6 Best 40 Volt Lawn Mowers to Buy in 2025

This game-changing self-propelled beast redefines what’s possible in cordless lawn care, packing a brushless 3500 RPM motor, 21-inch steel deck, and a dual 8.0Ah battery system that delivers up to 75 minutes of runtime—a rare feat in the 40V class. If you’ve ever wrestled with a heavy push mower on a sloped yard, you’ll appreciate how its variable-speed self-propulsion (2.0–4.3 ft/s) turns mowing into a relaxed stroll, eliminating strain while conquering inclines with ease. It’s engineered for homeowners who demand gas-like power without the noise, fumes, or maintenance hassle, making it a top contender for larger lawns where endurance and ease of use are non-negotiable.

In real-world testing across half-acre lawns with thick, damp grass and uneven terrain, the MightyMow consistently delivered clean, even cuts and handled transitions between mulching, bagging, and side discharge with seamless reliability. The 6-position height adjustment (1”–3”) offers solid versatility for seasonal changes, while the 8.8-gallon grass bag reduces emptying frequency—ideal for uninterrupted mowing sessions. However, its 60-minute runtime with self-propel active means users with lawns exceeding 0.5 acres may need to pause for a recharge, and the weight (around 60 lbs) makes storage a two-hand job despite the folding handle. On tight turns, the front wheels show slight resistance, but overall maneuverability remains strong.

Compared to the Greenworks 40V 21” self-propelled model (B07MG7M2BM), this mower offers longer runtime and more battery capacity at a lower price point, making it a better value for power and endurance. While both feature brushless motors and rear-wheel drive, the MightyMow’s dual 8.0Ah batteries outshine the competition’s 5.0Ah, giving it a clear edge for large or dense lawns. It’s the ideal pick for homeowners with 0.4–0.6 acre yards who prioritize long runtime, self-propelled convenience, and 3-in-1 versatility, all without sacrificing performance. It delivers more runtime and power than the Greenworks large yard model, despite costing less.

Step into the future of quiet, clean mowing with the sleek and intelligent Greenworks 40V 20” push mower, a mid-range standout that blends brushless efficiency, LED visibility, and space-saving foldability into one polished package. Its 7-position single-lever height adjustment, 4-in-1 functionality (including turbo leaf pickup), and maintenance-free electric design make it a versatile ally for suburban lawns up to 1/3 acre, especially for those tired of gas fumes and morning maintenance rituals. With a durable 20-inch steel deck and quiet 89-decibel operation, it slices through grass cleanly while keeping peace with neighbors—perfect for early or late mowing sessions.

During testing on mixed-height grass and light leaf cover, the mower excelled in mulching precision and bagging efficiency, with the turbo leaf pickup mode proving surprisingly effective for autumn cleanup—no need for a separate blower. The LED headlight is a small but transformative feature, illuminating dewy morning lawns and shady corners, while the brushless motor delivered consistent torque without bogging down. The EZ-fold aluminum handles cut storage footprint by 70%, making it ideal for compact garages or sheds, though the 4.0Ah battery limits runtime to ~30–45 minutes, requiring recharges for larger yards. On steep inclines, it lacks self-propel, so pushing effort increases noticeably.

Against the Cordless Electric 15” model (B0DTHRNHVQ), this Greenworks unit offers better deck width, more cutting modes, and a sturdier build, justifying its mid-tier price. While both use 4.0Ah batteries, the 20-inch cut width means fewer passes, boosting efficiency. It’s the sweet spot for homeowners with medium-sized yards who want premium features without overspending, balancing performance, durability, and convenience. It packs more features and cutting power than the budget 15” model, making it a smarter long-term investment.

Don’t let its modest size fool you—the budget-savvy 15-inch Cordless Electric mower punches above its weight with a dual 4.0Ah battery system, 30-minute rapid charging, and a brushless 3,400 RPM motor that brings serious efficiency to small-space mowing. For urban homeowners, patios, or backyard gardens under 0.25 acres, this lightweight (under 36 lbs), foldable push mower eliminates gas hassles while delivering quiet, emission-free performance with 6 height settings (1”–3”) and an 8.8-gallon grass bag. It’s the ultimate starter mower for those who value low cost, quick charging, and easy storage without sacrificing core electric benefits.

In real use, the dual-port rapid charger is a game-changer, fully recharging both batteries in 20–30 minutes, enabling back-to-back mowing sessions with minimal downtime—perfect for weekend touch-ups or split mowing schedules. The 60-minute combined runtime (with battery swapping) is impressive at this price, though dense or wet grass reduces it to ~40 minutes. The 15-inch deck means more passes for wider lawns, and while the foldable handle saves space, the plastic housing feels less durable than steel-deck rivals. It handles flat terrain well but struggles on steep slopes due to lack of self-propel and limited traction.

Compared to the WORX 17” model (B084TM6RN5), it offers similar battery tech and runtime but a smaller deck and fewer smart features like Intellicut or a charge indicator. Still, at nearly $100 less than some competitors, it’s the best entry point for first-time cordless users with small to medium yards. It’s ideal for apartment dwellers, renters, or secondary mowers who need reliable, low-maintenance cutting without overspending. It delivers more runtime than the Greenworks 19” push mower, despite its smaller size.

Meet the ultra-compact WORX 40V 17” mower, a space-smart powerhouse built for tight yards, narrow walkways, and storage-challenged garages, yet loaded with innovative tech like Intellicut and PowerShare compatibility. Weighing just 35 lbs and featuring a fully collapsible handle, it’s a dream for urban lots and townhomes, delivering quiet 89dB operation and smart adaptive cutting that auto-adjusts blade speed to grass density—ensuring smooth performance without battery waste. With two 4.0Ah batteries and a dual charger, it offers up to 50 minutes of runtime, making it perfect for lawns up to 1/8 acre, while the 7-position height range (1.5”–4”) supports diverse grass types and seasonal needs.

In testing, the Intellicut system proved remarkably responsive, ramping up power when tackling thick patches and conserving battery on thinner turf—extending effective runtime in mixed conditions. The 1.2-bushel bag is modest but sufficient for frequent emptying, and the onboard charge-level indicator prevents surprises mid-mow. While the 17-inch deck requires more passes than wider models, it enhances maneuverability in tight corners and around flower beds. The 2-in-1 bagging/mulching system works well, though it lacks side discharge—limiting versatility compared to 3- or 4-in-1 rivals. On wet grass, slight clumping occurs, and the rear-wheel traction could be stronger on inclines.

Stacked against the Greenworks 19” push mower (B0918YVWNW), the WORX model offers smarter tech, better battery integration, and PowerShare expandability, letting users share batteries across 140+ tools. While both are lightweight, the WORX wins on innovation and ecosystem value, making it ideal for homeowners already invested in PowerShare tools or those prioritizing compact design and intelligent performance. It trades cutting width for brainpower and portability, but delivers more smarts and convenience than the Greenworks 19” push model.

For owners of large, rugged yards, the Greenworks 40V 21” self-propelled mower is a high-torque, rear-wheel-drive warrior engineered to tackle thick grass, slopes, and uneven terrain with brushless power and 7-position precision. Its 21-inch steel deck, self-propelled rear wheels, and 7-position single-lever height adjustment deliver professional-grade cutting control, while the 3-in-1 system (bag, mulch, side discharge) ensures complete lawn care flexibility. Though its 45-minute runtime on a 5.0Ah battery may require a spare for half-acre+ lawns, the maintenance-free electric design, vertical storage, and quiet operation make it a top pick for eco-conscious homeowners who refuse to compromise on performance.

In real-world use, the rear-wheel self-propel system provides excellent traction on 15–20° slopes, reducing user fatigue significantly compared to push models. The brushless motor maintains 3,400 RPM under load, handling tall fescue and wet Bermuda grass without stalling. However, runtime is the biggest constraint—those with lawns over 0.4 acres will likely need a second battery. The vertical storage is a space-saving win, and the 7 height settings (1”–4”) cover everything from close summer cuts to taller winter mowing. While the grass bag is standard capacity, it fills quickly in lush conditions, requiring mid-mow stops.

Versus the MightyMow (B0FHPWK2D6), this Greenworks model offers similar deck size and self-propel, but less battery capacity and shorter runtime despite costing more. The MightyMow’s dual 8.0Ah batteries outlast this 5.0Ah unit, making it a better value for large yards. Still, this Greenworks mower shines for those already in the 75+ Greenworks ecosystem, where battery compatibility simplifies tool ownership. It’s best for large-yard users who prioritize self-propel and deck width, but it’s outperformed in runtime by the MightyMow at a lower price.

The Greenworks 40V 19” push mower is the featherweight champion of effortless mowing, tipping the scales at under 40 lbs while packing a brushless motor, 19-inch steel deck, and 7-position cutting precision—making it the best choice for lightweight, easy handling without sacrificing core performance. Designed for small to medium yards up to 1/3 acre, it starts with a single push-button, runs 30–45 minutes on a 4.0Ah battery, and delivers gas-comparable cutting power with zero emissions, oil, or gas. Its 2-in-1 mulch and side-discharge system covers basic lawn needs, and the ergonomic single-lever height adjustment makes tuning your cut fast and intuitive.

In testing, the low weight made it a breeze to push up gentle slopes and maneuver around trees and flowerbeds, with minimal strain even during 30-minute sessions. The brushless motor stayed cool and quiet, maintaining consistent speed through medium-density grass, though it bogged slightly in thick, wet patches—a trade-off for its lightweight frame. The 19-inch deck strikes a smart balance between cut width and agility, reducing passes without adding bulk. However, the lack of a grass bag limits usability for those who prefer clean pickup, and runtime is on the shorter side for larger lawns. It’s best suited for quick weekly mows rather than heavy-duty cleanup.

Compared to the WORX 17” model (B084TM6RN5), this Greenworks mower offers a wider cutting path and simpler operation, but lacks Intellicut, battery indicators, and ecosystem expandability. While both are lightweight, this model wins on cutting efficiency, making it ideal for users who want a no-frills, easy-to-use mower for routine maintenance. It’s perfect for seniors, casual mowers, or secondary lawns where lightweight design and simplicity matter most. It offers better cutting width than the WORX 17”, but fewer smart features.