Roborock S4 Max Vacuum Review

Tested using Methodology v0.8
Reviewed Feb 25, 2021 at 08:59 am
Roborock S4 Max Picture
8.0
Bare Floor
6.1
Low-Pile Carpet
6.8
High-Pile Carpet
7.6
Pets
6.1
Stairs
5.8
Cars
Vacuum Type
Robot
Bagless
Yes
Cordless
Yes
Anti-Allergy Filter (HEPA)
Yes

The Roborock S4 Max is a well-built robot vacuum. It has a similar design to the Roborock S4, but unlike that model, it can maneuver on high-pile carpets. It delivers excellent performance on bare floors and picks up a good amount of pet hair from carpets as well. It's very good at maneuvering itself, as it creates and saves a map of your home and has a smart pathing feature. The companion app offers a suite of advanced automation features, like the ability to set virtual boundary markers and create cleaning schedules for individual rooms. Unfortunately, like most robot vacuums, it incurs a lot of recurring costs and has demanding maintenance needs.

Our Verdict

8.0 Bare Floor

The Roborock S4 Max is excellent for bare floors. It easily clears pet hair and most large and small debris. It moves in an efficient pattern, and its dirt compartment is a decent size. Unfortunately, it incurs quite a few recurring costs and isn't easy to maintain, but on the plus side, it has a great build quality.

Pros
  • Clears debris like rice and cereal.
  • Amazing battery life.
  • Sucks up most pet hair.
Cons
  • High recurring costs and demanding maintenance needs.
6.1 Low-Pile Carpet

The Roborock S4 Max is mediocre for low-pile carpets. It picks up a good amount of pet hair but struggles with fine debris like baking soda. It also incurs quite a few recurring costs and has demanding maintenance needs, but on the plus side, it's a very well-built vacuum.

Pros
  • Automatically increases suction power on carpets.
  • Sucks up most pet hair.
Cons
  • High recurring costs and demanding maintenance needs.
  • Struggles to clear debris.
6.8 High-Pile Carpet

The Roborock S4 Max is alright for high-pile carpets. It can climb onto carpets and maneuver itself on them. It clears a good amount of pet hair but struggles with large and small debris when its dirt compartment is partially full. The dirt compartment is a decent size, but it incurs quite a few recurring costs and has several parts that need regular maintenance.

Pros
  • Automatically increases suction power on carpets.
  • Amazing battery life.
  • Sucks up most pet hair.
Cons
  • High recurring costs and demanding maintenance needs.
  • Struggles to clear debris.
  • Performance drops as dirt compartment fills.
7.6 Pets

The Roborock S4 Max is a good choice for cleaning up pet hair. It clears most pet hair from any surface type and is equipped with an allergen-trapping HEPA filter. The brushroll is removable, which makes it easier to clear any tangled hair. It incurs high recurring costs and has demanding maintenance needs, but it has an excellent build quality.

Pros
  • Amazing battery life.
  • Sucks up most pet hair.
  • Equipped with allergen-trapping HEPA filter.
Cons
  • High recurring costs and demanding maintenance needs.
6.1 Stairs

The Roborock S4 Max isn't designed to be used on stairs.

5.8 Cars

The Roborock S4 Max isn't designed for cleaning car interiors.

  • 8.0 Bare Floor
  • 6.1 Low-Pile Carpet
  • 6.8 High-Pile Carpet
  • 7.6 Pets
  • 6.1 Stairs
  • 5.8 Cars
  1. Updated Feb 25, 2021: Review published.
  2. Updated Feb 22, 2021: Early access published.

Test Results

perceptual testing image
Design
8.0
Design
Build Quality

The Roborock S4 Max has very good build quality. It's made of sturdy-feeling hard plastic and has a matte finish, unlike the glossy-topped Roborock S5 and Roborock S6. The wheels are made of rubber and feel durable. However, the dust bin feels like it could break if dropped.

The top of the vacuum has a cover you can lift to access the dirt compartment. There's a Wi-Fi indicator light under the cover as well. Also on top are two buttons you can use to operate it without an internet connection. The laser navigation sensors are located on a small raised cylinder in the middle.

5.5
Design
User Maintenance

The Roborock S4 Max is a bit hard to maintain since it has quite a few parts that you need to take out and clean regularly.

  • Brushroll: Should be cleaned once a week. Remove by taking off the brushroll guard and pulling it out. You can take off the bearings to clear tangled hair. There's a tool included to help with this, but it's not very effective.
  • Side brush: Once a month, use a screwdriver to take it out of the vacuum and clean off any tangled hair.
  • Dirt compartment: The dirt compartment is small, so it needs to be emptied frequently. Luckily, it's very easy to remove by lifting the cover on top of the vacuum. Debris can spill out of it during this step, so be careful, especially if it's really full. It can be emptied over a garbage can or washed with water as needed.
  • HEPA filter: Should be cleaned every two weeks. To access the filter, you need to take out the dirt compartment first, and then unclip it.
  • Caster wheel: Should be cleaned once per month. You can pull it out of the socket, but it requires a lot of force and you may need to use pliers.
  • Sensor: The sensors and charging contacts on the vacuum should be dusted with a dry cloth about once a month.

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

The Roborock S4 Max has a few parts that need to be replaced regularly, so like many robot vacuums, it incurs fairly high recurring costs.

  • Brushroll: Replace every six to 12 months.
  • Side brush: Replace every three to six months.
  • HEPA filter: Replace every three to six months.

The vacuum's companion app has a "Maintenance" tab that allows you to see roughly how many hours of cleaning time are left until you should replace each part, based on your actual use of the vacuum.

8.9
Design
Storing
Height
3.98" (10.1 cm)
Width
13.90" (35.3 cm)
Depth
16.46" (41.8 cm)
Cord Storing/Management
Not Needed
On-Board Tool Storage
Not needed
Vacuum Rack/Station
Yes

This vacuum is very easy to store since it comes with a compact, low-profile charging station. However, the vacuum tends to push the station when it tries to dock itself, which can be a bit annoying. Luckily, the station comes with double-sided tape on the bottom, which you can use to prevent it from sliding around.

6.8
Design
Dirt Compartment
Dirt Compartment Volume
0.11 gal (0.42 L)
Full Dirt Compartment Indicator
Yes
Bag Included
No Bag Needed

The Roborock S4 Max's dirt compartment is a decent size for a robot vacuum. It holds the same volume as the Roborock S4's, although it's advertised as having a slightly bigger capacity. The app notifies you when it's full, and it's easy to access. You should remove it very carefully because it has an opening that debris can spill out of.

Design
In The Box

  • Roborock S4 Max vacuum
  • Charging dock
  • Charging cable
  • 2x HEPA filters
  • Brushroll
  • Brush guard
  • Main brush cleaning tool
  • User guide

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

The Roborock S4 Max has an unlimited range as long as it still has battery and space left in its dirt compartment, but it can't go up or down stairs.

8.0
Design
Portability
Total Weight
7.21 lbs (3.27 kg)
Weight In Hand
0.00 lbs (0.00 kg)
Carrying handle
No

This vacuum has great portability. It's on the heavier side for a robot vacuum, but it's still relatively light and compact, so it shouldn't be too much of an issue to carry it from floor to floor. There's no carrying handle, however.

8.8
Design
Battery
Minimum Battery Life
112 min
Maximum Battery Life
207 min
Recharge Time
300 min
Recharge Dock
Yes
Battery Life Indicator
Yes
Removable Batteries
No

The Roborock S4 Max has amazing battery performance. Set to its most powerful suction setting, 'Max' mode, it lasts for nearly an hour and a half. On the lowest setting 'Quiet' mode, it provides up to three and a half hours of continuous cleaning. However, it takes nearly five hours to recharge, which is quite long.

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 S4 Max robot vacuum has some extra features. There are four different power suction modes, 'Quiet', 'Normal', 'Turbo', and 'Max'. There's also 'Carpet Mode' which allows the vacuum to automatically detect when it's cleaning carpet and increase the suction power mode to 'Max'. This feature is turned on by default, but you can turn it off in the app.

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 S4 Max is equipped with a silicone side brush that pushes debris into the path of the vacuum. It also comes with a brush cleaning tool that has bristles and a small hook blade to cut away any tangled hair.

Design
Alternative Configuration

The Roborock S4 Max doesn't have an alternative configuration.

Performance
9.0
Performance
Bare Floor (Hardwood, Laminate, Tiles)
Pet Hair at 0 gal (0L)
100%
Large Debris at 0 gal (0L)
99%
Large Debris at 0.07 gal (0.25L)
76%
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)
99%
Small Debris at 0.07 gal (0.25L)
97%
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 S4 Max has fantastic performance on bare floors. It easily clears pet hair and picks up smaller debris like rice, even when its dirt compartment is partially full. It can suck up bulky material like cereal with no issue when its dirt compartment is empty, but once it's about half full, some cereal gets stuck between the brushroll and the dirt compartment, or trapped under the vacuum and dragged around.

5.5
Performance
Low-Pile Carpet
Pet Hair at 0 gal (0L)
78%
Large Debris at 0 gal (0L)
66%
Large Debris at 0.07 gal (0.25L)
65%
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)
26%
Small Debris at 0.07 gal (0.25L)
21%
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)
0%
Setting Used "Max"

The Roborock S4 Max has a sub-par performance on low-pile carpets. It picks up some pet hair and larger debris like sand but struggles with fine debris like baking soda. Consider the Xiaomi Mi Robot Vacuum if you're looking for a vacuum that's more effective on this surface type.

6.7
Performance
High-Pile Carpet
Pet Hair at 0 gal (0L)
85%
Large Debris at 0 gal (0L)
57%
Large Debris at 0.07 gal (0.25L)
37%
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)
21%
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 S4 Max is okay on high-pile carpets. Unlike the Roborock S4, it can climb onto them and move around. It sucks up most pet hair but struggles with debris, and its performance drops sharply when the dirt compartment is partially full.

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

The Roborock S4 Max maneuvers itself very well. It uses its laser navigation system to clean in an organized pattern and adapts its route after each cleaning job to become more efficient. It's small enough to go under low furniture like a couch and cleans around obstacles like table legs. If you have 'Carpet Mode' on, you can hear its suction power increase when it climbs onto a carpet or rug. Unfortunately, it tends to get stuck on rugs with tassels and electric cords, and you may need to physically remove it before it can continue cleaning.

Automation
8.7
Automation
Automation (Robot Vacuum)
Remote Controller
Yes (App only)
Automatic Bag Emptying
No
Automatic Recharging
Yes
Schedule Programming
Yes
Boundary Markers
Yes
Random Pathing
No
Smart Pathing
Yes
App Name
Roborock

The Roborock S4 Max has excellent automation features. It creates and saves a map of your home that you can see in the Roborock app. Then you can use the app to set virtual boundaries and 'no-go zones' to keep the vacuum out of certain areas. You can also designate a specific area for it to spot clean, remote pilot the vacuum, and use the 'pin and go' feature to send it to a particular place on the map. The app also allows you to change the suction power settings and set up individual cleaning schedules for different rooms. It shows you your cleaning history and maintenance schedule. If the battery dies while it's cleaning a room, it will calculate how long it needs to charge to finish the job.

If you want to use it without an internet connection, you can use the two buttons on top. Press the power button to start or stop a cleaning session, and press and hold to turn the vacuum on and off. Pressing the home button sends it back to its dock, while pressing and holding tells it to do a spot-clean.

Differences Between Sizes And Variants

The Roborock S4 Max is available in one color, 'Black'. You can see the label for the unit we tested here. It's quite similar in design to the Roborock S4, which we also tested.

If you come across another variant or your model is different, please let us know in the discussions so we can update our review.

Compared To Other Vacuums

The Roborock S4 Max is a well-built robot vacuum. Like the Roborock S4, it has advanced automation features and performs best on bare floors. The Max has a longer maximum battery life, and unlike the S4, it can climb onto high-pile carpets and does an okay job of cleaning them. The S4 has a much better performance on low-pile carpets, but neither model is the best choice for cleaning carpets. If you want to see more options, see our lists of best robot vacuums, the best robot vacuums for carpets, and the best robot vacuums for pet hair.

Roborock S4

The Roborock S4 Max and the Roborock S4 are very similarly-designed vacuums, and you may prefer either one, depending on what surface types you have in your home. The Max can climb onto and clean high-pile carpets. It has a longer maximum battery life and it's also lighter, which makes it more portable. On the other hand, the S4 has a much better performance on low-pile carpets and picks up more debris like cereal from bare floors when its dirt compartment is partially full.

Roborock S6

The Roborock S6 is a better vacuum than the Roborock S4 Max for most uses. The S6 has a significantly better performance on bare floors and low-pile carpets. It doesn't clear as much larger debris from high-pile carpets, but picks up more pet hair from that surface type and doesn't lose as much suction as its dirt compartment fills. On the other hand, the Max is a bit smaller and lighter, which makes it more portable.

Roborock E4

The Roborock E4 is a better vacuum than the Roborock S4 Max. They have very similar battery performance, maintenance needs, and build quality, but the E4 delivers better performance on every surface type. It's also a bit lighter and its dirt compartment is slightly bigger. However, the Max has more advanced automation features. It maps your home and allows you to create virtual boundaries and individual cleaning schedules for different rooms.

Roborock S5

The Roborock S5 is a better vacuum than the Roborock S4 Max. They have a very similar design and features, but the S5 delivers better performance on bare floors and low-pile carpets. It's also lighter and recharges much more quickly. On the other hand, the Max has a better performance on high-pile carpets, as it clears more debris from that surface type when its dirt compartment is empty.

Roborock S6 MaxV

The Roborock S6 MaxV and Roborock S4 Max each have their own advantages, so one may suit you better than the other depending on your needs. The S6 MaxV is better-built, delivers superior performance in regards to clearing larger debris like sand from carpets, and has a mopping attachment for clearing stuck-on debris on bare floors, though we don't currently test the latter. Meanwhile, the S4 Max is notably better when it comes to cleairng pet hair from carpeted floors and has a longer battery life, though it does take longer to recharge.

Wyze Robot Vacuum

The Wyze Robot Vacuum is slightly better than the Roborock S4 Max. The Wyze has fewer parts that require regular maintenance and delivers superior performance on bare floors as well as low and high-pile carpet. While the Wyze charges a lot faster, the Roborock has a longer maximum runtime, but it's worth mentioning that this can vary in the real world. The Roborock also maneuvers itself more effectively and has a larger dirt compartment.

Roborock S7

The Roborock S4 Max and Roborock S7 have different advantages, so one may suit you better than the other depending on your needs. The S4 Max has a larger dirt compartment and does a better job of clearing pet hair from all surface types. Conversely, the S7 delivers better overall debris-cleaning performance on bare floors and carpets. It also feels better-built, takes less time to recharge, and comes with a mopping attachment, though we don't currently test the latter.

Xiaomi Mi Robot Vacuum

The Roborock S4 Max is better than the Xiaomi Mi Robot Vacuum. The Roborock is better-built, more portable, has a longer maximum runtime, maneuvers itself more effectively, and can clear debris on high-pile carpet. You can also use the 'Mi Home' companion app to set up virtual boundary markers, unlike the Xiaomi. Meanwhile, the Xiaomi performs notably better on low-pile carpets and takes less time to recharge.

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