuum cleaners are allergy-friendly.
Capacity
0.3 L
Capacity
0.3 L
â–¼ Worse than 96% of models
Market range: <0.44 L – >4 L
This vacuum cleaner has a dust capacity of 0.3 L, which is smaller than that of 96% of vacuum cleaners and equal to that of 3.1% of vacuum cleaners.
Bagless
yes
Bagless
yes
â–² Better than 21% of models
This vacuum cleaner uses a bagless design. 78.6% of vacuum cleaners use this setup.
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Main brush type
roll brush
Roller type
bristled
Anti-tangle brush
no
Anti-tangle brush
no
â–¼ Worse than 26% of models
This vacuum cleaner does not include an anti-tangle brush. 25.7% of vacuum cleaners include this feature.
Mini motorized brush
yes
Mini motorized brush
yes
â–² Better than 73% of models
This vacuum cleaner includes a mini motorized brush. 26.9% of vacuum cleaners include this attachment.
Suitable for pet owners
yes
Suitable for pet owners
yes
â–² Better than 28% of models
This vacuum cleaner is suitable for pet owners. 72% of vacuum cleaners handle pet hair well.
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Vacuum type
stick
Weight
2.3 kg
Weight
2.3 kg
â–² Better than 85% of models
Market range: <2.15 kg – >7.1 kg
This vacuum cleaner weighs 2.3 kg, which is lower than the weight of 84.6% of vacuum cleaners and equal to that of 2.2% of vacuum cleaners.
2-in-1 design
yes
2-in-1 design
yes
â–² Better than 47% of models
This vacuum cleaner offers a 2-in-1 design. 53% of vacuum cleaners offer this flexible format.
Self-standing
no
Self-standing
no
â–¼ Worse than 19% of models
This vacuum cleaner does not stand on its own. 18.9% of vacuum cleaners offer this convenience.
Adjustable tube height
no
Adjustable tube height
no
â–¼ Worse than 47% of models
This vacuum cleaner does not include adjustable tube height. 47.4% of vacuum cleaners offer this ergonomic feature.
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Auto suction adjustment
no
Auto suction adjustment
no
â–¼ Worse than 20% of models
This vacuum cleaner does not support automatic suction adjustment. 19.9% of vacuum cleaners support this feature.
Dust particle sensor
no
Dust particle sensor
no
â–¼ Worse than 8% of models
This vacuum cleaner does not include a dust particle sensor. 8% of vacuum cleaners include this feature.
LED display
no
LED display
no
â–¼ Worse than 26% of models
This vacuum cleaner does not include an LED display. 25.9% of vacuum cleaners include this interface feature.
Nozzle light
no
Nozzle light
no
â–¼ Worse than 43% of models
This vacuum cleaner does not include a nozzle light. 43.4% of vacuum cleaners include this visibility feature.
Mopping support
no
Mopping support
no
â–¼ Worse than 4% of models
This vacuum cleaner does not support mopping. 3.7% of vacuum cleaners support this multi-function feature.

Bosch Unlimited Serie 6 BKS611MTB vs the average vacuum cleaner

246810TotalPerformanceBatteryFiltrationAttachmentsDesignSmart features
  • Cordless operation
    Cordless
    yes
    â–² Better than 51% of models
    This vacuum cleaner works cordlessly, the average vacuum cleaner does not.
  • Includes mini motorized brush
    Mini motorized brush
    yes
    â–² Better than 73% of models
    This vacuum cleaner includes a mini motorized brush, the average vacuum cleaner does not.
  • Includes removable battery
    Removable battery
    yes
    â–² Better than 61% of models
    This vacuum cleaner includes a removable battery, the average vacuum cleaner does not.
  • 36.5% lower weight
    Weight
    2.3 kg
    â–² Better than 85% of models
    Market range: <2.15 kg – >7.1 kg
    This vacuum cleaner is lighter than the average vacuum cleaner (2.3 kg vs 3.62 kg).
    2.3 kg vs 3.62 kg
  • Includes wall bracket
    Wall-mounted bracket
    yes
    â–² Better than 64% of models
    This vacuum cleaner includes a wall-mounted bracket, the average vacuum cleaner does not.
  • 65 mm narrower body
    Width
    200 mm
    ★ Better than 94% of models
    Market range: <229 mm – >350 mm
    This vacuum cleaner is narrower than the average vacuum cleaner (200 mm vs 265 mm).
    200 mm vs 265 mm
  • Cordless operation
    Cordless
    yes
    â–² Better than 51% of models
    This vacuum cleaner works cordlessly, the average vacuum cleaner does not.
  • Includes removable battery
    Removable battery
    yes
    â–² Better than 61% of models
    This vacuum cleaner includes a removable battery, the average vacuum cleaner does not.
  • Includes mini motorized brush
    Mini motorized brush
    yes
    â–² Better than 73% of models
    This vacuum cleaner includes a mini motorized brush, the average vacuum cleaner does not.
  • 36.5% lower weight
    Weight
    2.3 kg
    â–² Better than 85% of models
    Market range: <2.15 kg – >7.1 kg
    This vacuum cleaner is lighter than the average vacuum cleaner (2.3 kg vs 3.62 kg).
    2.3 kg vs 3.62 kg
  • Includes wall bracket
    Wall-mounted bracket
    yes
    â–² Better than 64% of models
    This vacuum cleaner includes a wall-mounted bracket, the average vacuum cleaner does not.
  • 65 mm narrower body
    Width
    200 mm
    ★ Better than 94% of models
    Market range: <229 mm – >350 mm
    This vacuum cleaner is narrower than the average vacuum cleaner (200 mm vs 265 mm).
    200 mm vs 265 mm
  • More operating noise
    Noise level (Min-Max)
    85-85 dB
    â–¼ Worse than 91% of models
    Market range: <65 dB – >83 dB
    This vacuum cleaner is noisier than the average vacuum cleaner (85-85 dB vs 77-77 dB).
    85-85 dB vs 77-77 dB
  • 20 minutes shorter runtime
    Battery runtime
    30 minutes
    â–¼ Worse than 89% of models
    Market range: <30 minutes – >70 minutes
    This vacuum cleaner offers shorter battery runtime than the average vacuum cleaner (30 minutes vs 50 minutes).
    30 minutes vs 50 minutes
  • 0.7 L smaller dust container
    Capacity
    0.3 L
    â–¼ Worse than 96% of models
    Market range: <0.44 L – >4 L
    This vacuum cleaner has a smaller dust capacity than the average vacuum cleaner (0.3 L vs 1 L).
    0.3 L vs 1 L
  • Not allergy-friendly
    Suitable for allergy sufferers
    no
    â–¼ Worse than 83% of models
    This vacuum cleaner is not suitable for allergy sufferers, the average vacuum cleaner is.
  • No upholstery nozzle
    Upholstery nozzle
    no
    â–¼ Worse than 68% of models
    This vacuum cleaner does not include an upholstery nozzle, the average vacuum cleaner does.
  • No cyclonic technology
    Cyclonic technology
    no
    â–¼ Worse than 71% of models
    This vacuum cleaner does not use cyclonic technology, the average vacuum cleaner does.
  • 4.2 V lower voltage
    Battery voltage
    18 V
    â–¼ Worse than 80% of models
    Market range: <18 V – >28.8 V
    This vacuum cleaner has a lower battery voltage than the average vacuum cleaner (18 V vs 22.2 V).
    18 V vs 22.2 V
  • 0.05 % lower filtration efficiency
    Minimum overall efficiency
    99.9 %
    â–¼ Worse than 68% of models
    Market range: <95 % – >99.99 %
    This vacuum cleaner has lower filtration efficiency than the average vacuum cleaner (99.9 % vs 99.95 %).
    99.9 % vs 99.95 %
  • 5.2% worse value for money
    Bosch Unlimited Serie 6 BKS611MTB offers worse value for money than the average vacuum cleaner (7.27 vs 7.6).
    7.27 vs 7.65
  • 73.3% more expensive
    Bosch Unlimited Serie 6 BKS611MTB is more expensive than the average vacuum cleaner (£260 vs £150).
    £260 vs £150
  • More operating noise
    Noise level (Min-Max)
    85-85 dB
    â–¼ Worse than 91% of models
    Market range: <65 dB – >83 dB
    This vacuum cleaner is noisier than the average vacuum cleaner (85-85 dB vs 77-77 dB).
    85-85 dB vs 77-77 dB
  • No cyclonic technology
    Cyclonic technology
    no
    â–¼ Worse than 71% of models
    This vacuum cleaner does not use cyclonic technology, the average vacuum cleaner does.
  • 100 W higher power consumption
    Power consumption
    700 W
    â–¼ Worse than 61% of models
    Market range: <165 W – >899 W
    This vacuum cleaner draws more power than the average vacuum cleaner (700 W vs 600 W).
    700 W vs 600 W
  • 20 minutes shorter runtime
    Battery runtime
    30 minutes
    â–¼ Worse than 89% of models
    Market range: <30 minutes – >70 minutes
    This vacuum cleaner offers shorter battery runtime than the average vacuum cleaner (30 minutes vs 50 minutes).
    30 minutes vs 50 minutes
  • 4.2 V lower voltage
    Battery voltage
    18 V
    â–¼ Worse than 80% of models
    Market range: <18 V – >28.8 V
    This vacuum cleaner has a lower battery voltage than the average vacuum cleaner (18 V vs 22.2 V).
    18 V vs 22.2 V
  • 4 minutes shorter turbo runtime
    Turbo mode runtime
    8 minutes
    â–¼ Worse than 77% of models
    Market range: <6 minutes – >20 minutes
    This vacuum cleaner offers shorter turbo runtime than the average vacuum cleaner (8 minutes vs 12 minutes).
    8 minutes vs 12 minutes
  • 0.7 L smaller dust container
    Capacity
    0.3 L
    â–¼ Worse than 96% of models
    Market range: <0.44 L – >4 L
    This vacuum cleaner has a smaller dust capacity than the average vacuum cleaner (0.3 L vs 1 L).
    0.3 L vs 1 L
  • Not allergy-friendly
    Suitable for allergy sufferers
    no
    â–¼ Worse than 83% of models
    This vacuum cleaner is not suitable for allergy sufferers, the average vacuum cleaner is.
  • 0.05 % lower filtration efficiency
    Minimum overall efficiency
    99.9 %
    â–¼ Worse than 68% of models
    Market range: <95 % – >99.99 %
    This vacuum cleaner has lower filtration efficiency than the average vacuum cleaner (99.9 % vs 99.95 %).
    99.9 % vs 99.95 %
  • No upholstery nozzle
    Upholstery nozzle
    no
    â–¼ Worse than 68% of models
    This vacuum cleaner does not include an upholstery nozzle, the average vacuum cleaner does.
  • 120 mm taller body
    Height
    1,220 mm
    â–¼ Worse than 87% of models
    Market range: <290 mm – >1.2k mm
    This vacuum cleaner is taller than the average vacuum cleaner (1220 mm vs 1100 mm).
    1,220 mm vs 1,100 mm

Graphic comparison of Bosch Unlimited Serie 6 BKS611MTB and other vacuum cleaners

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Third-party reviews

What customers like about Bosch Unlimited Serie 6 BKS611MTB?

  • Extremely lightweight, making it easy to maneuver on stairs and reach ceilings.
  • Interchangeable 18V Power for ALL battery pack is compatible with other Bosch power tools.
  • Convenient trigger operation that does not require holding down the power button continuously.
  • Quiet operation compared to many traditional vacuum cleaners, except when using turbo mode.
  • Features a robust, space-saving wall dock that neatly stores the vacuum and its accessories.
  • The motorized brush performs highly effectively across different floor types, including carpets and tiles.

What customers dislike about Bosch Unlimited Serie 6 BKS611MTB?

  • The 0.3-liter dust container is quite small and requires frequent emptying.
  • A standard full battery recharge takes around 4 hours, which is relatively slow.
  • Suction power on normal mode can feel weak, often forcing users to rely on turbo mode.
  • Running the vacuum continuously on turbo mode severely drains the battery within minutes.
  • The included flexible crevice nozzle can be flimsy and awkward to guide into tight spots.

Compare Bosch Unlimited Serie 6 BKS611MTB with other vacuum cleaners

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