Cordless walk-behind mowers have grown up. The 21-inch deck used to belong strictly to gas machines, but a new generation of brushless (no internal brushes to wear down, so the motor runs cooler and lasts longer) battery platforms now handles full-size suburban lawns with quiet confidence. For anyone tired of gas tune-ups, oil changes, and pull-cord mornings, the right electric mower can replace the hassle with a single battery swap.
I focused this roundup on six 21-inch cordless mowers that pair commercial-grade decks with homeowner-friendly controls. The picks span premium self-propelled flagships, mid-spec workhorses, and compact options built for smaller yards.
A Fast Comparison Of The Options
EGO POWER+ 21″ Self-Propelled Cordless Mower LM2114SP
Greenworks 80V 21″ Self-Propelled Mower 4.0Ah Kit
Honda HRX-BE 21″ Battery Mower (HRX217YXBEXA6)
Honda HRX-BV 21″ Battery Mower (HRX217YXBVKA4)
Litheli 40V 16″ Brushless Mower 2×5.0Ah Kit
Litheli 14″ Brushless Mower 5.0Ah Kit
Meet The Standout Selections
EGO built its reputation on a 56V ARC Lithium platform, and the LM2114SP puts that lineage to work on a 21-inch deck. The self-propelled drive uses dual engagement handles, meaning you can start the blade motion with either hand, and a top-mounted dial adjusts walking speed without bending down. For a half-acre lawn with a few slopes, this is the configuration most homeowners reach for first.
Compared to the budget Litheli units further down the list, the EGO trades some portability for sustained cutting torque and a much wider service footprint. The brushless motor stays cool through longer mowing sessions, which matters when the grass has been neglected for a week.
A Strong Showing
- High-efficiency brushless motor delivers strong cutting torque that handles thick turf and damp clippings.
- Dual-lever self-propel with a top-mounted speed dial lets you fine-tune pace on the move.
- 21-inch steel deck reduces pass count versus the smaller Litheli 16-inch and 14-inch options.
- Compatible across EGO’s ARC Lithium battery family, so existing EGO tools share power.
Things To Consider
- Heavier than push-style mowers, which may matter when navigating narrow side yards.
- Battery and charger are sometimes sold separately depending on the kit configuration, so checking the included accessories is worth the extra moment.
Key Specs
Who It Suits Best
Homeowners with a quarter-acre to half-acre yard who want a self-propelled cordless mower that can handle a full Saturday mow on a single charge.
Where Another Pick Suits Better
Shoppers with a small lawn and minimal storage should look at the Litheli 14″ Brushless Mower 5.0Ah Kit, which folds flatter and weighs less.
The Greenworks 80V line targets tougher cutting conditions, and the self-propelled 21-inch mower carries that intent through to the blade. Its brushless motor is engineered for higher torque output, which is useful when the lawn has gone tall or you push through a thick patch near the fence line. Owners commonly pair it with additional 80V batteries to extend runtime on larger properties.
The trade-off is platform weight. Where the EGO LM2114SP feels nimble, the Greenworks 80V pushes more mass down through the deck, which can actually help cut quality on uneven ground. For anyone moving up from a smaller 16-inch mower like the Litheli 40V, the size jump is meaningful.
The Good Stuff
- 80V brushless motor delivers high torque for tall grass and dense sections.
- Self-propelled drive reduces fatigue on sloped or uneven terrain.
- 21-inch cutting deck covers more ground per pass than 14-inch and 16-inch mowers.
- 4.0Ah battery and charger included, so the mower is ready to use straight out of the box.
Honest Caveats
- Battery ecosystem is heavier per cell, so spares take up more storage space.
- Noise and vibration stay low for a battery mower, but the self-propel system can feel aggressive on flat lawns where less power would suffice.
Feature Snapshot
Made For
Property owners with thick turf, slopes, or neglected patches who want a battery mower with extra torque headroom.
Not Your Match When
Homeowners with a small, flat lawn may find the Litheli 14″ Brushless Mower 5.0Ah Kit easier to push and store.
The HRX-BE brings Honda’s Versamow system to a battery platform, which is the standout feature here. Versamow lets you toggle between mulching, bagging, discharging, and leaf-shredding without swapping hardware. For homeowners who switch between spring mulching and fall bagging, that single-lever adjustment saves real time.
Honda pairs this with a high-torque battery motor targeting the same output as its small gas engines, so cut quality stays steady even when the grass gets thick. Compared to the simpler Litheli mowers below, this is a more versatile tool with a steeper learning curve for the Versamow dial.
Real-World Strengths
- 4-in-1 Versamow with Clip Director switches modes without tools or attachments.
- Honda-grade build quality targets long-term durability under regular use.
- High-torque motor maintains blade RPM through heavy cutting conditions.
Worth Bearing In Mind
- Premium build puts this above the mid-tier Greenworks and EGO flagships on cost.
- Versamow dial takes a few mows to learn, so first-time users may want to read the manual before the first cut.
Best Suited To
Homeowners who mulch in spring and bag in fall, and who want Honda’s cutting engineering without gas engine maintenance.
Skip It When
Shoppers with a small yard and no leaf workload will get more value from the Litheli 40V 16″ Brushless Mower 2×5.0Ah Kit.
The HRX-BV is Honda’s other 21-inch battery walk-behind, distinguished by its twin-blade MicroCut system (two stacked blades that recut clippings into finer pieces for better mulching and denser bagging). Where the HRX-BE focuses on Versamow versatility, the HRX-BV prioritizes finer clipping processing, which is a quiet upgrade you notice mostly in autumn leaf cleanup.
You still get Honda’s high-torque motor and the same 21-inch deck size as the HRX-BE, so the side-by-side choice comes down to whether you value mulching flexibility or finer clip processing more. For comparison, the EGO LM2114SP above uses a single-blade design, so the twin-blade cut here is a real differentiator.
What Helps Most
- Twin-blade MicroCut system produces finer clippings for cleaner mulching and bagging.
- Honda’s battery motor targets gas-equivalent torque for steady RPM under load.
- 21-inch deck keeps pace with larger self-propelled mowers in this roundup.
Less Ideal Details
- Versamow is not part of this model’s feature set, so mode changes are more limited than on the HRX-BE.
- Premium pricing reflects the Honda build, which is worth weighing against the EGO LM2114SP if budget matters.
Spec Overview
Right Fit For
Detail-oriented homeowners who want finer mulched clippings and dense bagging for fall leaf cleanup.
A Better Fit Elsewhere
Shoppers wanting 4-in-1 mode switching should pivot to the Honda HRX-BE 21″ Battery Mower (HRX217YXBEXA6) reviewed above.
The Litheli 40V trades the 21-inch deck for a more compact 16-inch cutting width, and that single change reshapes who this mower serves. The 40V platform uses two 5.0Ah batteries that must both be installed for operation, which means you can hot-swap (replace one depleted battery with a charged spare without powering down the tool) into an existing Litheli 40V tool family without buying a new battery ecosystem.
Six height adjustments from 25mm to 75mm give real flexibility across lawn types, and the 50L collection bag holds more than you would expect from a 16-inch deck. Where the EGO LM2114SP dominates larger yards, this Litheli slots in nicely for townhouse lots and side yards where a 21-inch deck is overkill.
Useful Touches
- Dual 5.0Ah batteries deliver sustained 40V output without mid-mow power drop.
- Six cutting heights from 25 to 75mm cover most turf preferences in one mower.
- 50L collection bag reduces emptying trips versus smaller bag designs.
- Brushless motor cuts maintenance to blade swaps and cleaning.
Trade-Offs To Consider
- 16-inch deck means more passes than the 21-inch flagships, so very large lawns will feel slow.
- Both batteries must be inserted to run, so losing one battery temporarily takes the mower offline.
Whose Shelf It Belongs On
Suburban homeowners with a quarter-acre lawn or two who want flexible height adjustment without a 21-inch deck.
Reach For A Different Pick When
Anyone mowing a half-acre or larger property will save time with the EGO POWER+ 21″ Self-Propelled Cordless Mower LM2114SP.
The 14-inch Litheli trims down further still, and the goal here is portability above all else. The mower folds into a compact footprint for tight garages and small sheds, and the brushless motor keeps the noise low enough for early-morning mowing without neighborhood friction.
The catch is real: a 14-inch deck needs more passes on anything beyond a small lawn, and the manufacturer specifies coverage up to around 3000 sq ft per charge. That makes this a targeted tool rather than a daily driver. For comparison, the Litheli 40V 16-inch model above gives you a slightly wider cut and a larger bag for not much more effort.
Good Reasons To Consider
- Lightweight build reduces push effort and storage footprint.
- Quick-fold design collapses the mower for tight sheds and apartment storage.
- Brushless motor runs quietly and skips oil, spark plug, and carburetor service.
- 5-position height adjustment from 1 to 2.5 inches covers typical turf preferences.
Where It Is Less Suited
- 14-inch deck and 3000 sq ft coverage per charge place this firmly in the small-lawn category.
- Single 5.0Ah battery limits runtime compared to the dual-battery Litheli 40V model reviewed above.
Perfect Match For
Owners of small lawns, townhouse plots, or anyone who wants a quiet, foldable mower for weekly touch-ups.
Where Another Pick Suits Better
Shoppers needing more runtime and a wider cut should step up to the Litheli 40V 16″ Brushless Mower 2×5.0Ah Kit.
What Matters When Buying A 21-Inch Cordless Lawn Mower
Deck Size And Yard Footprint
A 21-inch deck cuts roughly a third more per pass than a 16-inch deck, which compounds across a full mow. Homeowners with under a quarter-acre rarely need 21 inches, while anything over half an acre benefits from the wider deck. The compact Litheli 14-inch and 16-inch models cover small lots without paying for capacity you won’t use.
Self-Propelled Versus Push
Self-propelled drive (the rear wheels turn with motor assistance, so you guide rather than push) is worth the upgrade for slopes, thick turf, or anyone who finds pushing tiring. Push mowers like the Litheli 14-inch and 16-inch models stay lighter and cheaper, and they handle small flat lawns well. For most mid-size suburban yards, self-propelled reduces fatigue enough to justify the higher cost.
Battery Platform And Runtime
Voltage tells you about torque, while amp-hours (Ah) tell you how long that power lasts. A 56V or 80V system delivers stronger cutting under load, but a 40V system with dual batteries can match the runtime for smaller yards. Shoppers already owning tools in a battery family (EGO, Greenworks, Litheli) save money by staying within that ecosystem.
Cut Modes And Bag Capacity
Versamow or 4-in-1 systems (mulch, bag, discharge, leaf-shred in one deck) matter most for seasonal yard work. Standard 2-in-1 mowers handle weekly mowing fine but require attachments or different machines for leaf season. Larger collection bags, like the Litheli 40V’s 50L setup, cut down on emptying stops.
Key Considerations Across These Picks
Pitfalls Shoppers Hit
A common trap is buying a 21-inch self-propelled flagship for a small flat lawn and ending up with a heavier, more expensive machine than the property needs. The opposite mistake happens too: choosing a 14-inch push mower for a half-acre lot and then resenting every pass. Match deck width to actual lawn size, and check that storage dimensions fit before committing.
Where The Extra Money Goes
Premium picks like the Honda HRX-BE and HRX-BV put the cost into build quality, twin-blade cutting, and 4-in-1 mode versatility. Mid-tier flagships like the EGO LM2114SP and Greenworks 80V spend the budget on stronger motors and self-propelled drive. Budget options like the Litheli 14-inch and 16-inch focus on portability and quiet operation. Spending up makes sense for large lawns, heavy cutting, and homeowners who want one mower for many years.
Frequently Asked Questions
How long does a 21-inch cordless mower battery last?
Most 21-inch cordless mower batteries deliver 30 to 60 minutes of runtime per charge, depending on grass thickness and cutting mode. Dual-battery kits like the Litheli 40V extend usable time by combining cells.
Are cordless mowers powerful enough for thick grass?
Higher-voltage platforms like the 80V Greenworks and Honda’s HRX series target gas-equivalent torque. For overgrown patches, mulching thick leaves, or weekly tall grass, a 56V or 80V system is the safer bet than a 40V.
Can I leave the battery on the charger?
Most modern battery platforms include automatic charge management that stops at full charge. Owners commonly store batteries on the charger between uses, though unplugging during long storage is a reasonable habit.
Do self-propelled mowers work on steep slopes?
Self-propelled drive helps a lot on slopes, but very steep hills still require careful footing. The Greenworks 80V and EGO LM2114SP both feature adjustable self-propel speed, which helps control descent.
How do I store a cordless mower in winter?
Brushless motors need no winterizing, but batteries should be stored indoors at moderate temperatures. Folding designs like the Litheli 14-inch and 16-inch models collapse into compact footprints for tight garages and sheds.
The Takeaway
The right 21-inch cordless mower depends less on horsepower and more on yard size, slope, and storage. For larger properties, the EGO POWER+ 21″ Self-Propelled Cordless Mower LM2114SP and Greenworks 80V 21″ Self-Propelled Mower lead the pack. Honda’s HRX-BE and HRX-BV serve shoppers who want premium build and versatile cut modes. The Litheli 40V and 14-inch models cover the small-lawn end of the spectrum with portable, fold-flat designs. Pick the deck width that fits the property and the platform that matches the workload, and the rest tends to fall into place.