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.
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.
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.
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.
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.
The Roborock E4 is a robot vacuum that isn't suitable for cleaning stairs.
The Roborock E4 is a robot vacuum that isn't meant to clean the inside of cars.
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.
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.
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.
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.
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.
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.
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.
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%.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.