Mountfield Cordless Lawn Mower Review
Mountfield is a well-known name in garden machinery, offering a range of cordless mowers that promise convenience without the hassle of petrol or cables. This review examines their current lineup, focusing on performance, battery life, and build quality to help you decide if a Mountfield is the right choice for your lawn.
Quick answer
Mountfield cordless mowers are solid mid-range options, with the 20V HP range being best for small to medium lawns (up to 300m2). The 36V models offer more power for larger areas, but for sheer value and battery ecosystem flexibility, Ryobi or Einhell alternatives often provide better long-term value.
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Research updated June 2026.
Mountfield HP20 343LI
Best balance of power, runtime, and price for the average UK lawn.
| Model | Best For | Deck Width | Battery | Rating |
|---|---|---|---|---|
| HP20 343LI | Small to medium lawns | 34 cm | 20 V / 2.5 Ah | 4.0 / 5 |
| HP20 382LI | Medium lawns with thicker grass | 38 cm | 20 V / 4.0 Ah | 3.9 / 5 |
| 36V 462LI | Large lawns (up to 500m2) | 46 cm | 36 V / 5.0 Ah | 4.1 / 5 |
| HP20 322LI | Small, tidy lawns | 32 cm | 20 V / 2.0 Ah | 3.8 / 5 |
Who is a Mountfield Cordless Mower For?
Mountfield cordless mowers are designed for homeowners who want a reliable, low-maintenance mower without the noise and fumes of petrol. They are particularly suited to those with small to medium-sized, relatively flat lawns. The 20V HP range is ideal for gardens up to 300m2, while the 36V models can handle larger spaces.
These mowers are not aimed at professionals or those with very large, rough terrain. They are a step up from budget brands like Flymo in terms of build quality, but they do not offer the same power or battery ecosystem as premium brands like Stihl or DeWalt.
Performance and Cutting Quality
Owner reviews consistently praise the cut quality of Mountfield mowers, particularly the HP20 range. The steel deck is robust and provides good suction for a clean, even cut. The 20V motor is adequate for regular grass cutting, but it can struggle slightly with very long or damp grass. The 36V model offers noticeably more torque for tougher conditions.
The cutting height adjustment is easy to use, typically a single lever system with five steps from 25mm to 75mm. This provides good flexibility for different grass types and seasons. The grass box capacity ranges from 40L to 60L, which is adequate for most jobs, though larger lawns may require one or two empties.
Build Quality and Battery Life
Mountfield mowers are built with a sturdy steel deck, which is a positive compared to many plastic-bodied competitors. The wheels are plastic but durable, and the handles are comfortable. However, some owners have reported the plastic grass box clips breaking after a season or two, which is a known weak point.
Battery life is a key consideration. The 2.5Ah battery on the HP20 343LI typically runs for 30-40 minutes, which is enough for a 200-300m2 lawn. The larger 4.0Ah battery on the 382LI offers closer to 50-60 minutes. The 36V model provides the longest runtime, often exceeding an hour. It is important to note that battery performance degrades over time, and replacement batteries are not cheap.
Alternatives to Consider
If you are looking for a more powerful battery ecosystem, Ryobi offers a huge range of 18V ONE+ tools that share batteries with their mowers. Einhell is another strong competitor, offering excellent value and a growing Power X-Change system. For those with larger lawns, Stihl cordless mowers are more expensive but offer superior build quality and dealer support.
If budget is a primary concern, Flymo offers cheaper plastic-bodied mowers, though they lack the durability of Mountfield's steel decks. For a premium option, DeWalt or Makita cordless mowers are worth considering if you already own their power tools.
What to Check Before Buying
Before purchasing a Mountfield cordless mower, consider your lawn size. Measure your garden area accurately. The 20V models are best for lawns under 300m2. Also, check the battery capacity included. A 2.0Ah battery is only suitable for very small lawns. Finally, consider the grass box capacity. A 40L box is fine for small lawns, but a 60L box is more convenient for medium gardens.
Mistakes to Avoid
One common mistake is buying a mower with too small a battery for your lawn size. This leads to frustration with frequent recharging. Another is ignoring the grass box size. A small box on a larger lawn means constant stops to empty it. Finally, do not assume all Mountfield batteries are interchangeable. The 20V and 36V systems use different batteries and chargers.
FAQs
Are Mountfield cordless mowers any good?
Yes, they are reliable mid-range mowers with good cut quality and sturdy steel decks, ideal for small to medium lawns.
How long does a Mountfield 20V battery last?
A 2.5Ah battery typically lasts 30-40 minutes, while a 4.0Ah battery lasts 50-60 minutes under normal conditions.
Can I use a Mountfield 36V battery in a 20V mower?
No, the 20V and 36V systems are not compatible. Each uses a different battery platform and charger.
Is Mountfield better than Flymo?
Mountfield generally offers better build quality with steel decks, while Flymo is more budget-focused with plastic bodies.
How do I adjust the cutting height on a Mountfield mower?
Most models use a single central lever that adjusts the cutting height across five steps from 25mm to 75mm.
Are Mountfield mowers self-propelled?
Some models in the range are self-propelled, but many are push-only. Check the specific model specifications.
What size lawn can a Mountfield 36V mower handle?
The 36V models are suitable for lawns up to 500m2, depending on grass thickness and battery capacity.
Where are Mountfield mowers made?
Mountfield is a UK brand, but most of their mowers are manufactured in China to their specifications.
Do Mountfield mowers come with a battery and charger?
Most models are sold as a kit including a battery and charger, but always check the product listing to be sure.
How do I store a Mountfield cordless mower?
Store it in a dry place, remove the battery for separate storage, and clean the deck after each use.
Our verdict
The Mountfield HP20 343LI is the best overall pick for small to medium lawns, offering a great balance of cut quality, runtime, and price. For larger lawns, the 36V 462LI is a better choice. However, if you value a wider battery ecosystem, Ryobi or Einhell may offer better long-term value.