Cordless mowing has gone mainstream. The latest 40V platform pushes past the limits older battery mowers struggled with, handling thicker turf, larger yards, and weekly maintenance without the noise or upkeep of gas. The catch is real, though: not every 40V mower delivers the same runtime, cut quality, or build.
I put this roundup together for homeowners, renters with small yards, and anyone tired of mixing oil and gas on a Saturday morning. Whether you’re cutting a postage-stamp lawn or a half-acre suburban lot, one of these seven picks should match the way you actually mow.
The Main Contenders
Casince 17-Inch Cordless Walk Behind Mower
EGO POWER+ LM2135SP 21″ Self-Propelled Mower
Greenworks 2905203 21″ Replacement Mower Blade
Honda HRX-BE 21-Inch Walk Behind Battery Mower
Honda HRX-BV 21-Inch Battery Walk Behind Mower
Litheli 40V 16-Inch Brushless Cordless Mower
Litheli 14-Inch Brushless Push Mower
What Each Pick Brings To The Table
The Casince 17-inch is one of those mowers that quietly does the job without taking up half the garage. Its 17-inch cutting deck is narrower than the 21-inch Hondas and EGO in this list, but that tradeoff actually helps anyone navigating tight side yards, narrow gates, or awkward strips between a house and a fence.
Power comes from two 20V batteries running in parallel, which adds up to roughly 40V of output and a quoted runtime near 40 minutes. Six height settings between roughly 1 and 3 inches cover most lawn preferences. For most homeowners with small to mid-size lawns, the runtime and footprint line up well with how often they actually mow.
Practical Advantages
- Dual 20V battery setup extends runtime enough for typical suburban yards
- 17-inch deck slips through gates and narrow paths larger mowers can’t clear
- Six cutting heights from roughly 1 to 3 inches suit most turf types
- Lower deck size means less storage space required in the garage or shed
Things To Consider
- Not self-propelled, so sloped lawns demand more pushing effort
- Smaller bag capacity means more frequent emptying on larger yards
- Battery longevity depends on storage habits in extreme temperatures
Best Suited To
Homeowners with small to mid-size lawns up to roughly 5,000 square feet who want a quiet, low-fuss walk behind without committing to a 21-inch deck.
Look Elsewhere When
The EGO POWER+ LM2135SP 21″ Self-Propelled Mower suits shoppers with larger lawns who want self-propelled drive and extra battery capacity for longer sessions.
Stepping up from the Casince, the EGO POWER+ LM2135SP is what I’d reach for on a lawn that pushes past the half-acre mark. The 21-inch deck is a meaningful jump in swath width, and self-propulsion removes most of the strain on sloped or thick turf. Owners commonly report the extra 5.0Ah battery bundle takes the runtime anxiety off the table.
The Select Cut multi-blade system lets shoppers swap lower blades for mulching, bagging, or extended runtime depending on the job. Compared to the Casince 17-Inch Cordless Walk Behind Mower, this EGO trades a smaller footprint for genuine power, longer runtimes, and noticeably easier handling on larger properties.
Notable Upsides
- Self-propelled drive reduces fatigue on sloped or thick grass
- 21-inch deck finishes large lawns in fewer passes
- Select Cut blade system lets users tailor mulching, bagging, or runtime
- Bundled 7.5Ah and 5.0Ah batteries extend sessions without waiting on a recharge
- Rapid charger cuts downtime between mowing days
Worth Noting
- Larger footprint requires more garage or shed storage space
- Self-propelled drive adds weight that some shoppers may find tiring on stairs
- Higher upfront cost reflects the bundled battery configuration
Key Product Details
Who It Suits Best
Homeowners with larger suburban lawns who want self-propelled drive, swappable batteries, and the cut quality that comes from a multi-blade system.
A Better Fit Elsewhere
The Honda HRX-BV 21-Inch Battery Walk Behind Mower is a smarter match for shoppers who prioritize Honda build quality and variable-speed drive over EGO’s Select Cut flexibility.
This one breaks the pattern of the list: it’s not a mower, it’s a replacement blade. Heat-treated steel construction is the spec that matters most here, because blades dull over time and a fresh one restores cut quality without buying a new mower.
The 2905203 fits a range of Greenworks 21-inch models across the 80V and 40V platforms, so it earns a spot for Greenworks owners who want to keep their existing setup humming. Anyone who doesn’t already own a compatible Greenworks can safely skip this entry and move on.
What Earns Its Place
- Heat-treated steel holds an edge longer than standard stamped blades
- Direct-fit compatibility with multiple Greenworks 21-inch models
- Genuine replacement part avoids fitment guesswork
Room For Improvement
- Useful only for shoppers who already own a compatible Greenworks mower
- No published torque or hardness specs beyond heat-treatment claims
Made For
Greenworks 21-inch mower owners looking to refresh cut quality on an existing machine without replacing the whole setup.
Consider Something Else When
The Litheli 40V 16-Inch Brushless Cordless Mower is a better starting point for shoppers who don’t yet own a mower and want a complete battery-powered bundle.
The HRX-BE brings Honda’s reputation for cut quality into the battery category. Its 4-in-1 Versamow system with Clip Director lets shoppers mulch, bag, discharge, or shred leaves without swapping attachments, which is a real convenience on lawns that change character through the season.
Honda positions the motor output as comparable to its gas GCV series, which suggests enough torque for thick or tall grass. Where this model differs from the EGO POWER+ LM2135SP 21″ Self-Propelled Mower is push-versus-propelled operation: shoppers who prefer a traditional push feel get a lighter, simpler chassis here.
Positive Takeaways
- Versamow system handles mulching, bagging, discharge, and leaf shredding
- Clip Director lets users adjust modes without removing parts
- Honda motor output targets the torque range of gas GCV engines
- 21-inch deck suits medium to large lawns
Honest Caveats
- Push design means more effort on sloped lawns versus the EGO self-propelled model
- Battery platform specifics vary; shoppers should verify runtime for their yard size
- Premium positioning reflects the Honda build and Versamow system
Feature Snapshot
Right Fit For
Shoppers who prioritize Honda build quality, versatile cutting modes, and a traditional push feel on flat or gently sloped lawns.
Swap It Out When
The Honda HRX-BV 21-Inch Battery Walk Behind Mower suits anyone needing variable-speed self-propelled drive for steeper or uneven terrain.
The HRX-BV is the self-propelled sibling to the HRX-BE, adding variable-speed drive that adjusts to walking pace and terrain. For shoppers with sloped yards, uneven ground, or simply a preference for less pushing, that drive system changes how the mower feels over a 45-minute session.
Like the HRX-BE, it uses the Versamow system with Clip Director for mode changes on the fly. The trade-off is added weight from the drive hardware, which matters for users who carry mowers up basement stairs or lift them into truck beds.
Strengths Worth Knowing
- Variable-speed self-propelled drive matches pace to terrain
- Versamow 4-in-1 cutting system matches the HRX-BE feature set
- Honda motor output targets gas-comparable torque
Small Caveats
- Drive components add weight compared with the HRX-BE push model
- Premium Honda positioning reflects the build quality
Perfect Match For
Shoppers with sloped or uneven lawns who want Honda build quality plus self-propelled drive in a battery platform.
Where Another Pick Suits Better
The EGO POWER+ LM2135SP 21″ Self-Propelled Mower is a smart alternative for shoppers who prefer EGO’s Select Cut multi-blade flexibility over Honda’s Versamow system.
The Litheli 40V slots into the middle of this list as a sensible all-rounder for homeowners who want brushless motor durability without the premium price of a Honda or EGO. Two 5.0Ah batteries sit in the unit at once, delivering consistent 40V output rather than a brief peak followed by a voltage drop.
Six cutting heights between 25 and 75 mm give the same adjustment range as the Casince 17-Inch Cordless Walk Behind Mower, though the deck is narrower at 16 inches. The 50L collection bag is roomy for the deck size, so emptying stops stay infrequent on typical suburban lawns.
Points In Its Favor
- Brushless motor runs quieter and lasts longer than brushed equivalents
- Dual 5.0Ah batteries maintain consistent 40V output during use
- Six height settings cover most grass types and seasonal preferences
- 50L collection bag balances capacity against the compact deck size
- Maintenance-free motor skips oil, spark plugs, and carburetor cleaning
Factors To Consider
- 16-inch deck takes more passes on larger lawns
- No self-propelled drive, so sloped yards demand more effort
- Brand-specific batteries limit cross-compatibility with other platforms
Quick Facts
Who Should Grab It
Homeowners with small to mid-size lawns who want brushless motor longevity and dual-battery runtime at a budget-friendly tier.
Skip It When
The EGO POWER+ LM2135SP 21″ Self-Propelled Mower fits better for shoppers with larger lawns who want self-propelled drive and a wider deck.
The 14-inch Litheli is the smallest mower in this roundup, and that smaller deck is the point. It folds down for tight garage corners, feels light enough for older homeowners to push comfortably, and slips through gates the Litheli 40V 16-Inch Brushless Cordless Mower wouldn’t clear.
Five height settings between 1 and 2.5 inches cover the typical homeowner range, and the brushless motor keeps noise low enough for early-morning mowing. The quoted coverage near 3,000 square feet makes this the clear pick for townhouse lawns, side yards, or anywhere a 21-inch mower is overkill.
Where It Excels
- Lightweight design reduces pushing strain on smaller lawns
- Brushless motor keeps operation quiet for early-morning sessions
- Fold-down handle shrinks storage footprint in tight garages
- Five height settings handle typical residential turf preferences
Practical Considerations
- 14-inch deck means more passes on any lawn over 2,500 square feet
- Single 5.0Ah battery limits runtime versus dual-battery models
- Height range tops out at 2.5 inches, which excludes very tall grass types
Technical Reference
Built With In Mind
Townhouse owners, seniors, or anyone with a small lawn who wants a lightweight, easy-to-store mower they can lift without help.
Another Choice May Suit
The Casince 17-Inch Cordless Walk Behind Mower fits shoppers with slightly larger lawns who want more runtime and a wider deck without jumping to a 21-inch model.
Key Factors When Choosing a 40 Volt Mower
Runtime vs. Deck Size
Runtime (how long the battery lasts per charge) and deck size (the cutting width) pull against each other. A 21-inch deck finishes large yards faster, but drains batteries sooner. Smaller decks stretch runtime on the same battery but require more passes. Match the deck to your lawn: under 3,000 sq ft favors a 14 to 16-inch mower, while over 5,000 sq ft usually justifies a 21-inch model.
Drive Type
Self-propelled drive, where the mower pulls itself forward, reduces fatigue on sloped or thick lawns. Push mowers are lighter, simpler, and easier to store, but they demand more effort over a long session. Flat lawns under a quarter acre rarely need self-propulsion, while anything with a noticeable slope changes the math quickly.
Battery Configuration
Single-battery mowers limit runtime and force mid-session charging. Dual-battery setups maintain steady 40V output and let one battery cool while the other works. Brands use proprietary battery platforms, so committing to a brand locks you into that ecosystem for future replacements and accessories.
Cutting Modes
Mulching chops clippings finely and returns them to the lawn as natural fertilizer. Bagging collects clippings for a tidier look. Discharge shoots clippings out the side, which suits taller grass or infrequent cuts. A 4-in-1 system like Honda’s Versamow adds leaf shredding for fall cleanup without extra attachments.
Key Considerations Across These Picks
Mistakes Worth Dodging
Buyers often pick a deck size that doesn’t match their actual lawn. A 21-inch mower on a 1,500 sq ft lawn is overkill and harder to maneuver. On the other end, a 14-inch mower on a half-acre turns into a long, tiring chore. Measure your lawn honestly before choosing.
Another common slip is ignoring battery platform lock-in. Once you buy into a brand’s batteries, replacement packs, chargers, and future tools all come from the same ecosystem. Picking a brand with a strong tool lineup gives you long-term flexibility.
Where The Extra Money Goes
Premium 40V mowers, including the Honda HRX models and the EGO POWER+ LM2135SP, charge more for self-propelled drive, multi-blade cutting systems, and tougher deck materials. That extra spend pays off when you mow weekly, have a sloped yard, or want cut quality closer to a professional finish. Budget picks like the Litheli models cover the same basic job with simpler construction, and that’s a fair trade for smaller lawns where the premium features don’t get used often.
Frequently Asked Questions
How long does a 40V lawn mower battery last per charge?
Most 40V mowers in this list run 30 to 45 minutes per charge under normal conditions. Runtime drops in thick, tall, or wet grass because the motor draws more power under load.
Can a 40V mower handle a large yard?
Yes, if the deck is 21 inches and the battery setup includes a high-capacity pack like the EGO POWER+ LM2135SP’s 7.5Ah and 5.0Ah bundle. Smaller decks under 17 inches become tiring on anything past a quarter acre.
Is a brushless motor worth the upgrade?
Brushless motors run quieter, last longer, and use battery power more efficiently than brushed motors. For anyone mowing weekly, the upgrade typically pays back through motor longevity and slightly better runtime.
How do I store a cordless mower in winter?
Remove the batteries and store them indoors at room temperature. Cold storage reduces battery capacity over time. A folded handle, as on the Litheli 14-Inch Brushless Push Mower, saves floor space in a garage or shed.
Are replacement batteries brand-specific?
Yes, in nearly every case. Honda, EGO, and Litheli use proprietary battery designs that don’t cross between brands. Stick with the same brand for replacements and expansion packs to avoid fitment issues.
Bottom Line
A good 40V mower removes the noise, fumes, and weekend maintenance of gas without giving up the cut quality most homeowners expect. The Casince and Litheli models cover small to mid-size lawns comfortably, while the EGO POWER+ LM2135SP and Honda HRX models step up for larger or more demanding yards. Match the deck size and drive type to your actual lawn, and you’ll end up with a mower that gets used often enough to justify itself.