Our verdict
A sensible small-garden cordless that earns its keep if you already own Ryobi ONE+ tools and batteries. It is light, folds away neatly and trims close to edges. On one 5Ah battery it covers about 150m2, so it suits compact lawns rather than anything sprawling.
Pros & cons
Pros
- Part of the huge ONE+ battery system
- Very light at 9kg
- EasyEdge comb cuts close to edges
- Folds compact for storage
Cons
- 18V single battery limits area per charge
- 35L box is modest
- No self-propel or roller
Full specs
| Type | Cordless |
|---|---|
| Cut width | 33 cm |
| Engine / Power | Cordless 18V |
| Weight | 9 kg |
| Deck | Plastic |
| Self-propelled | No |
| Rear roller | No |
| Mulching | No |
| Cutting heights | 6 positions |
| Bag capacity | 35 L |
| Suited to lawn | Small |
| Noise level | 75 dB |
Buying second-hand
The battery is the value, so make sure the kit includes a genuine 5Ah pack that still charges. Around £100 to £115 used with a good battery.
Where to buy the Ryobi RLM18X33B50C
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Repair-cost reference
UK 2026 ballpark prices for the parts you're most likely to need on this mower. OEM is dealer-genuine; aftermarket is what you'll find on eBay or generic small-engine suppliers. Use these to sense-check any quote and to negotiate on used buys.
| Part / job | OEM | Aftermarket |
|---|---|---|
|
Replacement 33cm blade
Annual sharpening is free; replace when bent or cracked.
|
£24–£32 | £8–£12 |
|
Replacement battery
Wear part — typical 3–5 years to 80% capacity. The biggest single repair cost on any battery mower.
|
£90–£180 | £55–£120 |
Fair-offer calculator
Tell us about a specific used listing for the Ryobi RLM18X33B50C you're looking at. We'll compute a fair offer range from our used-market data and the condition signals you provide.
Calculations are guidance, not gospel. Used-market prices vary by region (Scotland is typically 10–15% cheaper than the South-East), season (October cheapest, March most expensive), and seller motivation.
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