When I look at robotic lawn mowers, I always end up at the same question: will it handle a real garden, or just a perfect test patch?
The ANTHBOT M9 is built around solving the two biggest headaches with multi-zone robotic mowing.
- Navigation that stays accurate when you need to cross paths, make turns, and work across separate areas
- Setup that does not involve laying boundary wires all over your lawn
The M9 tries to do this using RTK for centimeter-level positioning, plus dual 150-degree cameras and AI obstacle avoidance as a safety net. It also offers app-based height control (no dial on top), multi-zone scheduling, and a pretty interesting “edge cutting” system that can overlap onto the lawn edge you define.
I put it through a practical setup and navigation challenge across multiple zones and a narrow channel. The goal was simple: could it really maintain the route, cut cleanly, and avoid obstacles without me babysitting it?
What the ANTHBOT M9 is built for
The M9 sits in the “M range” of ANTHBOT robotic mowers, and it is aimed at bigger gardens.
Specifically, this model is rated for lawns up to 1,000 square meters. In my case I had roughly:
- ~450 square meters on the back lawn
- ~15 to 20 square meters on a smaller middle lawn
- ~100 square meters on the front lawn
So yes, plenty of capacity. But the more important point for me was how well it could transition between zones and stay on the planned paths.
Key hardware idea: It is an RTK guided mower with dual cameras for AI vision and obstacle avoidance.
Box contents and what you need to get started
One of the reasons I like reviewing guided robotic mowers is that you can generally set them up without “wire work.” The M9 continues that theme.
In the kit, you typically get:
- The mower
- A charging station
- Power leads for the charging station
- Power and connection leads for the RTK station (included on this model)
- RTK poles and a ground mount for installation
- A quick start guide and a more detailed user guide
- Pegs and screws for anchoring the charging station and any running wire if needed
- A screwdriver (handy during battery access and setup)
Charging station placement note: Many people want the station on the lawn, but I do not. I find the grass growing up around it looks messy.
That said, the M9 does include a mode that can tidy up grass around the charging area after mowing. And because it is RTK guided, you can place the station away from the main lawn as long as you have a workable path between charging and mowing zones.
M9 specifications that matter in real life
Cutting width and blade setup
The M9 has a 20 cm cutting deck and uses a multi-blade cutting system. In my hands-on inspection, the deck uses five blades, which is a solid practical width for keeping grass looking sharp without requiring constant mowing passes.
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Cut height control from the app
This is one of my favorite features of the M9.
Many robotic mowers use a physical dial or manual adjustment. The M9 lets you adjust height from the app.
The range is:
- 30 mm minimum
- 70 mm maximum
Why that matters: you can create zones with different turf heights. For example, your main lawn might be cut lower while a decorative area stays taller for a slightly more “managed” look.
Hidden win: no more reaching down to adjust a mower you have already scheduled and mapped.
Battery access you can actually maintain
Another practical detail: the battery is user-replaceable.
The battery compartment is accessible and designed so you can remove and replace the battery yourself using four screws. The model I tested uses a relatively large battery capacity (described as a 5 amp-hour pack for this size class).
This matters because robotic mower batteries degrade over time. If the battery is buried and non-serviceable, you are stuck with expensive returns. The M9 is built like it expects you to maintain it.
Inclines and traction
The M9 handles slopes up to 45% incline in its designed spec.
In plain terms: it is capable enough for most typical UK garden gradients, but do not assume it is magic. Measure your slopes if you have steep areas.
It is also worth noting it is two-wheel drive rather than a four-wheel drive system. During testing it tackled a ramp without drama, but if your lawn is full of roots, debris, or uneven traction challenges, a four-wheel drive model may be worth considering.
RTK vs camera backup: how guidance is handled
To understand what makes the M9 impressive, you need to understand how it navigates.
This is an RTK guided mower. That means it uses satellite signals to get extremely accurate positioning. The RTK station helps provide that precision so the mower can follow systematic mowing lines and navigate between different zones and paths.
On top of that, the M9 also has dual cameras with a 150-degree field of view. The camera and AI vision are not just about obstacle detection.
- The camera helps with navigation support
- The camera performs obstacle avoidance
- If RTK signal is lost, the camera can take over until RTK returns
This is a big deal because older RTK mowers could stop when trees blocked the signal. The M9 is designed to keep mowing in a more resilient way.
Can RTK station placement be flexible?
During testing, I went through the practical concern people always ask me:
- Will it still work if the mower has no direct line of sight to the RTK station?
My experience was yes. Even when I did not have direct line of sight (like around the front of the house), the RTK light stayed solid and GPS guidance remained stable. The key is that the RTK station has to be able to “see” the sky. The station and the robot both need a clear view of satellites above, not a direct optical line of sight between them.
Net RTK: the promise and the setup reality
Here is where it gets interesting.
ANTHBOT describes an option called net RTK. The idea is that you do not need to install and use a physical RTK base station. Instead, the RTK correction data can be delivered via a network connection such as:
- Wi-Fi
- 4G (through the built-in SIM service)
It also prioritizes Wi-Fi when available, and switches to 4G if Wi-Fi drops.
There are real-world benefits to net RTK:
- Fewer installations
- No extra hardware in your garden
- Cleaner setup and potentially easier relocation
In my test, net RTK was not available at first. I tried setting up without the RTK station. The app would not proceed without detecting the RTK station.
I logged a ticket with ANTHBOT support, and the reason was clear: this was an early pre-release unit in the UK, and net RTK functionality was not yet enabled by firmware. ANTHBOT indicated a firmware update would push later (April 2026 in the UK and other markets).
So, the result was that I could not validate net RTK yet during this testing window. I could fully validate RTK station guidance. I will revisit net RTK after the firmware update enables it, because that setup style would be a genuine leap for many households.
App control and multi-zone mapping: how setup works
If you are currently put off by robotic mowing because you think setup is complicated, this is where the M9 tries to change your mind.
The M9 uses an app-based process to:
- Add the mower to your account (including ownership binding)
- Connect to Wi-Fi (supporting both 2.4 GHz and 5 GHz)
- Create mowing maps and zones
- Define channels between zones
- Optional: auto-map zones (more on that below)
Account binding and security
When you bind the device, the mower is linked to your account. That means it cannot be added to another account without your permission. This also supports sharing within a household, but it remains controlled through the app.
Mapping without boundary wires
This is the part I personally care about most.
The guided approach makes mapping far more practical than “days of boundary wire work.” When you have multiple lawns or need the mower to cross from a path to several garden areas, wires become a long, fiddly job.
With the M9, you:
- Start the mapping flow in the app
- Guide the mower around the area you want
- Let the system build the map
- Create additional zones and channels between them
Manual mapping vs auto mapping
The M9 supports both manual mapping and an auto mapping function.
In my case, I manually mapped one area first. Then I used auto mapping for the other zones to test how well it handles boundaries and navigation transitions automatically.
My take: auto mapping is great if you want speed. But I prefer manual mapping because I can get closer to edges and generally produce a cleaner result. If you only map once, manual effort is often worth it.
Also, the M9 can create channels between the charging station and zones. During my setup, the channels between areas appeared on the map and I did not have to manually draw every connection.
Charging station clearance and docking performance
ANTHBOT recommends around 2 meters of clearance each side of the charging station for best results.
I did not have exact clearance in my setup because I wanted the station on my path, away from the main lawn. I was also deliberately testing whether docking would work reliably with a tighter arrangement.
The good news: docking worked very well. The mower returned to the charging station and appeared happy with navigation precision even under less-than-ideal “clearance” conditions.
Edge cutting: one of the most distinctive features
Most robotic mowers either stay inside defined boundaries or trim edges as a basic “go around and close the gaps” routine. The M9 gives you much more control.
It includes an edge cutting routine, and more importantly, it lets you define overlap so the mower can cut over onto a level surface beyond the mapped boundary.
In my test, I had a path that was level with the lawn surface. After mapping, I set up an edge so the mower would overlap onto that edge area.
Inside the app I could choose overlap amount (examples included 5 cm, 10 cm, or 15 cm). I selected a larger overlap because I wanted the edge to be genuinely clean and reduce the need for hand trimming.
Why this matters: If you want a crisp lawn line without you carrying a strimmer around the edges, edge overlap control can be a game-changer.
Once the edge plan is in place, the mower keeps working the route with the edge cut (“Edge” tab) selected—aimed at a cleaner finish along the boundary.
I also noticed a neat behavior: when the edge routine ran, the mower adjusted its movement so it went up onto the lawn edge rather than stopping short.
I set up a multi-zone test that tried to stress the mower where it would normally be most likely to lose confidence:
- Crossing from the main lawn across a feature-like bridge
- Traveling down a narrow path
- Managing a small ramp to reach a front zone
- Moving between zones and returning home to charge
On the navigation side, the M9 performed better than most consumer expectations.
The M9 is described as being capable of minimum spaces of 65 cm between obstacles. In my setup, that narrow channel requirement was exactly what I wanted to validate.
When it left the mapped zone, it found the path connection, stayed aligned, and reached the second lawn without wandering.
Ramp handling
When it moved up the small ramp to the front lawn, it did so cleanly.
I previously tested an RTK-free LiDAR model in the same general area, and that one struggled a little with steps or ramp transitions. With the RTK guided M9, the ramp pass worked smoothly.
That difference made me feel more confident in the M9’s multi-zone and movement planning, especially when changing elevation or crossing from one area to another.
Obstacle avoidance and AI vision: what it detected
This is where the M9’s camera system earns its keep.
During testing I deliberately placed obstacles in the mowing path, including:
- A shoe
- A small ball
- A frame-like object that could represent furniture or a trampoline base area
The mower detected these objects and adjusted behavior. It would recognize the obstacle, then it would avoid it and return to mowing the missed strip later.
That “do not panic, just resume later” approach matters. It prevents you from having to restart the whole map when an object is moved or briefly placed.
In multiple attempts, it was also responsive even when the obstacle was not present for an extended time. That is a big deal for real-life scenarios like pets or children’s toys being carried onto the lawn.
There are also lift and tilt sensors, so if the mower is lifted, it will shut off.
One detail I appreciated: shadows did not seem to confuse the obstacle avoidance. The cameras understand visual context and treat shadows differently from physical objects.
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Pros and cons: my honest take on the ANTHBOT M9
ANTHBOT has different guidance styles across its M range. The M9 is RTK guided. There is also an M5 in the lineup that uses LiDAR.
Here is the practical way I think about it:
- RTK is best when you can place the RTK station with good satellite visibility. If your garden has limited sky view (trees), RTK may become less stable.
- LiDAR is best when satellite visibility is consistently poor. LiDAR builds guidance locally using laser scanning and does not rely on external satellite positioning.
- Some future mowers may combine multiple navigation systems (camera, RTK, and LiDAR) for maximum resilience.
My personal preference is RTK because I feel it follows the planned routes more confidently. But if your garden is heavily treed, LiDAR may be the safer bet.
Net RTK update: what to expect next
Because I tested an early pre-release unit, net RTK was not available when I attempted to configure it without a physical RTK station.
ANTHBOT explained that a firmware update later in April 2026 for the UK will enable net RTK. After that, the intended experience is straightforward: you could disconnect the RTK base station and deliver RTK correction data over Wi-Fi or 4G directly to the mower.
I will revisit the net RTK setup later once the firmware is live. That is the feature I want to validate because it has the potential to remove one of the last “hardware installation” steps for guided mowing.
Robotic Mower Comparison: M5 vs. M5 LiDAR vs. M9
| Feature | M5 | M5 LiDAR | M9 |
|---|---|---|---|
| Recommended Lawn Size | 500㎡ (1/8 Acre) | 500㎡ (1/8 Acre) | 1000㎡ (1/4 Acre) |
| Positioning System | Full-Band RTK + Dual Vision | 360° LiDAR + Dual Vision | Full-Band RTK + Dual Vision |
| Object Detection | 150° HDR AI Vision | 150° HDR AI Vision + LiDAR | 150° HDR AI Vision |
| Cutting Height | 30mm – 70mm | 30mm – 70mm | 30mm – 70mm |
| Multi-zone Management | 20 Zones | 20 Zones | 30 Zones |
| Battery Capacity | 2.5Ah (45Wh) | 2.5Ah (45Wh) | 5Ah (90Wh) |
| Mowing Time per Charge | 40 Minutes | 40 Minutes | 90 Minutes |
| Charging Time | 60 Minutes | 60 Minutes | 90 Minutes |
Final verdict: should you consider the ANTHBOT M9?
If your garden is more than one simple rectangle, and you want to avoid boundary wire installation, the ANTHBOT M9 is one of the more compelling options.
It delivered accurate multi-zone navigation through narrow passages and a ramp transition. The camera AI obstacle avoidance worked well and felt responsive. And the app-based height control plus edge overlap behavior gave it a more “professional lawn finish” feel than basic robotic mowing routines.
The biggest uncertainty for buyers at the moment is net RTK availability depending on firmware timing and your configuration. If you want the simplest setup with no RTK base station, make sure you confirm that your unit has net RTK enabled or plan for a firmware update.
But if you are comfortable with a physical RTK base station, the core experience is already strong: set up zones, trust the RTK guidance, and let the mower do the tedious work.
Purchase the ANTHBOT M9 direct from ANTHBOT and SAVE 10%
Use Discount Code: ABAFF10 (Affiliate Link)
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DE: https://anthbot-international.pxf.io/n4XJP9
EU: https://anthbot-international.pxf.io/qWzXmN
FAQ
Does the ANTHBOT M9 need boundary wires?
No. The M9 is guided using RTK positioning (and camera AI assistance), so you avoid burying boundary wires around your lawn. You define zones and channels in the app instead.
What lawn size is the M9 designed for?
The M9 is rated for lawns up to about 1,000 square meters, which covers my multi-zone test setup comfortably.
Can it mow across narrow paths?
Yes. The M9 is described as capable of minimum passage widths of 65 cm. In my setup it successfully navigated a narrow channel between zones while keeping alignment.
What happens if the RTK signal is blocked by trees?
The dual cameras and AI vision can take over if RTK signal is lost, guiding the mower back into systematic mowing until RTK returns. This is designed to avoid the “stop dead” behavior seen on older RTK-only systems.
Does the M9 handle different grass heights on different zones?
Yes. Cutting height is adjustable from the app between 30 mm and 70 mm, and you can apply different settings per zone.
Can it do edge cutting and overlap onto the lawn edge?
Yes. The M9 includes an edge cutting routine where you can define how far it overlaps onto an edge area, such as a level path that meets the lawn.
Is net RTK available without the RTK base station?
It should be, but during my testing net RTK was not enabled on the unit because a firmware update was required. ANTHBOT indicated that a later firmware update will enable net RTK so the mower can receive RTK data over Wi-Fi or 4G.
What obstacle types can it detect?
In testing it detected objects such as shoes, balls, and frame-like items, and it avoided them responsively. The camera system is designed to recognize many object types rather than just generic “obstacles.”
As a seasoned expert in the field of garden power tools, I have dedicated over a decade to working with and reviewing a wide variety of lawn mowers. My extensive experience has allowed me to gain a deep understanding of the benefits and limitations of different types of mowers and garden tools.
Over the years, I have honed my skills in writing informative articles and creating helpful videos for various blogs and publications. This has given me the ability to not only recognise what makes a good lawn mower, but also to help you choose the perfect garden tool for your specific needs and requirements.
With my wealth of knowledge and expertise, I am confident that I can provide you with valuable insights and recommendations when it comes to selecting the right lawn mower for your lawn. So, whether you're looking for a battery cordless, electric, petrol, or robotic mower, you can trust in my expertise to guide you towards the best option for your garden.
