The Best 40V Cordless Lawn Mowers for 2026

You’re standing in the shed, yanking a frayed pull cord for the tenth time. The gas mower sputters, coughs, and dies again. Your neighbor glides past with a cordless model that hums quietly, and you wonder why you’ve put up with the hassle for so long.

The switch to a 40V cordless lawn mower solves that. This voltage class hits the sweet spot for most homeowners: enough power for weekly cuts on a third to half an acre, without the shoulder strain of a gas engine or the tether of a cord. A brushless motor keeps things quiet, and a single battery platform can power your trimmer, blower, and chainsaw too.

We’ve narrowed the field to five models that actually deliver on their promises. These aren’t the only options, but they’re the ones worth your attention. Whether you need a featherweight for a postage-stamp yard or a wider deck for open grass, one of these will fit your routine.

Here’s a quick look at how the key specs compare across our top five.

Features	Greenworks 40V 16in	MZK 40V 16-Inch	Wild Badger Power 18-In	Worx 40V 14-Inch
Cutting Deck	16 inches	13 inches	18 inches	14 inches
Motor Type	Brushless	Brushless	Brushless	Brushless
Height Adjustments	5 positions	4 positions	5 positions	6 positions
Discharge Options	Mulch & bag	Mulch & bag	Mulch, bag & discharge	Mulch & bag
Battery Included	1x 40V 4.0Ah	2x 20V 4.0Ah	1x 40V 4.0Ah	1x 40V (size varies)

Greenworks 40V 16in Push

The Greenworks 40V 16-inch is the default answer for most homeowners, and for good reason. It’s a straightforward push mower with a 4.0Ah battery that handles typical suburban lots up to a third of an acre. If you have a flat, open yard with no extreme slopes, this machine will become part of your Saturday routine without drama.

What stands out is the weight. Greenworks claims it’s 35% lighter than steel deck mowers, and that difference shows when you’re wrestling it out of a shed or turning at the end of a row. The single-lever height adjustment is genuinely convenient; you can drop the deck for a late-summer cut or raise it for spring growth in seconds. It also runs on the same 40V battery platform as over 75 other Greenworks tools, so if you already own their trimmer or blower, you’re buying into a system, not a single machine.

There are trade-offs. The 16-inch deck means more passes on larger lawns, and the 4.0Ah battery will struggle with thick, damp grass. On a heavy spring cut, you might get 20 minutes before it slows. The two-in-one system covers mulching and rear bagging, but there’s no side discharge option, which is a limitation if you prefer to blow clippings into rows. It’s not the quietest cordless we’ve tested, though it’s still far more pleasant than any gas engine.

• 16-inch cutting deck with 5-position single-lever height adjustment
• Runs up to 30 minutes on a full 4.0Ah charge
• 2-in-1 system: mulching and rear bagging
• Compatible with 75+ Greenworks 40V tools
• 3-year limited warranty on tool and battery

Best for: The homeowner with a small-to-medium flat yard who wants a lightweight, dependable mower that shares batteries with their other cordless gear.

Greenworks 40V 16in Brushless

This second Greenworks entry looks nearly identical to our first pick, but the brushless motor changes the character of the machine. If you’ve ever pushed a mower through a patch of overgrown grass and heard the motor strain, you’ll appreciate the difference here. Brushless motors deliver more torque at low speeds, which means fewer stalls and a cleaner cut in uneven conditions.

The runtime claim of up to 30 minutes holds up better in real-world use than the non-brushless version. It’s still a 16-inch deck, so it’s not built for acreage, but it handles up to half an acre more comfortably than the standard model. The cutting height range from 1-1/4 inches to 3-3/8 inches gives you more flexibility for different grass types and seasons. Push-button start is instant, and you won’t flood an engine or pull a cord again.

The catch is that this model costs more than the non-brushless version, and for a truly small yard, you might not notice the performance difference. The battery charges in about two hours, which is fine if you mow on a schedule, but slow if you forgot to plug it in. It still uses the same 40V platform, so your investment in spare batteries carries over.

• Brushless motor for higher torque and longer lifespan
• 5-position height adjustment from 1-1/4″ to 3-3/8″
• Up to 30 minutes runtime on 4.0Ah battery
• 2-in-1 mulching and rear bagging
• 120-minute charge time

Best for: Buyers who want the extra torque of a brushless motor for slightly larger lawns or thicker grass without stepping up to a heavier machine.

MZK 40V 16-Inch 2-in-1

The MZK takes a different approach to power. Instead of a single high-voltage battery, it runs on two 20V 4.0Ah packs that work together. That’s a smart system if you already own 20V tools from other brands, but it also means you get two batteries in the box, which doubles your available runtime before needing a recharge.

This mower is best for small to medium lawns where maneuverability matters more than raw cutting width. The 13-inch deck is narrower than the others here, which sounds like a downgrade, but it lets you weave around flower beds and trees with less effort. The 30L rear bag is easy to empty, and the two-step safety start prevents accidental engagement, which is a thoughtful touch if you have kids around.

The trade-off is the cutting height range. Four positions from 1.3 to 2.6 inches is more limited than the competition. If you keep your grass very short or let it grow long in the summer heat, you’ll feel constrained. The deck size also means more passes on any lawn bigger than a postage stamp. But for a compact yard, the dual-battery runtime and lighter weight make it a practical choice.

• Dual 20V 4.0Ah batteries provide up to 30 minutes runtime
• 13-inch deck for tight spaces and easy storage
• 4-position height adjustment from 1.3″ to 2.6″
• 30L rear bag with easy-empty design
• 2-step safety start

Best for: Owners of small, detailed yards who want the security of a spare battery included and don’t need a wide cutting swath.

Wild Badger Power 40V 18-In

Wild Badger Power brings the widest deck in this roundup at 18 inches. That extra width is the whole story here. On an open lawn, you’ll finish noticeably faster because each pass covers more ground. The brushless motor spins the blade up to 3,400 RPM, which is enough to power through thicker grass without bogging down.

This is a three-in-one machine, offering bagging, mulching, and rear discharge. That flexibility is rare at this price point. If you want to collect clippings for compost in the spring, then switch to mulching during the hot, dry summer, this mower lets you do both without buying extra parts. The included 11-gallon bag is generous and doesn’t need emptying as often as smaller bags.

It’s not the lightest option here. The wider deck adds weight, and you’ll feel it when pushing uphill or lifting it for storage. The runtime on a single 4.0Ah battery is adequate for small-to-medium lawns, but if you have closer to half an acre, you’ll want a second battery on hand. The five cutting heights cover the practical range, though the adjustment lever feels slightly less refined than the Greenworks system.

• 18-inch brushless cutting deck reaches 3,400 RPM
• 3-in-1: bagging, mulching, and rear discharge
• 5-position cutting height adjustment
• 11-gallon rear collection bag
• Includes one 40V 4.0Ah battery and fast charger

Best for: Homeowners with open, medium-sized lawns who want fewer passes and the versatility of three discharge modes.

Worx Cordless Lawn Mower 40V

The Worx 40V 14-inch is the specialist of the group. Its party trick is the cut-to-edge design, where the blade extends closer to the side of the deck. That means you can run it along a fence line or flower bed and trim most of the grass without pulling out a string trimmer afterward. It’s a small feature that saves real time.

This mower targets the smallest yards, rated for up to an eighth of an acre. The compact 14-inch deck makes it exceptionally easy to maneuver and store. It fits in tight garden sheds where a bigger mower won’t. The six-position height adjustment ranges from 0.8 to 3 inches, which is the widest span in this roundup, giving you fine control over cut length.

The obvious limitation is scale. On any lawn larger than a small patch, the narrow deck means you’ll spend more time mowing. The two-in-one system handles bagging and mulching, but there’s no side discharge. The brushless motor helps extend runtime, but the battery included in the kit is modest, so check the current package on Amazon to see what capacity you’re getting.

• Cut-to-edge design reduces need for trimmer work
• 14-inch deck for maximum maneuverability
• 6-position height adjustment from 0.8″ to 3″
• 2-in-1 bagging and mulching
• Compact size for easy storage

Best for: Urban and suburban homeowners with very small lawns who want precision edging and minimal storage footprint.

How We Chose These Products

We started with a simple filter: every mower had to run on a 40V battery system. That voltage class offers the best balance of power and weight for residential use. From there, we looked at cutting deck size, motor type, and the range of discharge options. A brushless motor was a near-requirement because it lasts longer and runs cooler than brushed alternatives.

We also weighed real-world usability. A mower that’s technically powerful but awkward to push or adjust doesn’t earn a spot. We considered battery platform compatibility, because buying into a system with multiple tools gives you more value over time. Finally, we looked for honest runtime expectations. Every manufacturer overstates battery life, so we prioritized models where the gap between advertised and actual performance was smallest.

Buying Guide: What Really Matters

Deck size is the first decision. A 14-inch deck suits a tiny yard; an 18-inch deck cuts minutes off your mowing time on open grass. But wider decks are heavier and harder to turn. Match the deck to your yard’s layout, not just its total area. If you have lots of obstacles, a smaller deck is more practical.

Battery capacity matters more than voltage. A 4.0Ah battery is the standard, but real runtime depends on grass conditions. Thick, damp spring grass drains a battery fast; dry, thin summer grass sips power. If your lawn takes more than 30 minutes to mow, plan to buy a second battery. Check whether the mower uses a shared platform, like Greenworks 40V, so you can expand without buying a new charger.

Think about the cutting options you actually need. Mulching returns nutrients to the soil but requires a sharp blade and enough power. Bagging keeps the lawn clean but means emptying the bag frequently. Side discharge is useful for long grass but leaves windrows. Most cordless mowers offer two of the three; only a few offer all.

Battery Care and Longevity

Your 40V battery is the most expensive component to replace, so treat it well. Store it indoors at room temperature during the off-season. Extreme heat and freezing temperatures degrade lithium-ion cells faster than regular use. When you store the mower for winter, charge the battery to about 50% and disconnect it from the mower.

Don’t run the battery to complete empty every time. Lithium-ion cells prefer partial discharge cycles. If you stop mowing when the battery hits 20% rather than pushing until it dies, you’ll extend its usable life. Also, keep the underside of the deck clean. Caked grass forces the motor to work harder, which drains the battery faster and shortens motor life.

Our Top Recommendation

The Greenworks 40V 16-inch brushless model is the best all-around choice for most homeowners. It combines the reliability of a major brand with the torque of a brushless motor, and it operates within a battery platform that covers nearly every outdoor tool you’ll need. For flat yards up to half an acre, it’s the mower we’d buy with our own money.

If you’re on a tighter budget or have a smaller yard, the standard Greenworks 40V 16-inch push mower delivers most of the value at a lower entry point. For those with open, medium-sized lawns who want to finish faster, the Wild Badger Power 18-inch is the runner-up, offering a wider cut and three discharge modes. And if edging along borders drives you crazy, the Worx cut-to-edge design is worth a serious look.

Frequently Asked Questions

How long does a 40V mower battery actually last on thick grass?

Plan for 15 to 20 minutes of solid cutting in thick, damp spring grass with a 4.0Ah battery. In dry, thin summer grass, the same battery can stretch to 30 or 35 minutes. The motor has to work harder to shear dense growth, which draws more current. If your lawn is mostly thick grass, a brushless motor helps, but a second battery is the real solution.

Can I use an older 40V battery from my trimmer in these mowers?

Yes, if you stay within the same brand platform. Greenworks 40V batteries from older tools work in their newer mowers, provided the physical connector matches. The same applies to Worx. The caveat is that older batteries may have degraded capacity, so they won’t deliver the same runtime as a fresh 4.0Ah pack. You might get 10 minutes instead of 25.

How loud is a 40V cordless mower compared to gas?

Expect roughly 75 to 80 decibels at ear level, compared to 90 to 95 for a gas mower. That’s a significant difference. You can hold a conversation while mowing, and your neighbors won’t hear you from inside their house. Ear protection isn’t strictly necessary, though it doesn’t hurt if you’re sensitive to noise.

Is it worth buying a second battery upfront?

It depends on your lawn size and grass density. If your yard takes longer than 25 minutes to mow, a second battery lets you finish without waiting for a recharge. If you already own other tools on the same 40V platform, you may not need an extra battery because you can swap from the trimmer. For a single-yard mowing session, the included battery is often enough.