6 Best 40V Lawn Mowers to Buy in 2025

This Greenworks 40V 21″ self-propelled mower is a game-changer for homeowners with medium to large yards, combining raw power, intelligent design, and gas-like performance without the noise or fumes. Its brushless motor delivers serious torque, effortlessly powering through thick grass while maintaining a whisper-quiet operation under 75dB—perfect for early morning mows without disturbing the neighborhood. The 21-inch steel deck and 7-position single-lever height adjustment make it incredibly adaptable, ensuring a clean, even cut across varied terrain, while the 3-in-1 functionality (mulch, bag, side discharge) gives you total flexibility in grass management.

In real-world testing, this mower shines on sloped or uneven lawns thanks to its rear-wheel self-propel system, which reduces physical strain and improves traction—especially noticeable when tackling damp, dense grass or slight inclines. With a 5.0Ah battery providing up to 45 minutes of runtime, it handles lawns up to 1/2 acre on a single charge, though thicker growth will reduce that slightly. The mower’s vertical storage design saves 70% more space, a major win for garage-limited users, and the instant push-button start eliminates frustrating pull-cord struggles. However, the 8-inch front wheels can struggle on very rough or bumpy terrain, and the mower’s weight (around 70 lbs) makes it less ideal for users seeking ultra-light maneuverability.

When stacked against the MightyMow 40V 21”, this Greenworks model trades a bit of runtime for better brand ecosystem value and smoother handling, especially with its 7 cutting heights and superior ergonomics. It’s not as budget-friendly as the Wild Badger or the dual-battery mid-range option, but it justifies its position as the best overall 40V mower with its self-propelled drive, durable steel deck, and seamless integration with 75+ Greenworks tools. For those who want a powerful, low-maintenance, and future-proof mower that handles real yard challenges with ease, this is the gold standard—outperforming most competitors in balance, build, and usability.

The Wild Badger 40V 18” mower is a surprisingly capable entry-level machine that punches well above its price point, making it the best budget-friendly 40V lawn mower for small to mid-sized yards. It features a brushless motor spinning at 3,400 RPM, delivering consistent power for clean cuts and handling moderate grass thickness with confidence. The 5-position height adjustment (1.5” to 3.5”) ensures you can tailor your cut to seasonal needs, while the 11-gallon collection bag minimizes stops—ideal for users who hate constant emptying. Its quick 5-second fold mechanism is a standout, offering space-saving storage that’s perfect for sheds, closets, or small garages.

During testing, the mower proved highly efficient for lawns under 1/3 acre, delivering about 30 minutes of runtime—enough for most suburban yards. The 60-minute fast charger gets you back to work quickly, reducing downtime significantly compared to slower budget models. It’s light and easy to push, though the 18-inch deck means more passes for larger lawns, and the lack of self-propel becomes noticeable on longer mowing sessions or slight inclines. The plastic housing feels less rugged than steel-deck competitors, and while it handles dry grass well, it can struggle with wet or overgrown patches, requiring slower passes to avoid bogging down.

Compared to the Greenworks 16” lightweight model, the Wild Badger offers a wider cutting path and larger bag but sacrifices some brand ecosystem compatibility and long-term durability. It’s not as feature-rich as the Greenworks 20” or as powerful as the MightyMow, but for users who want a no-frills, affordable, and compact mower that starts reliably and stores easily, it’s a smart value pick. It delivers strong performance for the price, making it the best bang-for-your-buck 40V mower—outfitting you well without emptying your wallet.

Don’t let the 15-inch deck fool you—the dual-battery setup in this cordless mower makes it a stealth powerhouse for small yard warriors, earning its spot as the best mid-range 40V mower with unmatched runtime efficiency. It comes with two 4.0Ah batteries and a 30-minute dual-port rapid charger, meaning you can mow for up to 50 minutes continuously by swapping batteries—perfect for back-to-back sessions without long waits. The brushless motor hits 3,400 RPM, delivering smooth, quiet cuts and handling thicker grass better than most sub-$200 mowers. Its 6 height settings and foldable design make it both versatile and easy to store, ideal for compact urban yards or second-home maintenance.

In practice, this mower excels in small gardens and tight spaces, where its lightweight frame (under 36 lbs) and adjustable handle reduce user fatigue. The 8.8-gallon grass bag fills quickly, but it’s easy to remove and empty—though side discharge would’ve been a nice option for mulching days. While the narrow 15-inch deck increases mowing time on larger lawns, the dual-battery system compensates by keeping you moving. It’s not self-propelled, so pushing it uphill or through damp grass requires more effort, and the plastic deck feels less durable than steel alternatives. Still, for its price, the battery-to-runtime ratio is unmatched in this category.

Versus the Wild Badger 18” model, this mower trades cutting width for double the battery life and faster charging, making it better suited for users with moderate grass coverage and limited charging time. It doesn’t have the ecosystem value of Greenworks or the power of the MightyMow, but it fills a critical gap between budget and premium models. For those who want long runtime, minimal downtime, and solid performance without overspending, this is the smart middle ground—offering more battery muscle than any other mid-tier 40V mower.

The Greenworks 40V 16” mower is the lightweight champion of cordless cutting, engineered for users who prioritize ease of use, portability, and quiet operation—making it the best lightweight 40V lawn mower on the market. At 35% lighter than comparable models, it’s effortless to push, turn, and store, especially for seniors or those with physical limitations. The brushless motor delivers gas-like power with zero emissions, and the 4.0Ah battery provides up to 45 minutes of runtime, easily covering small to medium yards up to 1/2 acre under ideal conditions. Its 5-position Smart Cut system and 2-in-1 mulch/bag function offer solid versatility, while the push-button start and whisper-quiet operation (<75dB) make mowing stress-free.

In real-world use, this mower thrives in flat, well-maintained yards with regular mowing schedules. It starts instantly every time, and the ergonomic handles reduce back and arm strain—a major plus for users with mobility concerns. However, the 16-inch deck means more passes, and the lack of self-propel can feel taxing on longer mows or slightly uneven terrain. While it handles dry grass well, it struggles with tall or wet grass, requiring slower speeds to avoid stalling. The plastic deck is durable but not as impact-resistant as steel, and the grass bag is smaller than competitors, requiring more frequent emptying.

Compared to the Wild Badger 18”, this Greenworks model is lighter and quieter but offers a narrower cut and less collection capacity. It doesn’t have the runtime of the dual-battery mid-range option, but it excels in comfort and ecosystem integration, working seamlessly with 75+ Greenworks 40V tools. For users with small yards, storage constraints, or physical limitations, this is the most user-friendly 40V mower available—balancing power, weight, and convenience better than any other lightweight model.

The MightyMow 40V 21” self-propelled mower is a cordless beast built for large yards, delivering unmatched runtime and effortless mowing—solidifying its title as the best 40V mower for large lawns. With two 8.0Ah batteries onboard, it offers up to 60 minutes with self-propel and 75 minutes without, making it one of the longest-running cordless mowers in its class. The brushless motor hits 3,500 RPM, providing serious cutting power that slices through thick grass and weeds without bogging down. Its 6-position height adjustment and 3-in-1 functionality (mulch, bag, side discharge) give you full control, while the adjustable self-propel speed (2.0–4.3 ft/s) lets you stroll through mowing like a walk in the park.

In testing, this mower dominates on large, sloped, or overgrown properties, where its self-propelled drive and rear-wheel traction make hill climbing smooth and low-effort. The 21-inch steel deck ensures wide coverage, reducing total mowing time, and the dual-port charger fully replenishes both batteries in under 2 hours. It’s heavier than most (around 75 lbs), which adds stability but makes lifting into a trunk a challenge. The side discharge chute is awkward to install, and the grass bag, while large, can be tricky to fit securely. Still, for users with 1/2 acre or more, the runtime and power are unmatched.

Against the Greenworks 21” self-propelled, the MightyMow wins on battery capacity and runtime but falls short in brand ecosystem and long-term support. It’s not as refined as Greenworks, but it delivers brute performance at a competitive cost. For those who need maximum runtime, self-propel ease, and wide cutting width, this is the ultimate cordless workhorse—outlasting and outperforming nearly every other 40V mower in endurance and coverage.

The Greenworks 40V 20” feature-rich mower is a tech-packed powerhouse that blends innovation, convenience, and premium design—earning its title as the best feature-rich 40V lawn mower. It stands out with LED headlights, a rare find in cordless mowers, allowing for early dawn or late dusk mowing without shadows or mis-cuts. The 4-in-1 system (mulch, bag, side discharge, and turbo leaf pickup) is a game-changer, letting you clear light debris and leaves without switching tools. Its 20-inch steel deck and brushless motor deliver strong, quiet performance, while the 7-position single-lever height adjustment ensures precision across all grass types.

In real-world use, the aluminum handles and EZ-fold system make it light, durable, and easy to store vertically, saving valuable garage space. The 4.0Ah battery powers up to 1/3 acre, suitable for medium yards, and the push-button start is flawless every time. However, it’s not self-propelled, so pushing it on wet or dense grass can be tiring, and the turbo leaf pickup mode works best on dry, light foliage, not thick piles. The grass bag capacity is average, and while the headlight is useful, it’s not ultra-bright—more functional than powerful.

Compared to the Greenworks 21” self-propelled, this model trades self-propel and width for more features and better portability. It doesn’t have the runtime of the MightyMow or the width of the 21” models, but it offers the most innovative toolset in the 40V category. For users who want a smart, versatile, and future-ready mower with extras that simplify yard work, this is the most advanced option available—combining utility, design, and ecosystem strength better than any other.