Greenworks G40LM41K2X Lawn Mower  – Full Review & Buying Guide

greenworks g40lm41k2x

Last Updated on April 3, 2026

The Greenworks G40LM41K2X is a powerful cordless lawn mower designed for homeowners who want efficient mowing without the noise, fuel or maintenance of petrol machines. Built by Greenworks, this mower runs on a 40V lithium ion battery system, delivering reliable cutting performance while remaining environmentally friendly and easy to use.

With a 41 cm cutting width, multiple height adjustment settings, and a large 50–55 litre grass collection bag, the Greenworks G40LM41K2X is ideal for small to medium sized lawns. It also features 2 in 1 mowing functions, allowing you to collect grass clippings or mulch them to feed your lawn naturally.

We’ll explore the key features, performance, and benefits of the Greenworks G40LM41K2X to help you decide whether this cordless lawn mower is the right choice for your garden.

Best for Medium Lawns

Greenworks 40V Cordless Lawnmower 41cm 50L

Ideal for medium lawns up to 500m²
8.5/10
EXPERT SCORE

You get near-petrol cutting performance without fumes or the cable fuss, making weekend mowing quicker and cleaner. With two batteries included and a reassuring warranty, it’s a practical choice if you want cordless convenience for a typical suburban lawn.

Cutting Performance
8.8
Battery Life & Power
8.5
Ease of Use & Storage
8
Value & Warranty
8.7
Pros
True cordless convenience with two 40V batteries included
Wide 41cm cutting deck reduces passes and mowing time
5 height settings plus mulching or collection options
Large 50L collector and simple emptying system
Robust three-year product warranty and two-year battery cover
Fold-flat handle and large rear wheels for easier storage and traction
Cons
At 20.8 kg it can be heavy to lift into storage
Single 2Ah battery runtime can be limited on dense or wet grass
Grass bag may need frequent emptying when cutting damp or long turf

Overview

You’re looking at a battery-powered mower designed to replace petrol and corded models for medium-sized lawns. This model gives you a 41 cm cutting width, a 50 L collector, and two 40V 2Ah batteries so you can finish most standard suburban lawns without having to recharge mid-cut. It’s engineered to reduce noise, eliminate fuel and emissions, and simplify storage compared with a petrol machine.

Who this is for

You should consider this mower if you have:

a lawn up to around 500 m² and want cordless convenience
limited tolerance for noise or petrol maintenance
interest in straightforward storage and a mower you can use with other tools that share the 40V battery platform

If you have a very small lawn (under 100 m²) or a large estate, other compact or professional options may suit you better.

Key features explained

41 cm cutting width: strikes a balance between manoeuvrability and coverage; it reduces the number of passes compared with narrow-deck mowers without becoming unwieldy in tighter gardens.
Two 40V 2Ah batteries included: one battery powers the mower while the spare charges in the supplied charger. Each battery is rated to cut roughly 250 m² on a good day, depending on workload and grass conditions.
5 cutting heights (25 mm–80 mm) and 2-in-1 operation: you can collect clippings into the 50 L bag or mulch to return fine clippings to the lawn for nutrients.
Fold-flat handle and large 180 mm rear wheels: helps when storing in a shed and improves traction/handling across undulating ground.
Warranty: three years on the tool and two years on the batteries — gives you peace of mind compared with many third-party battery mowers.

Battery, charging and runtime notes

Batteries are the core of the cordless experience, so here are practical points to set expectations:

Each 2Ah battery is compact and lightweight, but its runtime depends on grass height, moisture, and cutting height. Expect shorter runs on wet or dense growth.
You’ll often use one battery in the mower and keep the second charging. That dual-battery approach covers most lawns up to the stated 500 m² in normal conditions.
The batteries are compatible with other Greenworks 40V tools, which helps if you want a single battery ecosystem for multiple garden tools.

Practical mowing tips to maximise results

Raise the cutting height for the first pass if the grass is long, then lower gradually for a cleaner finish.

Avoid mowing very wet grass when possible — clippings pack harder into the collector and use more battery power.

Check and clear the discharge/collection area behind the cutter after long cuts to prevent clogging.

Use the mulching option in dry conditions to return nutrients to your lawn and reduce trips to the bin.

Maintenance and durability

You’ll look after this mower with a few simple tasks:

Clean the underside of the deck after use to prevent grass build-up. A plastic scraper and a brush work well.

Check and tighten bolts and handle fasteners periodically, especially after a season of use.

Sharpen or replace the blade as needed — a blunt blade tears grass and strains the motor.

Store batteries in a cool, dry place and avoid leaving them discharged for long periods to maximise lifespan.

Safety and ergonomics

The mower uses a dead-man safety lever: you must hold the top handle to run the blades. This reduces the risk of accidental operation.

Large rear wheels help stability on uneven ground, but be mindful when cutting slopes — do not cross very steep gradients and follow local safety guidance.

What’s in the box

Cordless mower unit with integrated 41 cm deck
Two 40V 2Ah lithium-ion batteries
Single charger compatible with both batteries
50 L grass collector bag
Basic assembly hardware and user manual

Quick spec table

SpecificationDetail
Cutting width41 cm
Collector volume50 L
Batteries supplied2 × 40V 2Ah
Cutting height positions5 (25–80 mm)
Weight (unpacked)20.8 kg
Warranty3 years tool / 2 years batteries

How it compares to alternatives

Versus corded mowers: you gain freedom of movement and avoid extension leads, but you trade virtually unlimited runtime for battery-limited operation.

Versus petrol mowers: you lose long continuous runtime and some raw torque, but you save on fuel, reduce noise, and eliminate exhaust emissions for a cleaner user experience.

Versus higher-capacity battery systems: this mower’s included 2Ah batteries are lighter and cheaper, but higher-capacity (e.g., 4–5Ah) packs would extend runtime if you need them.

Final practical judgement

If you want dependable cordless mowing for a typical medium garden and prefer an organised two-battery workflow, this mower gives strong real-world performance. You’ll need to accept the physical weight when lifting it into storage and be mindful of runtime on very heavy or wet grass, but the wide deck, mulching option and warranty make it a sensible, low-hassle replacement for many petrol or corded models.

Greenworks 40V Cordless Lawnmower 41cm 50L
Greenworks 40V Cordless Lawnmower 41cm 50L
Ideal for medium lawns up to 500m²
Amazon.co.uk

FAQ

How long will the included batteries actually let me mow?

Real-world runtime depends on grass height, density, and whether you mulch or collect. Each 2Ah battery is typically capable of mowing roughly 200–300 m² under normal, dry conditions. Because two batteries are supplied you can swap in the spare and complete most lawns up to about 500 m² without interruption.

Can you use larger Greenworks batteries with this mower?

Yes. The mower uses the Greenworks 40V platform, so higher-capacity 40V packs (if you have them from other tools) will extend runtime. Larger batteries are heavier but give fewer charges between recharging cycles.

Is the mower suitable for damp or long grass?

It will cope with damp and longer grass better than many compact electric machines thanks to its weight and 41 cm deck, but wet grass increases clumping and drains battery faster. For best results, let the lawn dry a little and cut in stages starting with a higher deck position.

How difficult is it to assemble and store?

Assembly is straightforward: install the handle, fit the catcher and batteries, and you’re ready. The handle folds flat for storage, but the unit is relatively heavy to lift, so plan storage placement accordingly.

What maintenance will keep it running well for years?

Regularly clean the deck underside, keep the blade sharp, check fasteners, and store batteries in a cool, dry place. Avoid prolonged storage with batteries fully discharged to preserve battery life.

Is it loud and suitable for noise-sensitive areas?

It’s much quieter than a petrol mower and is a good choice for noise-sensitive areas or early/late garden work. You’ll still hear the motor and blade, but overall noise levels are considerably lower than combustion engines.

Will the 50L grass bag fill up quickly?

How often you need to empty the bag depends on grass length and moisture; expect more frequent emptying when grass is long or wet. The bag is a decent size for typical medium lawns but not as large as many petrol mower collectors.

What happens if the mower clogs or stalls?

If the cutter clogs, stop the mower, remove the battery before clearing the blockage, then inspect the deck and grass outlet. Never reach under the deck with the battery installed or the machine powered.

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