Tackling a medium-sized lawn requires the right balance of power, runtime, and maneuverability. Gas mowers are loud and require maintenance, while lower-voltage cordless models might not finish the job. The 40-volt class of cordless mowers has emerged as the perfect solution, offering robust, cord-free power that can handle a typical suburban yard on a single charge.
This roundup focuses on the best 40V mowers designed for medium lawns. We’ve evaluated key factors like cutting width, battery life, self-propelled features, and overall durability. Whether you prioritize a lightweight push model or a feature-rich self-propelled machine, there’s an option here to make your lawn care routine quieter, cleaner, and more efficient.
Our Top Picks for 40V Lawn Mowers
- MightyMow 40V 21 inch Self-Propelled Lawn Mower
- Greenworks 40V 20″ Brushless Push Mower
- Cordless Electric Lawn Mower with (2) 40V 4.0Ah Batteries
- WORX 40V 17″ Cordless Lawn Mower for Small Yards
- Greenworks 40V 21″ Brushless Self-Propelled Lawn Mower
- Greenworks 40V 19″ Brushless Push Cordless Lawn Mower
- Greenworks 40V 21-Inch Cordless Lawn Mower
- EGO Power+ LM2135SP 21-Inch Cordless Lawn Mower
MightyMow 40V 21 inch Self-Propelled Lawn Mower
For those with larger medium-sized lawns or challenging terrain, the MightyMow is a powerhouse. It is equipped with two 8.0Ah batteries, providing an impressive runtime of up to 60 minutes even with the self-propelled function engaged. The brushless motor ensures efficient operation and a long lifespan, while the 21-inch steel deck covers a wide area with each pass.
The self-propelled feature is a major benefit, offering variable speed control from 2.0 to 4.3 ft/s. This makes navigating hills and long stretches of grass much less strenuous. With a six-position cutting height adjustment and a robust 3500 RPM motor, this mower is built for performance and convenience, allowing you to customize your cut and finish the job with ease.
Greenworks 40V 20″ Brushless Push Mower
This Greenworks model is a solid and efficient choice for a standard medium-sized lawn. Its 20-inch steel deck and brushless motor provide a clean, consistent cut while operating quietly. The included 4.0Ah battery is capable of handling up to 1/3 of an acre, making it a reliable tool for weekly mowing.
A standout feature is the integrated LED headlight, which adds flexibility to your schedule by allowing for early morning or evening mowing. This mower is also noted for being significantly quieter than gas-powered alternatives, contributing to a more pleasant mowing experience for you and your neighbors.
Cordless Electric Lawn Mower with (2) 40V 4.0Ah Batteries
This mower offers excellent value with its dual-battery system and rapid charger. The two 4.0Ah batteries provide up to 50 minutes of runtime, and the 120W dual-port charger can replenish them both in about 90 minutes. This setup is ideal for ensuring your mower is always ready to go.
Featuring a high-performance brushless motor that spins at 3,400 RPM, this mower delivers a powerful and smooth cut. The six-position height adjustment and large 8.8-gallon grass bag provide versatility and convenience for managing your lawn’s clippings effectively.
WORX 40V 17″ Cordless Lawn Mower for Small Yards
If your medium-sized lawn is on the smaller side or has many obstacles, the compact WORX mower is a perfect fit. Its 17-inch deck makes it highly maneuverable around trees and garden beds. The push-button start and lightweight design make operation simple and straightforward.
A key advantage is its place in the WORX PowerShare ecosystem. The batteries that power this mower are compatible with over 140 other tools and products, offering great versatility. The Intellicut feature is also beneficial, as it automatically adjusts power based on grass density for an efficient cut and optimal battery use.
Greenworks 40V 21″ Brushless Self-Propelled Lawn Mower
This self-propelled Greenworks mower combines a wide 21-inch cutting path with the convenience of drive-assisted mowing. The brushless motor and 5.0Ah battery work together to deliver up to 45 minutes of runtime, which is well-suited for most medium-sized properties.
You can easily adjust the cut height across seven positions with a single lever. The 3-in-1 functionality gives you the option to bag, mulch, or side-discharge clippings based on your preference and lawn care needs. The self-propelled mechanism reduces physical strain, making lawn care less of a chore.
Greenworks 40V 19″ Brushless Push Cordless Lawn Mower
This model is a dependable and straightforward push mower for well-maintained, flat to moderately sloped lawns. The 19-inch steel deck is durable and easy to handle, while the brushless motor provides reliable power and quiet operation.
It includes a 4.0Ah battery that offers around 30 minutes of mowing time. The single-lever height adjustment allows for quick changes across seven positions, and the 2-in-1 design lets you choose between mulching and side-discharging your grass clippings for a tidy finish.
Greenworks 40V 21-Inch Cordless Lawn Mower
For those seeking a wide cutting path without the self-propelled feature, this Greenworks mower is an excellent option. The 21-inch deck allows you to cover more ground with fewer passes, increasing mowing efficiency. It comes with a reliable 5.0Ah battery to power through your lawn.
This mower is designed for users who don’t mind a push model but still want the substantial cutting width typically found on larger mowers. It’s a great balance of size and simplicity, offering the core benefits of a 40V cordless system with a focus on ease of use and a clean cut.
EGO Power+ LM2135SP 21-Inch Cordless Lawn Mower
While technically a 56V system, the EGO Power+ is a premium alternative often considered alongside top 40V models. It includes a high-capacity 7.5Ah battery, ensuring extended runtime for even the most demanding medium-sized lawns. The self-propelled feature provides excellent traction and control.
This mower is known for its powerful performance and advanced features, such as a weather-resistant construction and a high-efficiency brushless motor. It represents a top-tier choice for homeowners looking for gas-like power with all the conveniences of a cordless electric mower.
Buying Guide: How to Choose a 40 Volt Lawn Mower
When I started looking for a new mower for my own medium-sized yard, I quickly realized that 40-volt models hit a real sweet spot. They offer more power than the basic 20V options but are often lighter and more affordable than the heavy-duty 80V beasts. If you’re in the same boat, here’s what I learned to focus on.
First, think about battery life and compatibility. Runtime is king. You don’t want to run out of juice halfway through the job. Look for a mower that can handle at least a third of an acre on a single charge, but remember, your actual results will vary with grass thickness and height. A huge plus is if the mower uses a battery system that works with other tools from the same brand. I have a 40-volt string trimmer and blower, so sharing batteries between them is a game-changer. It saves money and ensures I always have a charged pack ready to go.
Next, consider the cutting deck. For a medium-sized lawn, a deck between 19 and 21 inches is usually perfect. It’s wide enough to get the job done efficiently but not so wide that the mower becomes difficult to maneuver around trees and garden beds. Also, check the construction material. Steel decks are durable but heavier, while polymer decks are rust-proof and lighter, making them easier to push and lift.
Then there’s the cutting height adjustment. This might seem minor, but it’s not. A single-lever adjustment that changes the height for all wheels at once is so much more convenient than adjusting each wheel individually. It lets you quickly adapt to different seasons or grass types without any hassle.
Finally, don’t overlook the extras. A good mulching capability means you won’t have to stop to bag clippings, feeding your lawn naturally. A folding handle makes for compact storage in your shed or garage. And if your yard has any slopes, a self-propelled feature can save your back and make the whole process much less of a chore. Picking one of the 8 best 40 volt lawn mowers for medium-sized lawns comes down to matching these features to your specific yard’s layout and your personal preferences.
FAQ
How long does a 40 volt lawn mower battery last on a single charge?
This is the most common question, and the answer depends on a few things. Most 40V mowers will run for about 45 to 60 minutes with a standard 4.0 or 5.0 Ah battery. However, thick, wet grass or a very high cutting height will drain the battery faster. For a typical medium-sized lawn of a quarter to a third of an acre, a good 40V system should be able to handle it in one go, but it’s always smart to have a second battery on hand just in case.
Can a 40 volt mower handle tall or thick grass?
Yes, but you need to be strategic. A 40V mower has plenty of power for most situations, but if you let the grass get too long, it will struggle. The key is to not take off too much at once. If the grass is very tall, set your mower to its highest setting for the first pass and then lower it for a second pass a few days later. This prevents the mower from bogging down and gives you a much cleaner cut.
Are 40 volt mowers better than gas mowers?
For a medium-sized lawn, I think they often are. They start with the push of a button—no more pulling a cord. They are significantly quieter, so you can mow early on a weekend without annoying your neighbors. They have zero emissions, so you don’t smell like gas fumes afterward. And the maintenance is minimal; there’s no oil to change, no spark plugs to replace, and no carburetor to clean. The main trade-off is the runtime, but with modern batteries, that’s becoming less of an issue.
What is the main advantage of a self-propelled 40V mower?
The main advantage is reduced physical effort, especially on hills or uneven terrain. A self-propelled mower does the work of pushing itself forward. You just guide it. This makes mowing a lot less tiring and can turn a strenuous chore into a simple walk around your yard. If your property has any kind of slope, I highly recommend considering a self-propelled model.
Is it worth investing in extra batteries?
For peace of mind and extended runtime, yes, it’s often a great idea. An extra battery ensures you can always finish the job, even if you forgot to charge the first one. It also extends your total work time if you have other compatible 40-volt tools. You can use one battery in the mower while the other charges, creating a continuous workflow. When looking at the 8 best 40 volt lawn mowers for medium-sized lawns, check the cost of additional batteries for that specific brand.