Reader support helps keep the reviews honest and the site humming. As an Amazon Associate, I earn from qualifying purchases.9 Best Electric Mower | 21-Inch Decks That Cut the Lawn in Half

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The EGO LM2135SP sits at the top of the electric mower hierarchy because it marries a 56V brushless motor that produces 7.0 ft-lbs of cutting torque — enough to surpass most gas push mowers — with a 21-inch stamped steel deck that chews through thick St. Augustine or wet fescue without bogging down. The Select Cut multi-blade system lets you swap between a mulching blade, a high-lift bagging blade, and an extended-runtime lower blade, so you can tune the cut to seasonal conditions. With a 7.5Ah battery included and an extra 5.0Ah pack in the bundle, you get roughly 90 minutes of total runtime, which covers a half-acre on a single charge cycle.

The Touch Drive self-propel system is the most intuitive in the category: a light palm press on the handle engages variable-speed drive from 0.9 to 3.5 MPH, and a scroll dial adjusts speed on the fly without needing to squeeze a separate bar. Owners consistently report that the mower feels lighter than its 65-pound wet weight suggests, thanks to the balanced chassis and low vibration. The 8-position single-lever height adjustment (1 to 4 inches) gives you fine-grained control for cool-season versus warm-season grass heights. The rapid charger refills the 7.5Ah battery in about 60 minutes, so you can rotate packs if you own other EGO 56V tools.

A few users noted that the self-propel can occasionally hesitate on the first engagement, requiring a second trigger pull. The mulching quality, while excellent, leaves the occasional straggler in very lush grass if the blade is not kept sharp. The extra 5.0Ah battery ships separately in the bundle, so delivery timing can be staggered by a few days. Overall, this is the set to buy if you want the closest thing to a gas-replacement electric mower for larger, demanding lawns.

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The NovorikX Obsidian Series brings a 60V 1200W brushless motor to a 21-inch steel deck, delivering cutting power that competes directly with the EGO platform for large-lawn owners. The variable-speed self-propel system ranges from 0.9 to 3.6 MPH and uses a handlebar-mounted dial for on-the-go adjustments, making uphill sections feel significantly lighter. The 5.0Ah lithium battery provides up to 65 minutes of runtime per charge, which covers about half an acre under normal conditions, and the rapid charger refills the pack in roughly 90 minutes. A built-in LED headlight is a genuinely useful addition for early morning or evening mowing sessions.

Assembly is straightforward — customers report about 15 minutes from box to first cut — and the 3-in-1 capability (mulch, bag, side discharge) covers all standard lawn care scenarios. The steel deck feels solid underfoot, and the 21-inch cutting width reduces passes compared to 20-inch decks. Owner feedback highlights the self-propel as responsive and smooth, though a few noted that the mower is heavier (66 pounds) than some gas equivalents, and the drive motor whines audibly at higher speeds. The 60V battery is compatible with NovorikX chainsaws and other tools in the ecosystem, expanding its utility beyond just mowing.

The primary criticism centers on quality control: several buyers reported units that arrived dead on arrival due to a handle lock not engaging properly, requiring a full replacement. The company’s customer service responded quickly and sent replacements, but it introduces friction out of the box. The mower also struggles on uneven terrain with steep side slopes, as the self-propel can cause the deck to ride up on one side. For level or gently rolling lawns of a half-acre or more, this is a powerful, well-featured machine at a competitive price point for the 60V segment.

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The Greenworks 48V system uses two 24V batteries wired in series to deliver the power of a higher-voltage platform while keeping individual battery weights low. The 20-inch steel deck mower features a brushless motor that provides consistent torque through moderate grass, and the 3-in-1 function (mulching, bagging, side discharge) covers all typical mowing needs. The kit includes a 12-inch string trimmer with automatic line feed and a 320 CFM variable-speed blower, making it a complete lawn care system on one battery platform. The dual-port 4A fast charger refills both 4.0Ah packs simultaneously in about 60 minutes.

Owner reports consistently praise the lightweight feel of the mower — it weighs roughly 71 pounds with batteries but the balanced design and push operation make it feel lighter on flat turf. The 7-position height adjustment ranges from 1.5 to 4 inches, giving you flexibility for different grass types. The trimmer’s 90-degree pivoting head converts to an edger with a button push, eliminating the need for a separate edging tool. The blower achieves 90 MPH at the nozzle, sufficient for clearing clippings from driveways and patios without needing a gas backpack unit.

Some users experienced charger quirks where the unit blinks red intermittently, requiring an unplug/replug cycle to reset. This appears to be a radio frequency interference issue rather than a defect, but it can be annoying. The mower’s bagging capacity is adequate for a quarter-acre but fills quickly on thick lawns, requiring frequent stops. The dual-battery system means both packs must be charged to full for maximum runtime; if one pack drifts out of balance, the mower’s power drops noticeably. For buyers seeking a single-brand, three-tool electric ecosystem without the premium EGO or NovorikX price, this kit delivers strong value.

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This Greenworks 40V combo takes a slightly different approach from the 48V kit — it uses a single 40V battery architecture with a 5.0Ah pack for the mower and a 2.0Ah pack for the trimmer and blower. The 20-inch steel deck mower provides 3-in-1 capability with a 7-position single-lever height adjustment from 1.4 to 3.7 inches. The included axial leaf blower pushes 500 CFM at 120 MPH, which is genuinely powerful for clearing wet leaves and heavy debris from lawns and driveways. The 12-inch string trimmer doubles as an edger with a rotating head, adding versatility without an extra tool.

Customers appreciate the quiet operation compared to gas equivalents, with the mower producing a hum rather than a roar that disturbs neighbors. The 5.0Ah battery provides roughly 45 minutes of mowing on a quarter-acre, and the 2.0Ah pack handles the trimmer and blower for finishing work. The lightweight trimmer at under 8 pounds reduces arm fatigue during edging. The blower’s turbo button provides a temporary burst of power for moving heavier materials. The 40V battery system is backward-compatible with dozens of older Greenworks tools, making it an easy upgrade path for existing platform users.

Several owners reported that the mower struggles with self-propel drainage — this is a push model, so keep that in mind if your lawn slopes. The 2.0Ah battery for the blower runs out quickly in turbo mode (about 10 minutes), so you may need an extra battery for larger properties. A storage switch inside the mower’s battery compartment can stick from shipping vibration, causing a false “no start” condition. Fixing it is a 30-second adjustment, but it panics first-time users. For the price, this kit offers the highest CFM blower in its class and a solid entry into the Greenworks ecosystem.

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SKIL’s PWR CORE 40 system uses a proprietary digital brushless motor that balances torque and efficiency, and the SM4910C-11 self-propelled mower is the flagship in this lineup. The 20-inch deck with 7-position single-lever height adjustment (1.5 to 4 inches) provides a wide cutting envelope for different grass types. The 6.0Ah 40V battery delivers up to 55 minutes of runtime, which covers a quarter-acre comfortably on a single charge. The variable-speed self-propel lets you dial in walking pace from a gentle stroll to a brisk walk, making it adaptable to both flat and sloped sections.

The Auto PWR JUMP charger is a standout feature: it charges the 6.0Ah battery to 50% capacity in just 5 minutes, so a quick break gives you enough juice to finish a small lawn. Owners consistently mention how quiet the motor is — barely louder than the grass being cut — and the push-button start eliminates pull-start frustration entirely. The folding handle telescopes down for vertical storage, freeing up garage floor space. The 3-in-1 capability (bag, mulch, side discharge) is standard, and the bag attaches securely with no air gaps that cause dust leaks.

Some users noted that the self-propel dead-man switch on the handlebar can snag loose clothing, requiring an awkward release to stop. The mower handles tall grass well at medium height settings but can clog at the lowest cutting height if the grass is wet or exceeds 4 inches. The 6.0Ah battery is heavy (about 5 pounds), and removing it for charging can be fussy on the first few attempts. For the price, the SKIL delivers self-propelled convenience and an excellent charger technology that sets it apart from similarly priced 40V competitors.

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The WORX Nitro WG752 introduces two proprietary technologies that separate it from the 40V pack: AeroDeck vented deck design and IntelliCut sensors. The AeroDeck creates a controlled air vortex inside the cutting chamber that lifts grass upright before the blade strikes, reducing clumping and improving bagging density. IntelliCut uses embedded sensors to detect grass density in real time and automatically dials motor speed up for thick patches and down for thin areas, conserving battery without sacrificing cut quality. The 20-inch deck with 7-position height adjustment (1.5 to 4 inches) pairs with the included two 5.0Ah PowerShare Pro batteries for up to 50 minutes of runtime on a half-acre.

The dual-battery system uses two 20V packs wired in series to create 40V, but the real advantage is battery ecosystem compatibility: the same PowerShare batteries run over 140 WORX tools, from trimmers to chainsaws to inflators. Owners consistently report that the mower feels lighter than its 55.6 pounds suggests, thanks to a well-balanced chassis and low rolling resistance wheels. The fully collapsible handle and upright storage mode make garage storage footprint minimal — about the size of a large push cart. The included dual charger refills both 5.0Ah batteries simultaneously in about 90 minutes.

Some users noted that replacement blades are currently hard to source aftermarket, which could be an issue for heavy-use owners who sharpen annually. The instruction manual is sparse, with several features requiring YouTube searches to fully understand. The bagging door can pop open on rough terrain if not fully latched, spilling clippings. A few owners reported that the AeroDeck whistles at high RPM during mulching mode, which is an aerodynamic quirk rather than a defect. For tech-forward buyers who want smart cutting adjustments and deep tool ecosystem integration, the WORX Nitro delivers an experience no other 40V mower matches.

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The BLACK+DECKER BEMW213 represents the best of what a corded electric mower can be: unlimited runtime from a 13-amp motor that cuts through tall, overgrown grass without bogging. The 20-inch stamped steel deck is wide enough for efficient mowing but light enough (about 35 pounds) for easy maneuverability around trees and flower beds. The 6-position single-lever height adjustment ranges from 1.5 to 4 inches, giving you precise control for different grass types and seasonal conditions. The winged blade design generates strong lift for collecting grass into the included rear bag, and the push-button start eliminates any starting ritual.

The folding handle is a practical feature — it collapses without tools for vertical storage in a garage corner or shed. The comfort-grip foam handle reduces vibration transfer to your hands during longer sessions. Owners consistently mention that the mower cuts as well as their old gas mowers but without the noise, fumes, or maintenance. The side discharge chute is included for when the bag fills up and you want to keep going without stopping. At roughly 35 pounds, this is one of the lightest 20-inch mowers available, making it ideal for multi-story transport or users who struggle with heavier equipment.

The cord remains the primary friction point: you need a heavy-gauge extension cord rated for 13 amps, and you’ll spend mental energy avoiding running over it. Some owners reported that the blade may not be replaceable — the blade retention system uses a non-standard bolt pattern, so you may need to buy an entire blade assembly. A few reviews noted that the motor smoked after heavy use in tall grass, typically due to the blade striking hidden debris and bending the shaft. For flat, small-to-medium lawns within 100 feet of an outlet, this corded mower delivers gas-comparable performance at a fraction of the cost of battery systems.

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The American Lawn Mower Company 51319 is a stripped-down, no-frills corded mower that gets the job done for small, flat lawns. The 13-amp motor powers a 19-inch steel deck — slightly narrower than the standard 20 inches, which saves weight (35.7 pounds) and improves maneuverability in tight spaces. The height adjustment range of 1 to 3 inches is narrower than most competitors, limiting its utility for lawns with mixed grass types or seasonal height changes. It offers mulching and rear bagging via an included mulch plug and grass catcher; there is no side discharge option.

Assembly takes about 10 minutes with no tools required for the folding handle. Owners appreciate the instant start — plug in, press the safety button, pull the bail bar, and go. The mower runs quietly enough for early morning mowing without disturbing neighbors. Several customers noted that it handles a 1,000–2,000 sq ft lawn easily and that the bag capacity (not listed but visually comparable to other 19-inch mowers) requires about 2–3 empties for a standard front yard. The plastic deck material keeps weight down but may crack if struck against a concrete curb or large rock.

The most common complaints involve the motor drawing high current — some owners reported tripping a 30-amp breaker, which may indicate the blade is seizing or the motor is under-spec. A few units arrived with the blade partially seized, requiring return. The 1-to-3 inch height range is too shallow for lawns that need a 4-inch cut during summer heat. The corded design limits you to the length of your extension cord, and the 19-inch deck means more passes on a given area compared to 20- or 21-inch models. For the price, this works as a temporary solution or for renters with tiny yards, but serious homeowners should consider the BLACK+DECKER corded or a battery model.

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The KOMASTY 40V is designed specifically for small, intricate yards where a full-size mower feels oversized and clumsy. The 15-inch cutting deck with a brushless motor spinning up to 3400 RPM delivers clean cuts in tight spaces around garden beds, trees, and narrow pathways. The 2-in-1 mulching and bagging system (no side discharge) is controlled by swapping the included mulch plug. The 5-position height adjustment ranges from 1.37 to 2.95 inches, which is adequate for fine-bladed grasses but limited for tall fescue or Bermuda lawns during peak growth.

The dual-battery system with two 4.0Ah packs provides up to 30 minutes of runtime — enough for a typical 1,000–2,000 sq ft lawn. The dual chargers mean you can charge both packs simultaneously, eliminating downtime between mowing and trimming. Owners consistently praise the lightweight design: at roughly 25 pounds with batteries, it’s easy to lift into a car trunk or carry up stairs. The push-button safety start requires pressing a side button while pulling the lever, preventing accidental engagement. The grass bag holds 10.6 gallons, which is small but proportional to the 15-inch deck — expect 3–4 empties for a standard small yard.

The most significant limitation is the 15-inch deck width: mowing a quarter-acre with this mower would take nearly twice as many passes as a 20-inch model. Several owners reported that the mower shuts off when encountering grass taller than 3–4 inches even at the maximum height setting, likely due to the motor’s torque ceiling. The plastic wheels feel less robust than steel-hubbed wheels found on larger mowers. For tiny urban lots, balconied apartments with grass patches, or RV/camper owners, this mower is a practical space-saver. For anyone with a traditionally sized lawn, the 15-inch width will frustrate.