Switching from gas to a cordless 21-inch mower used to feel like settling for less. In 2026, the category has caught up: brushless motors push genuine torque through steel decks, batteries last an hour per charge, and weekend noise is no longer a given. I looked at five current 21-inch cordless walk-behinds aimed at suburban yards up to about three-quarters of an acre, comparing deck design, drive systems, run time, and the smaller touches that decide whether a mower is pleasant or a chore.
An Overview Of The Picks
Greenworks 80V 21in Push Lawn Mower 4.0Ah Kit
EGO POWER+ 21″ Cordless Lawn Mower LM2114
Greenworks Pro 80V 21-Inch Push Mower Tool Only
EGO POWER+ LM2135SP Self-Propelled Mower Bundle
Honda HRX-BE 21-Inch Battery Walk-Behind Mower
A Closer Look At Each Pick
The Greenworks 80V 21in push mower shows up ready to mow, with both battery and rapid charger in the box. That’s the underrated perk for anyone buying a first cordless mower: no extra purchases, no scrambling to find a compatible pack. The 80V platform gives the brushless motor (a motor with no carbon brushes, which means less friction and a longer service life) real headroom, and the 21-inch steel deck trims a noticeable amount of time off a typical quarter-acre cut.
For most smaller lawns, this is the entry point that doesn’t feel like a compromise. I like it for anyone who wants gas-grade cutting without the gas-grade maintenance, and the single-lever height adjust means switching from cool-season grass to a thicker summer cut takes seconds.
The Case For It
- Battery and charger ship in the box, so first mow is essentially out-of-the-box
- Brushless motor runs quieter and tends to last longer than brushed equivalents
- 21-inch steel deck covers ground fast, useful for open suburban lots
- Single-lever height adjust simplifies switching between grass types
Things To Consider
- Push-only design, so slopes demand real effort
- Steel deck adds weight, which can wear on wrists over long sessions
Best Suited To
Homeowners with flat, small-to-medium suburban yards who want a complete starter kit without extra trips to the retailer.
Skip It When
Your lot has noticeable slopes; the EGO POWER+ LM2135SP self-propelled bundle handles hills with far less fatigue.
EGO’s LM2114 is the middle child of the lineup, and probably the most versatile. The 56V 6.0Ah battery that comes with it delivers up to about 55 minutes of run time, which is plenty for a half-acre lot, and the seven-position height adjust lets you dial in anything from a low ornamental cut to a tall summer setting. Compared to the Greenworks 80V push mower earlier in this list, the EGO’s deck profile is noticeably easier to maneuver around flower beds.
For mixed-grass yards with some thickness, the torque the motor puts out makes short work of the patches gas mowers used to dominate. I think this is the right pick for a homeowner upgrading from a tired corded electric who doesn’t want to think about batteries anymore.
Real Benefits
- About 55 minutes of run time covers most half-acre lots in a single charge
- Seven cutting heights give finer control across seasons than typical 5-position decks
- Brushless motor keeps operation quieter than comparable gas units
- Battery swaps into any 56V EGO tool, helpful for building out a yard-care system
Worth Noting
- Push-only chassis, so hilly sections take real effort
- Plastic composite deck weighs less but can scuff if dragged over concrete edges
Key Specs
Right Fit For
Homeowners with mid-size, mixed-grass yards who want a complete kit without paying for self-propelled hardware they don’t need.
Look Elsewhere When
You regularly mow thick, tall grass; the Greenworks Pro 80V push mower’s turbo mode tackles overgrown patches with more authority.
Greenworks Pro’s 80V push mower skips the battery and charger, which sounds like a downgrade until you already own a stack of 80V packs. For shoppers expanding an existing Greenworks system, the tool-only route saves meaningful money and means one fewer battery to maintain. The 3-in-1 deck supports mulching, rear bagging, and side discharge, which gives real flexibility as seasons shift from spring growth to fall leaf cleanup.
The folding handles are a small touch I appreciate, since garage space always seems to shrink over time. I see this working best for someone who has already bought into the platform and wants a serious mower body to match.
Strengths Worth Knowing
- 3-in-1 deck handles mulching, bagging, and side discharge without extra hardware
- Turbo button adds torque for thick patches when needed
- Folding handles reduce storage footprint in tight garages
Trade Offs
- Battery and charger are not included, which raises total cost for first-time shoppers
- Push-only, so larger or sloped yards can wear out the operator
- Up to roughly 60 minutes of run time depends entirely on which 80V pack you bring to it
Whose Yard It Belongs On
Existing Greenworks 80V owners expanding a yard-care lineup who want pro-grade cutting without buying another battery.
Swap It Out When
You are buying your first cordless mower; the Greenworks 80V 21in starter kit includes the battery and charger for less hassle.
The LM2135SP is the heavy hitter in this lineup, and the first self-propelled option so far. A 56V 7.5Ah battery ships with the unit, and the bundle adds a second 5.0Ah pack, which means real run time for larger properties or thick, fast-growing grass. The Select Cut multi-blade system uses three interchangeable lower blades (mulching, high-lift bagging, and extended runtime) so the mower adapts to whatever the lawn throws at it without tools beyond a quick blade swap.
For sloped or half-acre-plus yards, the self-propelled drive does the pushing, and up to 7.0 ft-lbs of torque handles growth that would choke a smaller deck. I think this is the right call when the lawn is part of the weekend routine, not a quick once-over.
What Stands Out
- Self-propelled drive removes the strain of pushing on slopes and long passes
- Select Cut system offers three blades for mulching, bagging, or extended runtime
- Bundled 7.5Ah plus 5.0Ah batteries cover large lots without mid-mow charging
- Up to 7.0 ft-lbs of cutting torque handles thick or tall growth comfortably
Room For Improvement
- Self-propelled hardware raises weight noticeably over the push-only LM2114
- Higher cost makes it overkill for small, flat lawns
- Extra battery (the BA2800T) ships separately, so the bundle arrives in two boxes
Feature Snapshot
Made For
Homeowners with sloped, large, or fast-growing lawns who want cordless convenience without giving up self-propelled ease.
Not Your Match When
Your yard is small and flat; the EGO POWER+ LM2114 covers modest lots for less money and fewer batteries to manage.
The Honda HRX-BE brings Honda’s reputation for engine management into a battery platform. The Versamow system with Clip Director lets you mulch, bag, discharge, and shred leaves without swapping attachments, which is a real time-saver across the mowing year. Where this stands apart from the other entries on this list is the build quality, and for shoppers who treat lawn equipment as a long-term tool, that weight feels justified.
For homeowners who want Honda durability in a cordless body and care about the finer points of cut quality, this is the premium option. It’s also noticeably quieter than older Honda gas units, which neighbors tend to appreciate.
What Pays Off
- Versamow 4-in-1 system handles mulch, bag, discharge, and leaf shred in one deck
- Clip Director adjusts on the fly, no tools needed to switch modes
- Honda build quality targets long service life rather than disposable hardware
- Walk-behind design keeps storage footprint reasonable
Points To Note
- Higher cost than most battery mowers in this category
- Specialized parts can be slower to source than mainstream platforms
Feature Card
Perfect Match For
Detail-oriented homeowners who want Honda’s build pedigree in a battery platform and value a true 4-in-1 deck.
Reach For A Different Pick When
Budget matters more than premium build; the Greenworks 80V 21in starter kit handles typical lawns for noticeably less.
What To Weigh Before Choosing A Cordless 21-Inch Mower
Deck Material And Long-Term Wear
Steel decks take more cosmetic abuse but resist cracking; composite decks stay lighter and resist rust but can scuff when dragged across curbs or gravel drives. The Greenworks 80V starter and the Greenworks Pro both use steel, while the EGO LM2114 leans on a composite shell. Honda’s HRX-BE uses its own composite construction tuned for vibration damping. For most suburban yards, either approach holds up well; the deciding factor is usually how often the mower gets pulled up onto a curb.
Drive Type Versus Yard Layout
Self-propelled hardware earns its keep the moment slopes enter the picture. Flat lawns under a quarter acre rarely justify the extra weight and cost, which is why the push-only EGO LM2114 and the two Greenworks models make sense for many homeowners. The EGO LM2135SP is the right call when a yard is anything but flat, and the Honda HRX-BE gives walk-behind simplicity without drive hardware.
Battery Ecosystem And Run Time
Battery platforms vary widely. A 4.0Ah pack covers small lots comfortably, but anything approaching three-quarters of an acre starts to feel the limits of a single pack. The EGO LM2135SP sidesteps this by shipping two batteries, and the Greenworks Pro’s tool-only route only makes sense when those 80V packs are already on the shelf.
Key Considerations Across These Picks
Wrong Turns To Avoid
Shoppers often pick a battery mower by voltage alone, then run out of juice mid-cut. Realistic run time per pack matters more than peak power for most lawns. Skip “tool only” listings unless the batteries are already on hand, and confirm whether the listing ships a charger.
When Paying More Pays Off
The Honda HRX-BE and the EGO LM2135SP cost more for reasons that show up over years: longer deck life, easier mode switching, and self-propelled drive that protects the operator. For small, flat lawns, the extra cost rarely justifies itself. For larger or more demanding properties, the upgrade typically pays back in time and comfort within a single season.
Frequently Asked Questions
How long does a 21-inch cordless mower battery actually last?
Most 4.0Ah to 6.0Ah packs deliver between 45 and 60 minutes per charge in typical mowing conditions, though thick grass cuts that figure down. The 7.5Ah pack bundled with the EGO LM2135SP stretches further when paired with its included second battery.
Are cordless mowers powerful enough for thick grass?
Current brushless motors in the 56V to 80V range match or exceed the torque of small gas engines. The Greenworks Pro’s turbo mode and the EGO LM2135SP’s 7.0 ft-lbs of torque handle overgrown patches that would stall older cordless units.
Can I leave the battery on the charger overnight?
Most modern rapid chargers manage themselves and stop pushing current once the pack is full, but storing a fully topped-off battery at room temperature tends to extend its service life over years of use.
Do these mowers handle wet grass?
Cordless mowers can power through lightly damp grass, but heavy wet conditions strain any mower and reduce cut quality. Drier conditions give a cleaner cut and reduce clumping under the deck.
How loud are battery 21-inch mowers?
Brushless cordless motors run noticeably quieter than gas engines, often producing conversation-level noise. The Honda HRX-BE is especially quiet thanks to its refined motor management, which is a real perk in close-neighbor settings.
Bottom Line
Any of the five picks here will replace a tired gas mower cleanly. The Greenworks 80V starter kit covers small yards with no extra purchases, the EGO LM2114 is the everyday sweet spot, and the LM2135SP bundle takes over when slopes and larger lots enter the picture. For shoppers who want Honda-grade build in a battery body, the HRX-BE earns its premium. Match the mower to the yard, not the other way around, and the cordless 21-inch category delivers.