Get a standard cutting width with the quiet, instant-start convenience of cordless electric power. That’s the core promise of a modern 21 electric lawn mower, and it’s a game-changer for weekend warriors. You can say goodbye to gas cans, pull cords, and ear-splitting noise. Instead, you get a clean, simple start at the push of a button and a much more peaceful mowing experience for you and your neighbors.
But is a 21-inch battery-powered model right for your yard? We tested one of the top models to see how it handles real grass and real life. Let’s dive into the performance, battery life, and overall value to see if it can truly replace your old gas guzzler.
Product Comparison Table: 9 Best 21 Electric Lawn Mower
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Greenworks 40V 21″ Self-Propelled Cordless Lawn Mower – Brushless…
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9.6 |
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EGO POWER+ Electric Lawn Mower, Self-Propelled Cordless with Select…
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9.4 |
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EGO Power+ Electric Lawn Mower, Self-Propelled Cordless with Touch…
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9.2 |
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MZK 20V 13″ Electric Lawn Mower, Brushless Cordless Lawn…
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9.0 |
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EGO POWER+ Electric Lawn Mower, Cordless, Includes 56V 6.0Ah…
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8.8 |
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Greenworks 80V 21″ Brushless Cordless (Push) Lawn Mower (75+…
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8.5 |
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Greenworks 48V (24V x 2) 21″ Brushless Cordless (Self-Propelled)…
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8.3 |
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Greenworks 60V 21″ Cordless Lawn Mower – 5.0Ah Battery…
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8.1 |
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Greenworks 60V 21″ Self-Propelled Cordless Lawn Mower, Brushless Motor,…
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7.9 |
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Quick Review For Top 9 21 Electric Lawn Mower
Greenworks 40V 21" Self-Propelled Cordless Lawn Mower – Brushless Motor, 5.0Ah Battery & Charger(75+ Tool Compatible)
The Greenworks 40V 21″ Self-Propelled Cordless Lawn Mower is designed to simplify your lawn care by eliminating the hassles of gas and cords. It’s a complete system that gives you the freedom to mow on your schedule, without the noise, fumes, or maintenance of a traditional mower. At its heart is a powerful brushless motor. This technology is key for longer runtime and more torque, meaning it can handle thick grass without bogging down.
It’s also significantly quieter—about three times quieter than a gas mower—which is a considerate feature for you and your neighbors. The durable 21-inch steel deck provides a wide cutting path for efficiency, ensuring a clean, even cut across your lawn. One of the standout features is the self-propelled rear-wheel drive. This means the mower moves itself, you just guide it.
With variable speed control, you can easily adjust the pace to match your walking speed and the terrain, whether it’s a flat yard or a slight incline. It takes the physical effort out of mowing, making it much less of a chore. For those busy days, the bright LED headlight is a practical addition, letting you start early or finish late without sacrificing visibility. This mower adapts to your lawn’s needs with its 4-in-1 versatility.
EGO POWER+ Electric Lawn Mower, Self-Propelled Cordless with Select Cut and Touch Drive, Includes (2) 56V 6.0Ah Batteries and Rapid Charger – LM2134SP-2
The EGO POWER+ LM2134SP-2 Electric Lawn Mower is a cordless, self-propelled machine designed to give you a powerful and convenient mowing experience without the hassle of gas or cords. At its heart is the Select Cut multi-blade system. This isn’t a single blade, but a system that works together to give you a clean, consistent cut whether your grass is damp, thick, or just needs a regular trim. You can customize the finish to your liking.
It offers three ways to handle clippings: mulch them back into the lawn for nutrients, collect them in the included bag for a clean look, or use the side discharge for faster mowing in overgrown areas. With eight height adjustments, from a short 1-inch cut up to 4 inches, you have full control over your lawns appearance. The Touch Drive self-propelled technology is a standout feature. Instead of a lever or switch, you simply touch the handle bar to engage the drive.
It puts complete control in the palm of your hands, letting you easily navigate hills, obstacles, or tight corners without straining. You can adjust the speed from a slow 0.9 MPH for precise work up to a brisk 3.1 MPH for open spaces, making the mower adapt to your pace, not the other way around. Power comes from two included 56V 6.0Ah ARC Lithium batteries.
EGO Power+ Electric Lawn Mower, Self-Propelled Cordless with Touch Drive, Includes 56V 7.5Ah Battery and Rapid Charger – LM2125SP
The EGO Power+ LM2125SP Electric Lawn Mower is a cordless, self-propelled model designed to make mowing your lawn a simpler and more powerful experience. It’s built around a 56V ARC Lithium battery system, which aims to provide the kind of performance you might expect from gas, but without the fumes, noise, and maintenance hassles.
This mower comes ready to use with a 56V 7.5Ah battery and a rapid charger in the box.
One of the standout features here is the Touch Drive self-propelled technology. Instead of a lever you have to constantly squeeze, you simply press your palm against the handle bar to engage the drive. A dial right by your thumb lets you scroll through speed settings, so you can match your walking pace easily. It’s a very intuitive system that reduces hand fatigue.
The mower also starts with a quick push-button, so there’s no pulling a cord ever again.
Power is a key focus. EGO equips this mower with a high-efficiency brushless motor that delivers substantial cutting torque. The claim is that it exceeds the power of many typical gas-powered mowers, which means it should handle thick grass and tough conditions without bogging down.
MZK 20V 13" Electric Lawn Mower, Brushless Cordless Lawn Mower with 4-Position Height Adjustment, Walk-Behind Push Mowers with 8 Gallon Grass Bag, 2 x 4.0Ah Batteries & Charger Included, LM13B8, Red
The MZK LM13B8 20V 13″ Cordless Lawn Mower is designed to make maintaining a neat lawn straightforward and less of a chore. At its core is a powerful brushless motor that works with the included pair of 4.0Ah batteries.
This combination provides a solid runtime to handle typical suburban lawns on a single charge, and the brushless technology means the motor itself requires virtually no maintence and runs more efficiently for its size.
You’ll appreciate the 13-inch cutting width as it lets you cover ground quicker than narrower models. Fewer passes across your lawn means you finish the job faster.
The attached 8-gallon (30-liter) grass bag has ample capacity to collect clippings, so you won’t have to stop and empty it constantly. When the bag is full, its easy to detach and dump.
Getting the right cut for your grass is simple with the four-position height adjustment. You can set the cutting height anywhere from 1.2 inches to 1.5 inches.
EGO POWER+ Electric Lawn Mower, Cordless, Includes 56V 6.0Ah Battery And 320W Charger – LM2114
The EGO POWER+ LM2114 Cordless Electric Lawn Mower is designed to change how you think about yard work. It’s a complete system that includes the mower, a 56V 6.0Ah battery, and a 320W fast charger, so you’re ready to go right out of the box. This mower aims to replace the hassle of gas without giving up any performance. A key point is it’s power. The mower is built with a high-efficiency brushless motor that delivers substantial cutting torque.
EGO states this power actually exceeds that of many typical gas-powered mowers. This means it can handle thick, overgrown grass without stalling or struggling, providing a consistent and clean cut every time. You won’t miss the noise, smell, or maintenance of a gas engine. Runtime is always a concern with cordless tools, and this model adresses it directly. The included battery provides up to 55 minutes of mowing on a single charge, which is enough for a large lawn for many people.
If you need more time, the battery platform is compatible with all EGO 56V ARC Lithium batteries, so you can swap in a spare if you have one. The 320W charger gets you back to work quickly. You have full control over your lawn’s look with seven different cutting height settings, adjustable from 1.25 to 4 inches with just one hand. The mower offers versatility in handling clippings: you can mulch for nutrients, side discharge, or use the included two-bushel grass bag for a clean finish.
Greenworks 80V 21" Brushless Cordless (Push) Lawn Mower (75+ Compatible Tools), (2) 2.0Ah Batteries and 30 Minute Rapid Charger Included
The Greenworks 80V 21″ Brushless Cordless Lawn Mower is designed to give you a powerful, gas-free mowing experience without the hassle. It comes as a complete kit with two 2.0Ah batteries and a rapid charger, so your ready to start right out of the box.
This mower is part of the Greenworks 80V ecosystem, which means those same batteries can power over 75 other compatible tools, from trimmers to snow blowers, making it a smart investment for your entire yard.
At its core is the TruBrushless Motor. This technology is key. It delivers twice the torque of standard motors for more consistent power, especially in thicker grass.
You get longer runtimes from your batteries, the motor itself lasts much longer, and it all operates at a significantly quieter volume than a traditional gas mower. With the two included batteries, you can expect up to 60 minutes of runtime, though this will vary depending on how thick your grass is and your mowing pace.
Greenworks 48V (24V x 2) 21" Brushless Cordless (Self-Propelled) Lawn Mower (LED Headlight), (2) 5.0Ah Batteries and Dual Port Rapid Charger Included (200+ Compatible Tools)
The Greenworks 48V (24V x 2) 21″ Brushless Cordless Self-Propelled Lawn Mower is designed to simplify your lawn care with serious, cord-free power. It’s built around a clever system that pairs two standard 24V batteries to deliver a robust 48V performance. This means you get exceptional cutting strength while staying within the expansive Greenworks 24V platform, which offers over 200 compatible tools for your entire yard.
You’ll find the power here is both substantial and smart.
The efficient brushless motor is the heart of the system, providing increased torque for tough grass, quieter operation than gas mowers, and a longer overall lifespan for the tool. With two fully charged 5.0Ah batteries included, you can expect up to 45 minutes of runtime to tackle a typical yard, though this naturally varies with grass thickness and how you mow.
The dual-port rapid charger gets both batteries ready to go again quickly, minimizing downtime.
One of the standout features is the self-propelled rear-wheel drive. This isn’t a mower you have to push; it drives itself, making the job effortless, especially on slopes or larger lawns. You control the pace with the variable speed dial, so you can match your walking speed for maximum comfort and control.
Greenworks 60V 21" Cordless Lawn Mower – 5.0Ah Battery & Rapid Chargerr(75+ Tool Compatibility, 60Min Runtime)
The Greenworks 60V 21″ Cordless Lawn Mower with 5.0Ah Battery & Rapid Charger is designed to be a serious upgrade from both gas and older cordless models. It gives you the power you need without the downsides you don’t.
You get gas-mower performance with none of the typical headaches. This mower delivers 50% more torque than standard 40V mowers, with a blade speed that matches a 150cc gas engine. That means it can handle thick grass easily.
But you’ll never deal with fumes, loud noise, or the maintenance of oil and spark plugs again. It’s just quiet, instant power.
Its built to last in real-world conditions. The cutting deck is made from heavy-duty steel and has a rust-resistant design, and the whole mower is IPX4 rated to handle rain and damp grass. You don’t have to panic if you get caught in a drizzle or need to mow dewy lawn. The SmartCut self-sharpening blades are a game-changer.
They automatically adjust power for tall, wet, or thick grass to prevent bogging down. You also get full 4-in-1 versatility: mulch for nutrients, bag for a clean finish, side-discharge, and a special turbo mode for leaves.
Maneuvering is surprisingly easy. The mower features oversized 10-inch rear wheels and 8-inch front tires that roll smoothly over bumps and turns, reducing the effort you need to push.
Greenworks 60V 21" Self-Propelled Cordless Lawn Mower, Brushless Motor, LED Lights, Includes 2X 4.0Ah Batteries & Rapid Dual-Port Charger(75+ Tool Compatibility, 45Min Runtime)
The Greenworks 60V 21″ Self-Propelled Cordless Lawn Mower is designed to be a powerful, all-in-one solution for maintaining your lawn without the hassles of gas. It’s built around a brushless motor for efficiency and comes with two 4.0Ah batteries and a rapid dual-port charger, giving you a solid foundation to get the job done right away.
One of it’s standout features is the effortless self-propelled control.
The rear-wheel drive provides strong traction, making slopes and thick, overgrown patches much easier to handle. You can adjust your walking speed on the fly, giving you precision control without having to fight the mower. It feels like it’s working with you, not against you.
If you value a peaceful yard, this mower delivers. It operates about three times quieter than a typical gas model, so you can mow early or late without disturbing the neighborhood.
There’s no pull cord—just instant, push-button starts every time. With zero emissions, you skip the fumes and the messy maintenance of oil and gas, making your routine simpler and more eco-friendly.
The inclusion of bright LED headlights means you’re not restricted to daylight hours. You can mow from dawn to dusk, or even into the early evening if needed. For handling clippings and debris, the 4-in-1 versatility is a major plus.
21 Electric Lawn Mower Buying Guide
A 21-inch electric mower provides quiet, emission-free cutting for smaller properties. You get teh convenience of a gas mower’s cut width without the noise, fumes, or maintenance hassles. But with corded and cordless models available, how do you choose the right one for your yard? This guide walks you through the key factors to consider.
Power Source: Corded vs. Cordless
This is your first big decision. A corded mower offers unlimited runtime—great if you have an outdoor outlet and a manageable yard size. The cord is a tether, though; you’ll need to manage it around trees and flowerbeds. A cordless mower runs on a rechargeable battery, offering total freedom of movement. Just ensure the battery’s runtime matches your lawn’s square footage. For most small to mid-sized lawns, a modern lithium-ion battery will get the job done on a single charge.
Battery Voltage & Runtime
If you go cordless, pay close attention to the battery. Voltage is a good indicator of power, with 40V to 80V systems being common. Higher voltage often means more torque for thicker grass. More crucial is the amp-hour (Ah) rating of the battery, which directly affects runtime. A mower with a 5.0Ah battery will last significantly longer than one with a 2.0Ah pack. Consider buying a model that comes with a second battery; it’s a lifesaver if your lawn is pushing the limits of a single charge.
Cutting Height & Deck Material
Your grass type and preferred length matter. Look for a mower with easy, single-lever height adjustment for all wheels. This lets you quickly switch settings, ideal for seasonal changes or if you let the grass grow a bit too long. Also, check the deck construction. A durable steel deck can withstand bumps and lasts for years, while a polymer deck is lighter, rust-proof, and often more affordable. Both have their merits, so choose based on your terrain and budget.
Ease of Use & Storage
An electric mower should simplify your life. Features like a folding handle make for compact, upright storage in a garage or shed. Check the weight—lighter models are easier to maneuver, especially on slopes. Also, see how the grass clippings are handled. A simple mulch setting returns nutrients to the soil, while a bag is neat for leaf clean-up. Some models offer both. Finally, ensure any controls are intuitive and the mower feels balanced when you push it. After all, you want to spend less time working and more time enjoying your tidy lawn.
Frequently Asked Questions About 21 Electric Lawn Mower
What does teh “21” mean in a 21 electric lawn mower?
It refers to the cutting deck width, which is 21 inches. This is the swath of grass the mower cuts in one pass. It’s a common, mid-size width good for average yards.
Are electric mowers powerful enough?
Yes, modern electric mowers have plenty of power for most lawns. They handle thick grass well and provide a clean cut. You don’t need gas engine-level power for typical mowing tasks.
What’s the difference between corded and cordless?
A corded mower plugs into an outlet, giving you unlimited runtime but a limited range. A cordless mower runs on a rechargeable battery, offering total freedom but limited time per charge. Your yard size and layout will determine the best choice.
How long does a battery last?
It varies by model and battery. Typically, a good battery lasts 45 to 60 minutes on a single charge. That’s often enough for a 1/4 to 1/3 acre lot. Always check the manufacturer’s estimated runtime for the specific model.
Is it much quieter than a gas mower?
Absolutely. Electric mowers are significantly quieter. You can mow early without worrying as much about disturbing your neighbors. It’s a much more pleasant experience for you, too.
What maintenance is required?
Maintenance is very simple compared to gas mowers. You mostly just need to keep the blade sharp and clean grass clippings off the deck. There’s no oil, spark plugs, or fuel filters to deal with.
Can it handle wet grass or slight slopes?
It’s best to mow when the grass is dry for the cleanest cut and to avoid clumping. For slopes, check the mower’s manual. Most handle mild slopes fine, but steep hills can be a challenge, especially for self-propelled models.
Are they more expensive?
The upfront cost can be higher, especially for cordless models. But you save money over time on gas and maintenance. For many people, the convenience and quieter operation is worth the initial investment.
Key Takeaways
A 21-inch electric mower provides quiet, cord-free operation, a defining feature of teh products in this final roundup. This combination makes lawn care a much simpler and more pleasant weekend task. You get the freedom to move without tripping over a cord, and you can mow early without worrying about disturbing your neighbors. It’s a straightforward upgrade that saves you time and hassle.
When choosing the right model for your yard, consider your grass type and the terrain. A model with adjustable cutting heights and a robust battery life will serve you best. Ultimately, the best 21 electric lawn mower is the one that matches your specific needs and makes you feel confident about tackling your lawn. With any of these options, you’re set for a cleaner, quieter cut.