Ryobi OLM1833B 18V ONE+ Cordless 33cm Lawnmower (Body Only), Anthracite/Green

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Rated 4.78 out of 5 based on 9 customer ratings
(9 customer reviews)

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Ryobi OLM1833B 18V ONE+ Cordless 33cm Lawnmower (Body Only), Anthracite/Green
£139.99
£177.99
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Amazon.co.uk
3 new from £139.99, 5 used from £114.79
Ryobi One+ Cordless 33cm Lawnmower 18v [OLM1833B]
£199.75
in stock
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Amazon price updated: June 20, 2025 8:09 am
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June 18, 2025
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Last updated on June 20, 2025 8:09 am
  • 33cm (13†) cutting path designed for easy manoeuvrability around the garden
  • Cordless Battery convenience – no potentially dangerous mains cable or messy petrol
  • Mow right to the perimeter with easy edge grass Comb feature – no need to finish it off with a grass trimmer
  • 5-Levels of cutting height (25-65mm) and 3-position telescopic handle
  • Part of the Ryobi one system – over 100 tools powered by one battery
  • Autonomy: Up to 250 m² with an 18V ONE 5.0 Ah battery
  • Mulching capable: Yes
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9 reviews for Ryobi OLM1833B 18V ONE+ Cordless 33cm Lawnmower (Body Only), Anthracite/Green

  1. Rated 5 out of 5

    Starry night

    Well. On the whole I’m very, very impressed with this amazingly light little mower, which runs on the same battery system as a wide range of other tools (both indoor and outdoor). The mower is supplied without battery and charger – and these do add a good chunk to the cost – but we already owned several batteries and the fast charger for this series, so didn’t need to buy anything new/extra in order to run this. The only assembly needed for this relates to attaching the three pieces of the handle, which is pretty straightforward. Although the diagrammatic instructions show fitting it, this came with the mulching plug pre-installed (needs to be removed before the grass collection bag can be used). The grass collection bag has a cloth base, so is collapsible for storage, whilst the handle of the mower can be folded by simply unscrewing the two large side screws. For storage purposes, this is great, taking a comparatively small amount of space whilst the grass collection bag is reasonably generous.

    This works well. It is unbelievably light compared to a petrol mower. More like pushing a lightweight stroller or a child’s toy than a lawnmower (although there is a bit of vibration through the arms). My Dad at 72 hasn’t used a mower on anything other than self-drive settings in years, but he loved this push mower: it’s so light that pushing this is less effort than steering an SD petrol mower. No fumes. No need to faff about with engine oil. Comparatively, this is really quiet in use.

    We’ve only used this with 5.0ah batteries. When well-maintained, a fully charged battery is easily capable of coping with a couple of good sized lawns (over 2000′ squared/ a good couple of hundred meters). If grass has started to get a bit out of hand, this still cuts well, but with the 5.0Ah battery you can hear it placing strain on the power supply and the battery drains significantly faster. The small size and light weight make this very easy to manoeuvre, and this goes in next to obstacles (such as trees, bird feeders, and lawn edges) really well.

    The only issue we’ve had with this relates to the cutting height adjustment ‘lever’. This is wholly plastic, and works by means of pulling a plastic handle out, moving it side to side, and pushing it back in so that a little plastic peg slots in to one of 5 cutting height selection holes. The 5th hole – the one for the highest cut on grass – is not good. On this setting, the peg gets stuck. There doesn’t seem to be sufficient space between the lever and the wheel to disengage this once it has been set to this height. The handle on the lever really strains and feels as though it might break, with no sign of dislodging the peg. I ended up using the end of a flat head screwdriver and poking this down the side of the hole selector to extract the peg without placing undue pressure on the handle. Will be avoiding this setting in future.

    On paper this mower isn’t really suitable for our garden. We live out in the countryside and have a half acre plot – significantly more than the size for which this is recommended. However, our garden isn’t all lawned over one area each at the back/front, but over seven separate ‘zones’; is on a slope; and has walled areas and steps between every lawn. It’s really a series of smaller lawns rather than a big one. Until now, we’ve used petrol rather than electric mowers – the cabling needed for electric models is completely impractical in a large, tiered garden that’s prone to retaining water.

    Previously, it’s been quite hard going lugging a mower round between walled areas, up and down steps. To make matters more interesting, our soil is clay: prone to cracking deeply and developing odd lumps and bumps in dry weather; and waterlogging, then remaining boggy, when it rains. That this is light has not been astonishing, but this mower has surprised by proving easier to use over lumps and bumps caused by cracking lawns and ants’ nests (a constant battle in our garden!) than petrol mowers. The lighter weight doesn’t do anything to help restructure the lawn, but does enable this to glide over obstacles, instead of struggling and even getting stranded on them. This has also proved more practical in some respects when it comes to our water-retaining soil: this is so light that it can be used pretty much as soon as the soil is OK to walk on, whereas heavier mowers can start to sink/dig in to the ground if it’s not dried out below the surface. If we mow by using multiple batteries, or doing only a couple of lawns at a time, this lightweight battery mower works really well, even on a large garden.

    4.5/5

  2. Rated 5 out of 5

    Riccardo T.

    Tosaerba che fa egregiamente il suo lavoro. Un po’ “leggerino” quindi non adatto per impegni gravosi ma comunque ottimale per me avendo un giardino di 30mq. Fare attenzione alla capacità della batteria, io ne ho acquistata una da 4Ah ed ho visto che ha un’autonomia di 45 minuti. Dipende molto anche del l’altezza dell’erba da tagliare, ma con tagli regolari per il mio giardino ne consumo circa il 50%.

  3. Rated 5 out of 5

    D. WOOD

    Just clarifying for anyone who orders this that it does indeed come with a cutting blade, and you do not need to order one separately.

    The mower is very easy to put together. Just remember to pull out the plastic cutting diverter if you’re going to use the basket for grass trimmings.
    The instructions are a total waste of time but you’ll work it out.

  4. Rated 5 out of 5

    Meelis Kleinert

    OK.

  5. Rated 4 out of 5

    Steve

    I read lots of mixed reviews so thought I’d add to the confusion after buying one 🙂

    I only have a very small lawn and this lawnmower is fine. I’d like it to cut the grass a little shorter but I can live with the results. It’s very agile and lightweight and easy to store. It works with my 1.5AMP batteries I had when I purchased a Ryobi drill although it runs out out juice after 10-15 minutes but since I have two batteries I can get my small lawn done in one session. I imagine a larger capacity battery would solve this problem but for me, the point of buying Ryobi is that you don’t buy multiple batteries. I found the 1.5A battery lasted about 10-15 minutes of cutting.

    Someone mentioned poor build quality and I agree the handle seems rather flimsy – hasn’t failed yet but see why it’s a concern which I find unusual in a Ryobi product.

    Also someone mentioned “The mulcher” which is basically a big piece of plastic blocking the path of he cut grass into the collection bag. Even knowing this thing might be there, it must be noted the instructions aren’t crystal clear about how to remove this and I spent my first mow wondering why the grass box was empty.

    Overall though I was quite happy with this. Works with my other Ryobi tools (and batteries), gives a reasonable (if not great) cut and is very lightweight / portable / collapsible. I can however see why anyone seeking a closer cut or mowing a medium size or larger lawn may have been disappointed with this.

  6. Rated 5 out of 5

    Stormo

    Zusammenfassung:
    – Starke Leistung
    – kein Akku im Paket
    – kein Ladegerät im Paket
    – Reichweite hängt neben Akkukapazität von Feuchtigkeit und Rasenhöhe ab
    – Mein Test: Hoher, aber trockener Rasen, 6.0AH Akku (kein Ryobioriginal) –> ca. 200qm

    Los gehts!
    Mir wurde vor Kurzem Ryobi empfohlen und ich muss sagen, es wurde nicht übertrieben. Der Rasenmäher ist jetzt mein 4. Ryobi-Werkzeug und es kommen bestimmt noch welche hinzu.
    Aber zum Rasenmäher:
    Paket kam schneller als von Amazon angekündigt. Trotz Corona. Es war allerdings über amazon bei einem Händler bestellt.
    Ich habe das Paket ausgepackt und der Rasenmäher war, natürlich, nicht zusammengebaut. das kann man beim Versand auch schwer gewährleisten ;-). Im Paket sind der Rasenmäher und die Griffe sowie Schrauben zur Befestigung und ein Schutzschlüssel, ohne den der Mäher nicht angeht (Steckplatz beim Akkusteckplatz). Kein Akku und kein Ladegerät, aber das wusste ich schon.
    So stand ich nun vor den Stangen und habe erst mal eine Aufbauanleitung gesucht. Nicht gefunden. Aber der Zusammenbau war auch nicht schwer. Die Anleitung ist aber im Handbuch vorhanden. Dann auch schon Akku rein, Schutzschlüssel rein. Lief perfekt. Erstmal wieder aus und den Rasenmäher genauer ansehen… ganz schön klein. Aber ich habe ja auch keinen großen Rasen ca. 160 qm. Meine Frau meinte, mit diesem Spielzeug wird das nie was. Ich war zugegeben auch anfangs etwas skeptisch.
    Der Rasenmäher ist sehr einfach aufgebaut der Griff und dass Messer sind aus Metall. Der Rasenmäher selbst ist aus Kunststoff. Aber wenn man diesen genauer ansieht und anfasst merkt man schon, dass ist besserer Kunststoff und fühlt sich wertig an. Nun genug, ab auf den Rasen:
    Der Rasen war schon eine ganze Weile nicht geschnitten. Also erstmal die Höhe des Rasenmähers auf Stufe 4 von 5. Vorne am linken Rad kann man die Höhe einstellen. Es ist etwas hakelig. Aber nach kurzem Probieren die passende Höhe erreicht. Auf gehts. Hebel gezogen (in der Mitte vom Griff ist noch ein Sicherheitsknopf in gelb, den man gleichzeitig drücken muss) und los. Natürlich kein Antrieb, aber er ist ja auch leicht und mein Rasen ist schön eben. und ich muss sagen überraschend stark. Den Rasen ohne zu murren weggemäht. Auch die höhreren Stellen. Er zerkleinert das Gras gut und in den Fangkorb passt doch ganz gut was rein. Nach gut 20 Minuten war ich auch schon mit der kleinen Fläche fertig. Akku war noch nicht ganz lehr. Also noch mal auf Höhenstufe 2 runter und nur mulchen (also ohne Korb, Mulchteil ist auch dabei). Er fuhr noch ein wenig und ging dann aus. Akku leer. Geschätzt habe ich mit einem 6.0AH Akku 200 qm geschafft. Der Akku war voll geladen. Aber es war kein original Ryobi-Akku. Also 2. Akku rein (baugleicher Akku). Der Rest war ein Kinderspiel und der Rasen sieht sauber gemäht aus.
    Ob es bessere Akkumäher gibt… bestimmt. Aber i.d.R. dann auch teurer. Mit dem Preis-Leistungsverhältnis bin ich vollkommen zufrieden.

    Wichtig zu wissen die Akkulaufzeit hängt u.a. von der Grashöhe und der Schnitttiefe und der Feuchtigkeit des Rasens ab. Je höher der Rasen ist , desto schneller ist der akku leer. Je nasser der Rasen ist und damit schwerer… Akku schneller leer. 250 qm schafft der Mäher nur, wenn alles perfekt ist. Also ganz trocken und Rasen nicht zu hoch. Bei mir war mein Rasen schon sehr hoch, mehrere Wochen nicht gemäht, aber es war sehr trocken. Ich bin mit den 200 qm pro Akkuladung sehr zufrieden. Empfehlung von mir ist: Auf jeden Fall einen zweiten Akku bereit halten.

  7. Rated 4 out of 5

    Hardy Jean-Paul

    Très facile d’utilisation. Coupe très bien et si on utilise le sac (pas des plus grands) mais je n’ai jamais eu une autre tondeuse qui remplissait si bien son sac.
    Pour 250m2, il faut compter plus qu’une batterie de 5Ah.

  8. Rated 5 out of 5

    The Ledge

    My trusty old wheel driven petrol lawnmower finally gave up this spring. My neighbour suggested a cordless electric and this was the obvious choice as I am a one plus user.
    I was pretty sceptical as I have a large, fairly rough plot on a hill. It is definitely cutting the grass not mowing the lawn.
    This looks and weighs as much as a Fisher Price toy lawnmower, but don’t be fooled. The plastic is normal high quality Ryobi.
    The weight, or lack of it, is brilliant. Weirdly I can cut the grass with less effort and in less time than the old self propelled petrol mower. It is so easy to use that the grass is getting cut more often as a bonus.
    Only slight downside is the grass collection bag is not as big as the old mower, but that came as no surprise.
    A couple of the reviews here puzzle me. Height adjustment – sure it’s slightly feeble, but not difficult and how often do you adjust it?
    As for the ‘go’ switch you just press the button in the middle and grab one of the levers. It is really handy being able to change to either the left or right lever as you go.
    Battery consumption is fine, I have a lot of grass, which takes about an hour to cut, and I use about one and a half 4 amp batteries.

  9. Rated 5 out of 5

    Giuseppe G.

    Ho una piccola striscia di prato che, ogni volta che doveva essere tosato, necessitava di prolunghe che si impigliavano ovunque. Adesso è una passeggiata, fra l’altro ho 2 batterie da 4A e 2 da 2A quindi non rischi mai di rimanere a secco. Lavora bene ed è molto efficiente.

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