A 40V battery system typically balances power and runtime effectively for medium-sized lawns, a popular choice among homeowners. But does that mean a 40v lawn mower is the right tool for your yard? You want enough juice to get the job done without constantly recharging, and that’s where this category really shines. It’s a solid step up from 20V models without the heft of an 80V.
We tested one of the latest models to see how it handles real-world conditions. From thick grass to those tricky corners, we’ll break down if it lives up to the promise. You’ll get the honest details on power, battery life, and overall ease of use so you can decide with confidence.
Product Comparison Table: 10 Best 40v Lawn Mower
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Greenworks 40V 16″ Cordless Lawn Mower, Ultra-Light Push Mower…
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9.9 |
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Greenworks 40V 21″ Self-Propelled Cordless Lawn Mower – Brushless…
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9.7 |
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MZK 20V 13″ Electric Lawn Mower, Brushless Cordless Lawn…
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9.5 |
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WORX 14″ Cordless Lawn Mower, 2 in 1 Electric…
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9.3 |
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40V Cordless Lawn Mower, Electric Battery Powered 4.0Ah Walk…
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9.1 |
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MZK 40V 16″ Electric Lawn Mower, 2-in-1 Brushless Cordless…
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8.8 |
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EWORK 40V Electric Lawn Mower Cordless, 14″ Electric Push…
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8.6 |
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WORX Nitro 16″ Cordless Lawn Mower, 2 in 1…
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8.4 |
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BILT HARD 40V 17″ Brushless Cordless Lawn Mower, 2-in-1…
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8.2 |
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STEELITE 40V 17-inch Electric Lawn Mower and 12-Inch Cordless…
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8.0 |
Read Review |
Quick Review For Top 10 40v Lawn Mower
Greenworks 40V 16" Cordless Lawn Mower, Ultra-Light Push Mower with 4.0Ah Battery & Charger(75+ Tool Compatibility, 45Min Runtime)
The Greenworks 40V 16″ Cordless Lawn Mower is designed for homeowners who want a clean, quiet cut without the typical gas mower hassel. If you have a small to medium-sized yard up to about a half acre, this mower offers a compelling blend of power and simplicity.
Its core strength is the 40V 4.0Ah battery system. On a full charge, which takes about two hours, you get up to 35 minutes of continuous runtime.
Thats enough to handle most lawns in one go, and it delivers gas-like performance without the fumes, loud noise, or the need for fuel. You’ll notice the savings quickly—no more buying gas or oil, and no annual engine tune-ups, potentially saving you over $200 a year compared to a traditional mower.
One of the first things you’ll appriciate is how light and easy it is to handle.
The design is about 35% lighter than many comparable mowers, making it much easier to push and maneuver around landscaping. The 16-inch steel cutting deck is a practical size for standard gates and storage, and starting it is as simple as pushing a button—no pulling a cord.
Adjusting your cut is straightforward. A single lever lets you choose from five different height positions, from 1.25 inches up to 3.375 inches, so you can adapt to seasonal grass growth or different turf types.
Greenworks 40V 21" Self-Propelled Cordless Lawn Mower – Brushless Motor, 5.0Ah Battery & Charger(75+ Tool Compatible)
The Greenworks 40V 21″ Self-Propelled Cordless Lawn Mower is designed to be a straightforward upgrade from gas or basic corded mowing. It centers on providing real convenience without the hassles you’re probably used to, like loud noise, fumes, or pull cords. Let’s break down what it offers based on its key features.
At its core is a powerful and efficient brushless motor.
This means you get longer runtime from the battery compared to older motor types, and the operation is significantly quieter—about three times quieter than a typical gas mower. This is a major plus if you want to mow without disturbing the hole neighborhood.
The motor delivers strong torque for a consistent cut, even in thicker grass, and it’s paired with a durable 21-inch steel deck that covers a good amount of ground with each pass.
One of the biggest upgrades here is the self-propelled drive system. The mower moves itself, with rear-wheel drive providing solid traction. You can ajust the speed to match your walking pace, which makes handling slopes or uneven parts of your yard much less of a chore.
MZK 20V 13" Electric Lawn Mower, Brushless Cordless Lawn Mower with 4-Position Height Adjustment, Walk-Behind Push Mowers with 8 Gallon Grass Bag, 2 x 4.0Ah Batteries & Charger Included, LM13B8, Red
The MZK LM13B8 20V 13″ Cordless Lawn Mower is designed to make maintaining your yard a straightforward and less strenuous task. It’s a self-contained system that comes with everything you need to get started, including two 4.0Ah batteries and a charger, so you can begin mowing right out of the box without worrying about cords or gas.
At its heart is a powerful brushless motor.
This type of motor is known for its efficiency and durability, providing consistent power to the blade while requiring less maintenance over time compared to traditional motors. Paired with the twin batteries, this setup aims to deliver extended runtime, allowing you to cover a typical small to medium-sized lawn on a single charge without the need to stop and recharge partway through.
The 13-inch cutting deck is a practical size for most yards.
It’s wide enough to reduce the number of passes you need to make, saving you time, but not so large that it becomes difficult to maneuver around tighter spots or store in your shed.
WORX 14" Cordless Lawn Mower, 2 in 1 Electric Mower Cuts Quietly, Compact & Lightweight Push Lawn Mower with 6-Position Height Adjustment for Small Yards, 2 Batteries & Charger Included, WG779
The WORX WG779 14″ Cordless Lawn Mower is designed for small yards where simplicity and ease of use are key. This electric mower cuts quietly and runs on a 40V system using two 20V 4.0Ah batteries, which are included along with a dual charger. It’s built to handle up to about an eighth of an acre on a single charge, and starting it is straightforward—just push a button and pull the bail handle.
One of the standout features is the Intellicut technology.
This system uses a sensor to automatically adjust the mower’s cutting speed based on the grass conditions. When it detects thicker, denser patches, it increases power to maintain a consistant cut. In thinner grass, it slows down to conserve battery life, helping you get the most out of each charge. An onboard charge-level indicator keeps you informed about battery status so you can plan your recharges.
Weighing just under 30 pounds, this mower is notably lightweight and compact.
The 14-inch cutting deck makes it easy to maneuver around tight corners and narrow passages. The fully collapsible handle and integrated carry handle make storage and transport simple, whether your storing it in a shed or carrying it up steps. A single lever adjusts the cutting height across six positions, from 1.5 to 3.5 inches, allowing you to quickly find the right setting for your lawn’s health.
The mower offers a 2-in-1 function for bagging or mulching.
40V Cordless Lawn Mower, Electric Battery Powered 4.0Ah Walk Behind Lawnmower, 17” Cutting Width, 6-Position Height Adjustment, Bagging & Mulching Model, for Garden/Patio/Yark
The GreenWorks 40V Cordless Lawn Mower is designed to make maintaining your yard a straightforward, hassle-free task. It combines the freedom of cordless operation with the power needed for a clean, professional-looking cut, all in a user-friendly package. At its core, this mower is powered by two 20V 4.0Ah lithium-ion batteries. Together, they deliver a robust 40V performance, offering up to 40 minutes of consistent runtime on a single charge.
That’s enough power to efficiently handle lawns up to 10,000 square feet, so you can finish most medium-sized yards without worrying about the battery dying halfway through. The 1200W brushless motor is key here—it provides reliable power for thick grass and ensures a smooth, even cut every single time you use it. You won’t get those annoying patches of uncut grass or a streaky finish. The 17-inch cutting deck is a practical width.
It’s wide enough to cover ground quickly and reduce the number of passes you need to make, but it’s still nimble enough to maneuver around garden beds, trees, and patio furniture. You have full control over your lawn’s appearance with the six-position height adjustment lever. Whether you prefer a lush, longer lawn or a tight, carpet-like finish, you can dial in the perfect setting in seconds. Changing the height is a simple, one-handed operation.
MZK 40V 16" Electric Lawn Mower, 2-in-1 Brushless Cordless Lawn Mower, Walk-Behind Push Mowers with 5-Position Height Adjustment, 2 x 4.0Ah Batteries & Charger Included, LM16B011
The MZK 40V 16″ Electric Lawn Mower (LM16B011) is designed to simplify your lawn care with a cordless, user-friendly setup. It comes as a complete kit, so you have everything needed to start mowing right away, including two batteries and a charger.
At its core is a high-performance brushless motor. This motor type is key for durability and consistent power, spinning at up to 3400 RPM to cleanly cut through grass.
Because it’s brushless, the motor experiences less wear over time compared to traditional models, which means it should maintain its cutting strength for seasons to come. You won’t have to deal with the hassle of gas, oil, or a pull cord.
Runtime is a major consideration for any cordless tool. This mower adresses that by including two 40V 4.0Ah lithium batteries.
With both batteries fully charged, you can expect up to 45 minutes of mowing time, which is well-suited for small to medium-sized lawns. Having a second battery means you can swap one to the charger if needed, virtually eliminating downtime. Just remember, actual runtime can vary depending on how thick your grass is and the terrain your mowing over.
The 16-inch cutting width provides a balance between maneuverability and coverage, allowing you to finish the job efficiently.
EWORK 40V Electric Lawn Mower Cordless, 14" Electric Push Mower with 2×4.0Ah Batteries & Charger, 3800RPM Motor, 6-Height Adjustment, 21Lbs Lightweight Battery Powered Lawnmower for Garden, Small Yard
The EWORK 40V Electric Lawn Mower Cordless is designed to make maintaining a small to medium yard a simpler, quieter task. It combines the power needed for effective cutting with the convenience of a battery-operated system, all in a package that’s notably easy to handle. Power comes from two 20V 4.0Ah lithium-ion batteries that work together in a 40V system.
This setup provides consistent energy to the upgraded 3800RPM copper motor, which has the torque to handle thicker patches of grass without bogging down. Unlike a gas mower, it operates quietly, so you can mow early on a weekend morning without disturbing the neighborhood. The runtime is substantial for its class, allowing you to complete most typical yards on a single charge. You have full control over your lawn’s appearance with the six-position single-lever height adjustment.
It lets you quickly change the cutting height from a low trim of 0.86 inches up to a taller 2.44 inches for seasonal growth or different grass types. The 14-inch cutting deck is sized perfectly for navigating around garden beds, trees, and tight corners common in smaller yards. Its design promotes an even cut across the entire path. A major highlight is the mower’s lightweight build.
WORX Nitro 16" Cordless Lawn Mower, 2 in 1 Electric Mower with with Brushless Motor, Lightweight Push Lawn Mower for 1/4 Acre, 2 Batteries & Charger Included, WG737
The WORX Nitro WG737 16″ Cordless Lawn Mower is designed for efficient, straightforward lawn care. It’s a 2-in-1 electric mower that combines a brushless motor with smart technology to handle typical residential lawns up to a quarter acre. The included two batteries and charger mean your ready to start right out of the box.
At its core is a brushless motor 2.0, which provides a noticable boost in power and runtime compared to older models.
You get about 40% more power and 10% longer runtime than first-generation brushless motors, and it’s built to last significantly longer than traditional brushed motors. This power is managed intelligently by the IntelliCut system. Sensors detect grass thickness and automatically adjust the cutting speed, pushing harder in dense patches and conserving battery in thinner areas.
This helps ensure a consistant cut and maximizes your time between charges.
Runtime is optimized for lawns up to 1/4 acre using the two included 20V 4.0Ah PowerShare Pro batteries. A handy onboard indicator lets you check the charge level at a glance. A major advantage of these batteries is their compatibility. They’re part of the WORX PowerShare platform, meaning they can be used with over 140 other cordless tools and outdoor products, from trimmers to leaf blowers.
BILT HARD 40V 17" Brushless Cordless Lawn Mower, 2-in-1 Electric Lawn Mower, Push Lawnmower with 6-Position Height Adjustment, 2 x 4.0Ah Batteries & Dual Charger Included
The BILT HARD 40V 17″ Brushless Cordless Lawn Mower is designed to simplify your lawn care with a focus on power and convenience. As a cordless electric model, it eliminates the hassles of gas, oil, and extension cords, giving you complete freedom to move around your yard. It’s a solid choice for maintaining lawns up to about an eighth of an acre.
This mower is powered by two 20V 4.0Ah lithium-ion batteries, which are included in the box.
Together, they provide the energy equivalent of a 40V system, offering up to 30 minutes of runtime on a single charge. Your actual time will vary depending on grass thickness and terrain, but having two batteries means you can often finish the job without waiting for a recharge. The dual charger that comes with it lets you charge both batteries at the same time, which is a real time-saver.
At the heart of the mower is an advanced brushless motor.
This technology is key because it delivers more power to the blade for tackling tough or overgrown patches, all while being more efficient. That efficiency translates directly into longer battery life per charge and greater overall motor durability compared to traditional brushed motors. You get a consistent, powerful cut without the noise and maintenance of a gas engine.
The 17-inch steel deck offers a 2-in-1 function.
STEELITE 40V 17-inch Electric Lawn Mower and 12-Inch Cordless String Trimmer Combo with 2×4.0Ah Batteries and Dual Chargers
The STEELITE 40V 17-inch Electric Lawn Mower and 12-Inch Cordless String Trimmer Combo with 2×4.0Ah Batteries and Dual Chargers is designed to handle your entire lawn care routine without the fuss of gas or cords. This system gives you two powerful tools that share a common set of batteries and chargers, making it a straightforward and efficient choice for maintaining a neat yard.
At the heart of the lawn mower is its dual-battery setup.
It runs on two 20V 4.0Ah batteries, which team up to provide up to 30 minutes of consistent runtime. The exact time you get will depend on your grass thickness and terrain, of course. Powering the 17-inch cutting deck is a high-efficiency brushless motor that spins at 3400 RPM. This motor offers strong, reliable cutting power and is built for long-term durability with less maintenance than traditional motors.
You can start it instantly with a simple push-button—no pulling a cord, no oil, and no gas fumes to deal with.
You have flexibility in how you handle grass clippings. The mower features a 2-in-1 bagging and mulching system. You can insert the included mulch plug to finely chop clippings and return them to the lawn as natural fertilizer. Or, you can attach the spacious 40L collection bag to gather clippings for easy disposal. Adjusting the cut is simple, to.
40v Lawn Mower Buying Guide
For consistent power and tool compatibility, a 40V system is a strong middle-ground choice. It offers more muscle than an 18V model for tougher grass, yet it’s often lighter and more affordable than a heavy-duty 60V system. If you already own other 40V tools, sharing batteries is a huge perk. This guide will help you find teh right model for your yard.
Your Lawn’s Size and Terrain
Think about your typical mowing session. A small, flat yard might do fine with a basic single-battery model. But if you have a larger plot or slopes, prioritize a mower that comes with two batteries. This ensures you won’t run out of juice halfway through. For bumpy ground, look for larger rear wheels—thay handle uneven terrain much better than small ones.
Cutting Width and Deck Material
A wider cutting deck means fewer passes to finish the job. Most 40v lawn mowers range from 18 to 21 inches. A 20-inch deck is a very popular, efficient choice for average yards. Also, check what the deck is made from. Steel decks are durable but can rust; polymer decks are lighter and resist corrosion, which is great if you store your mower in a damp shed.
Battery Runtime and Charging
Always check the estimated runtime per charge, usually based on a standard battery (like 4.0Ah or 5.0Ah). Remember, thick, wet grass will drain power faster. A charger that can fully power up a battery in 60 minutes or less is a major convenience. It’s wise to have a spare battery on hand so one can charge while you mow.
Ease of Use and Storage
Little features make a big difference. A single-lever height adjustment for all wheels saves so much time compared to adjusting each one individually. A folding handle makes for compact storage in your garage. Also, consider how the grass clippings are handled: do you want a bag for a clean look, mulching for nutrients, or side-discharge for speed? The best mowers offer all three options.
Frequently Asked Questions About 40v Lawn Mower
What does 40v mean for a lawn mower?
It refers to the battery’s voltage. A 40v battery provides the power needed for most home lawns. It’s a popular choice becuase it offers a good balance of power and runtime without the hassle of gas.
How long does the battery last on a single charge?
It depends on your grass. Typically, a 40v battery runs for 45 to 60 minutes. Thick or wet grass uses more power. Having a spare battery is a great idea for larger yards.
Can it handle tall or thick grass?
Yes, but you need to be patient. For the best results, mow more frequently or use the highest cutting setting first. Trying to cut very tall grass all at once can strain the motor and drain the battery fast.
Is a 40v mower powerful enough for my yard?
For most suburban lawns, absolutely. They are perfect for yards up to about half an acre. If your yard is larger or has very steep hills, you might want to look at a higher voltage model or ensure you have two batteries.
How does it compare to a gas mower?
It’s much quieter and requires almost no regular maintenance. You don’t deal with oil, spark plugs, or gas fumes. While gas mowers can have more raw power, a 40v model is plenty for most people and so much easier to start and use.
What kind of maintenance is required?
Very little. Keep the battery charged, clean grass clippings from under the deck, and occasionally sharpen the blade. That’s mostly it. There’s no winterizing procedure like with gas engines.
Are the batteries interchangeable with other tools?
Often, yes! Many brands have a whole “system” of tools. One 40v battery might work with your string trimmer, leaf blower, and chainsaw. This is a huge advantage and can save you a lot of money.
How long does the battery itself last before needing replacement?
A good 40v battery should last for several years with proper care. Most are rated for 500 charge cycles or more. To extend its life, store it in a cool, dry place and try not to let it fully discharge every single time.
Before You Decide
A 40V system provides teh right balance of power and runtime for most residential lawn care tasks. It’s a great choice if you want to move away from gas without worrying about a cord. You’ll get a clean, quiet cut and much less maintenance. Just think about the size and terrain of your yard. If you have a lot of ground to cover, consider buying a second battery. This way, you can always have one charging while you mow.
Finally, check the features that matter most to you. Do you want a single lever for height adjustment? How important is mulching capability? Reading reviews from other homeowners can be really helpful. Taking these steps will help you find the perfect 40v lawn mower for your needs and get you ready for a simpler season of yardwork.