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Roborock E4 Vacuum Review

Tested using Methodology v0.8
Reviewed Sep 14, 2020 at 09:08 am
Roborock E4 Picture
8.4
Bare Floor
6.8
Low-Pile Carpet
6.8
High-Pile Carpet
8.8
Pets
6.2
Stairs
6.0
Cars
Current deal: The Roborock E4 has dropped by $110 on Amazon.com. See all Cyber Monday deals on Vacuums.
Vacuum Type
Robot
Bagless
Yes
Cordless
Yes
Anti-Allergy Filter (HEPA)
Yes

The Roborock E4 is a robot vacuum with decent performance overall. It's similar in many ways to the Roborock S4 but lacks the former's LIDAR navigation system, which means you can't have it clean specific rooms or areas at scheduled times. That said, it has outstanding performance on bare floors, a very good build quality, and is relatively simple to take apart and reassemble. Its compact form allows it to maneuver effectively in tight areas, while its light weight makes it easy to carry up and down flights of stairs. That said, it struggles with both small and large debris on carpeted floors. There are a few parts that need to be replaced on a regular basis, which can quickly add up in terms of cost. However, the vacuum's companion app makes it quite easy to track the current status of any part that requires scheduled replacement.

Our Verdict

8.4 Bare Floor

The Roborock E4 is great for bare floors. It has no trouble picking up pet hair as well as small and large debris. That said, you may experience a slight drop in performance when clearing large amounts of material like cereal, which can slightly block the entrance to the dirt compartment. It's very well-built and easy to maintain, but there are quite a few parts that need to be taken care of.

Pros
  • Outstanding performance on bare floors.
  • Very good build quality.
  • Great maneuverability.
  • Remarkable battery life.
Cons
  • Many maintenance needs.
  • High recurring costs.
6.8 Low-Pile Carpet

The Roborock E4 is okay for low-pile carpet. It's sturdily-built and fairly easy to maintain, but there are quite a few components that need regular cleaning or replacement. While it does a good job of clearing pet hair on this kind of surface, it may take a few passes to completely clear small and large debris.

Pros
  • Excellent pet hair cleaning capability.
  • Very good build quality.
  • Remarkable battery life.
Cons
  • Struggles with small and large debris.
  • Many maintenance needs.
  • High recurring costs.
6.8 High-Pile Carpet

The Roborock E4 is adequate for high-pile carpet. Unlike many other robot vacuums, it can maneuver effectively on this kind of surface, though it doesn't do an especially impressive job of picking up small and large debris. However, it has no trouble clearing pet hair, is very well-built, and has a decently large dirt compartment for a robot vacuum.

Pros
  • Excellent pet hair cleaning capability.
  • Very good build quality.
  • Remarkable battery life.
Cons
  • Struggles with small and large debris.
  • Many maintenance needs.
  • High recurring costs.
8.8 Pets

The Roborock E4 is an excellent fit for pet owners. It has no trouble clearing pet hair on a variety of surfaces while its self-adjusting power level should allow it to adapt to different surface types. Although quite a few parts need regular maintenance, the vacuum is quite easy to take apart and is very well-built.

Pros
  • Outstanding performance on bare floors.
  • Excellent pet hair cleaning capability.
  • Very good build quality.
  • Remarkable battery life.
Cons
  • Many maintenance needs.
  • High recurring costs.
6.2 Stairs

The Roborock E4 is a robot vacuum that isn't suitable for cleaning stairs.

6.0 Cars

The Roborock E4 is a robot vacuum that isn't meant to clean the inside of cars.

  • 8.4 Bare Floor
  • 6.8 Low-Pile Carpet
  • 6.8 High-Pile Carpet
  • 8.8 Pets
  • 6.2 Stairs
  • 6.0 Cars

Test Results

perceptual testing image
Design
8.0
Design
Build Quality

The Roborock E4 is an impressively well-built vacuum. It's made of dense, high-grade plastic that looks and feels quite premium. The top cover, used to access the brushroll, features a matte finish and stays open during maintenance. The durable rubber-coated wheels slightly lift the unit and allow it to roll smoothly on carpeted surfaces. However, the dirt compartment feels a little flimsy and could crack if dropped. There are two sets of speakers in the body that provide audible updates concerning the vacuum's current status. The body also has a prominent power button and a button to send it back to its charging dock.

The setup process is user-friendly, requiring you to sync the machine to either the Mi Home or Roborock apps and allow it to connect to its charging dock.

5.5
Design
User Maintenance

The Roborock E4 is fairly easy to maintain, with a design that makes it easy to access its various parts. That said, there are a lot of parts that require regular maintenance, which can be a nuisance. However, it's easier to maintain than the ONSON GOOVI F007 Robot Vacuum.

  • Brushroll: The main brushroll can be accessed by removing the plastic brush guard under the vacuum. It should be cleaned once or twice a week depending on use.
  • Side brush: The side brush can be removed with a screwdriver and should be cleared of debris every month.
  • Dirt compartment: The dirt compartment is located underneath the top cover and should be emptied fairly frequently depending on use. It can be cleaned with water, but make sure that the component is dry before putting it back in the unit.
  • Filter: To access the HEPA filter, you need to remove the dirt compartment and then un-clip the filter from its socket. It should be washed every two weeks and left to dry for at least 24 hours before putting it back in place.
  • Wheel: The omnidirectional wheel, located at the rear end of the vacuum, should be cleared of debris once a month by removing it from its socket. Be aware that it can take quite a bit of force to separate it from the main body.
  • Sensors: The sensors and charging ports on the vacuum body need to be cleaned with dry cloths after 30 hours of use.

The Mi Home app gives you an estimated service life of every part depending on use and will notify you when it's time to replace a component.

5.0
Design
Recurring Cost
Bag Part Number
No bag
Filter Part Number
E11
HEPA Filter Part Number
E11

The Roborock E4 has a couple of recurring costs. The washable HEPA filter should be replaced after 150 hours of use. Similarly, the side brush should be cleaned once a month, but the manufacturer recommends replacing this part after 200 hours of use. The main brushroll is also disposable, but it has a much longer service life of 6 to 12 months, depending on your own usage.

You can check the estimated status of each component by looking at the 'Maintenance' tab on the vacuum's companion app. All of these parts are available on the Roborock store page on Amazon.

8.9
Design
Storing
Height
3.98 in (10.1 cm)
Width
13.78 in (35.0 cm)
Depth
15.75 in (40.0 cm)
Cord Storing/Management
Not Needed
On-Board Tool Storage
Not needed
Vacuum Rack/Station
Yes

Similar to many other robot vacuums, the Roborock E4 is amazingly easy to store due to its compact footprint. It even returns to its charging base automatically.

7.0
Design
Dirt Compartment
Dirt Compartment Volume
0.15 gal (0.55 L)
Full Dirt Compartment Indicator
Yes
Bag Included
No Bag Needed

This vacuum's dirt compartment is a decent size. It's larger than the dirt compartments found in the Roborock S5 and Roborock S4, but it still needs fairly frequent emptying. Its companion app will remind you to empty it regularly.

Design
In The Box

  • Roborock E4 vacuum
  • Charging dock
  • Charging cable
  • 1x HEPA filter
  • Main brushroll
  • Dirt compartment
  • Brushroll guard
  • User guide

10
Design
Range
Cord Length
N/A
Hose Length
N/A

This vacuum's range is only really limited by its battery life and dirt compartment fill status. That said, it can't climb or descend staircases.

8.1
Design
Portability
Total Weight
6.61 lbs (3.00 kg)
Weight In Hand
0.00 lbs (0.00 kg)
Carrying handle
No

The Roborock E4 has very good portability. Despite lacking a carrying handle, it's relatively easy to carry it around due to its light weight.

9.0
Design
Battery
Minimum Battery Life
114 min.
Maximum Battery Life
195 min.
Recharge Time
232 min.
Recharge Dock
Yes
Battery Life Indicator
Yes
Removable Batteries
No

The Roborock E4's battery performance is outstanding. Even when running continuously on its most powerful 'Max' mode, it lasts just under two hours. Using it in its least powerful 'Silent' mode, runtime extends to over three hours. However, the vacuum refuses all cleaning tasks once it drops below 20% charge and instead looks for its charging dock. Thankfully, it's easy to know when you're running out of battery as the power button goes from solid white to red when the charge level drops under 20%.

Design
Quality Of Life Features
Rotating Head
No
Power Adjustment
Yes
Self-Propelled
Yes
Headlights
No
Easy On/Off
Yes
Surface Type Adjustment
Manual And Automatic

The Roborock E4 has a couple of quality of life features. Four different surface modes adjust the vacuum's suction power to different surfaces, which can be selected automatically or manually. In increasing order of power, these modes are Silent, Balanced, Turbo, and Max. 'Balanced' is the default operating mode.

Design
Tools And Brushes
Brushroll
Yes
Brushroll On/Off
No
Removable Brushroll
Yes
Turbo Brush
No
Crevice Tool
No
Upholstery Tool
No
Soft Bristle Brush
No
Hard Bristle Brush
No
Extension Wand
No
Ceiling Fan Tool
No
Pet Grooming Tool
No

The Roborock E4 doesn't have much in the way of extra cleaning tools. It's equipped with a side brush to direct debris toward the main brushroll.

Design
Alternative Configuration

This vacuum doesn't have any alternative configurations.

Performance
9.7
Performance
Bare Floor (Hardwood, Laminate, Tiles)
Pet Hair at 0 gal (0L)
101 %
Large Debris at 0 gal (0L)
100 %
Large Debris at 0.07 gal (0.25L)
92 %
Large Debris at 0.2 gal (0.75L)
N/A
Large Debris at 0.4 gal (1.5L)
N/A
Large Debris at 0.8 gal (3L)
N/A
Large Debris at 1.6 gal (6L)
N/A
Small Debris at 0 gal (0L)
100 %
Small Debris at 0.07 gal (0.25L)
100 %
Small Debris at 0.2 gal (0.75L)
N/A
Small Debris at 0.4 gal (1.5L)
N/A
Small Debris at 0.8 gal (3L)
N/A
Small Debris at 1.6 gal (6L)
N/A
Setting Used "Balanced"

The Roborock E4 delivers remarkable performance on bare floors. It has no trouble clearing pet hair, large debris like cereal, and smaller debris like rice. However, it should be noted that some larger debris can get stuck at the entry to the dirt compartment as it fills up, causing them to become trapped in the main brushroll.

6.8
Performance
Low-Pile Carpet
Pet Hair at 0 gal (0L)
99 %
Large Debris at 0 gal (0L)
73 %
Large Debris at 0.07 gal (0.25L)
73 %
Large Debris at 0.2 gal (0.75L)
N/A
Large Debris at 0.4 gal (1.5L)
N/A
Large Debris at 0.8 gal (3L)
N/A
Large Debris at 1.6 gal (6L)
N/A
Small Debris at 0 gal (0L)
40 %
Small Debris at 0.07 gal (0.25L)
39 %
Small Debris at 0.2 gal (0.75L)
N/A
Small Debris at 0.4 gal (1.5L)
N/A
Small Debris at 0.8 gal (3L)
N/A
Small Debris at 1.6 gal (6L)
N/A
Setting Used "Max"

The Roborock E4 is alright on low-pile carpet. It doesn't have any trouble clearing pet hair, but struggles a little more with large debris and even more so with smaller, finer material, like baking soda.

6.8
Performance
High-Pile Carpet
Pet Hair at 0 gal (0L)
100 %
Large Debris at 0 gal (0L)
43 %
Large Debris at 0.07 gal (0.25L)
43 %
Large Debris at 0.2 gal (0.75L)
N/A
Large Debris at 0.4 gal (1.5L)
N/A
Large Debris at 0.8 gal (3L)
N/A
Large Debris at 1.6 gal (6L)
N/A
Small Debris at 0 gal (0L)
38 %
Small Debris at 0.07 gal (0.25L)
36 %
Small Debris at 0.2 gal (0.75L)
N/A
Small Debris at 0.4 gal (1.5L)
N/A
Small Debris at 0.8 gal (3L)
N/A
Small Debris at 1.6 gal (6L)
N/A
Setting Used "Max"

Unlike the Roborock S4, the Roborock E4 can maneuver on high-pile carpet. It doesn't have any trouble picking up pet hair, but it may take a lot of passes to completely clear both small and large debris.

8.0
Performance
Maneuverability
Under The Couch
Excellent
Under Low Table
Excellent
On Furniture
Not Possible
Rug With Tassel
Bad
Electric Cord
Bad

Despite lacking the more advanced LIDAR navigation system found in the Roborock S5 and S4, the Roborock E4 still does a very good job of maneuvering around a room. Its OpticEye navigation system creates a fairly efficient S-shaped cleaning route and identifies areas it may have missed on the first go-around. It even produces a map of the area it cleaned after completing a task, which you can view in its companion app. Its compact size allows it to go under couches and tables without a problem while its self-adjusting power level does a good job of quickly adapting to charging surface types. Unfortunately, it can get stuck on rug tassels and electrical cords.

Automation
7.7
Automation
Automation (Robot Vacuum)
Remote Controller
Yes (App only)
Automatic Bag Emptying
No
Automatic Recharging
Yes
Schedule Programming
Yes
Boundary Markers
No
Random Pathing
No
Smart Pathing
Yes
App Name
Mi Home

The Roborock E4 has a good selection of automation features. It can be used without initializing its companion app, as its physical buttons can be used to command it to start cleaning an entire area, spot clean, and return to its charging dock. With the companion app, you get access to many more options. It lets you schedule cleaning times, update the firmware, check maintenance status and cleaning history, and even remote control the vacuum to reorient it. Its OpticEye navigation system relies on internal gyroscopes and motion tracking to build a temporary map of the room it's cleaning, but doesn't allow you to schedule individual room cleanings. You also can't set up virtual room boundaries in their companion app, unlike the Roborock S5.

Differences Between Sizes And Variants

You can purchase the Roborock E4 with a mop attachment and water tank kit to help clear wet messes, similar to the Roborock S5. However, we don't currently test the effectiveness of this feature.

Compared To Other Vacuums

The Roborock E4 is a robot vacuum with decent performance. It's similar in many ways to the Roborock S4 and Roborock S5, but it lacks their LIDAR navigation system, which uses a laser to draw a more accurate, precise image of the area they're cleaning. You also can't set up virtual room boundaries in the E4's companion app. It has a decently-sized dirt compartment and outstanding battery life, but it also has quite a few parts that require regular maintenance or even replacement. It also struggles with clearing small and large debris on carpeted floors. If you're looking for more options, take a look at our list of recommendations of the best robot vacuums, the best robot vacuums for pet hair, and the best vacuums for hardwood.

Roborock S4

The Roborock E4 is a better overall robot vacuum than the Roborock S4. The E4 delivers stronger performance on all surface types, especially high-pile carpet, and has a slightly larger dirt compartment. However, the S4 has a shorter recharge time as well as a LIDAR navigation system that creates a more efficient cleaning path. You can also set up virtual boundary markers in its companion app.

Roborock S5

The Roborock E4 and Roborock S5 are fairly evenly-matched robot vacuums, though the E4 holds a slight advantage. The E4 has a larger dirt compartment, a lighter construction, and superior performance on all surface types. That said, the S5 has a LIDAR navigation system that allows for more efficient cleaning patterns. The S5 comes with a mop attachment for cleaning wet messes while such a feature is an optional add-on for the E4, though we don't currently have a test to measure the effectiveness of either.

Roborock S6

The Roborock S6 and Roborock E4 perform very similarly overall. The E4 is slightly more compact, easier to carry, and does a little bit better on high-pile carpet. Meanwhile, the S6 features a sturdier design, a more advanced LIDAR navigation system, and superior maneuverability. The S6 features a mop attachment to clean up wet messes while a mopping kit is available for the E4, though we don't currently test the effectiveness of either feature. 

iRobot Roomba 675

The Roborock E4 is a better overall vacuum than the iRobot Roomba 675. The Roborock performs significantly better on all surface types, has a larger dirt compartment, and has longer maximum battery life. It also has a broader range of automation options, like the remote piloting feature in its companion app and efficient smart pathing. Meanwhile, the Roomba is lighter and charges faster.

iRobot Roomba 960

The Roborock E4 is a better all-around robot vacuum than the iRobot Roomba 960. The Roborock is more effective on all surface types, slightly easier to maintain, and comes with a bigger dirt compartment. It also lasts much longer off of a single charge and offers a remote piloting function in its companion app. The iRobot charges much faster and does a better job of dealing with obstructions like power cords and rug tassels, however.

ONSON GOOVI F007 Robot Vacuum

The Roborock E4 is a significantly better performing robot vacuum than the ONSON GOOVI F007 Robot Vacuum. The Roborock is better-built, easier to maintain, and has fewer recurring costs. It also has a better performance on all surface types and it's more maneuverable.

bObsweep Bob Pro

The Roborock E4 is a better overall robot vacuum than the bObsweep Bob Pro. The Roborock is better-built, easier to maintain, and has a larger dirt compartment as well as an allergen-trapping HEPA filter. It also clears debris more effectively on all surfaces and doesn't struggle at all with pet hair. Conversely, the bObsweep is a little smaller and comes with a remote controller.

Eureka Groove

The Roborock E4 is a much better overall robot vacuum than the Eureka Groove. The Roborock is better-built, cleans much more thoroughly across all surface types, and maneuvers more efficiently. It also has a longer battery life while taking less time to charge. Meanwhile, the Eureka is a little bit lighter and takes up fractionally less space.

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