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80V 21" GEN 2 Cordless Battery 4-in-1 Push Lawn Mower(Auto Switch) w/ 4.0Ah Battery & Charger

SKU 2541202 | MODEL# LMB454
Sale price
$ 649 .99

Mow the toughest yards with 2x more torque!

  • Acreage: Up to 1/2 acre
  • Runtime: Up to 40min. (w/ included battery)
  • Battery Recharge Time: 60 minutes per battery w/ included charger
  • 4-in-1 System: Mulch, Bag, Side Discharge, Turbo Leaf Pickup
  • High-intensity LED Headlights: Optimal visibility and safety during your mowing
  • EZ Fold™ Handles: Simple to use - taking up to 70% less space
  • Auto-Switch Technology: Achieve longer time with Auto-Switch Tech
  • Warranty: 4-year tool and battery limited warranty
  • Power 75+ Tools with any Greenworks 80V Battery
  • What's Included: (1) 4Ah 80V Battery and (1) 4A Rapid Charger
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80V 21" GEN 2 Cordless Battery 4-in-1 Push Lawn Mower(Auto Switch) w/ 4.0Ah Battery & Charger
Key Features Get answers to all the questions you might have in your mind for this product
80V 21" GEN 2 Cordless Battery 4-in-1 Push Lawn Mower(Auto Switch) w/ 4.0Ah Battery & Charger
  • Intelligent Brushless Motor Technology - 2x more torque, more power, longer runtimes, quiet operation, and extended motor life.
  • Innovative SmartCut Technology - Senses grass and auto-adapts power for the perfect cut. Effortless to mow because it's self-propelled, no sweat!
  • EZ Fold handles are simple to use - Just pull, fold, and store in seconds - taking up to 70% less space.
  • Dual battery ports with Auto Switch™ technology - when one battery depletes, the mower's power supply is automatically switched to the second battery
  • 4-in-1 cutting deck lets you choose your cut finish from mulching, bagging, side discharge, or turbo mode for leaf pick up.
  • Removable battery powers over 75 Greenworks 80-Volt tools
Specifications & Guides Find specifications as well as additional supporting information about our product
Battery Type Lithium-ion
Steel Stamped Deck 21-inch
Mowing Capability 4-in-1
Cutting Heights 7
Maximum Blade Speed 3200 RPM
Intelligent Motor Brushless
LED Headlights? Yes
Maximize Performance Autoswitch

Product Specifications

Product Warranty 4 Years
Battery Warranty 4 Years
Package Dimensions 37.4"Lx23.6"Wx17.5"H
Product Weight 60.6lbs
Front Wheel Size 8"
Rear Wheel Size 10"
Height Adjustment 7
Min. Cut Height 1 3/8"
Max Cut Height 4"
Voltage 80V
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Additional Details More information about this product

2x more torque takes the work out of yard work

Powerfully smart. Tackle the toughest yards, one-handed, because our smart mowers never bog down. When grass gets thick, tall, or wet, Greenworks sensors tell our brushless motor to rush power to the mower blades. The end result? The perfect lawn, every time.

Powerfully tough. The deck is forged with heavy-duty steel, ready to tackle any terrain. Add in algorithms and a brushless motor to reach unrivaled blade speed. Ka-pow!

Powerfully easy. Simple to start with just the push of a button. Gentle on the ears because it mows quietly. A cinch to store in small spacesm, you can even hang it up if you want to.

Additional features include a 4-in-1 cutting deck lets you choose your cut finish from mulching, bagging, side discharge, or turbo mode for leaf pick up

Zero gas smell. Zero pull cords. Zero maintenance. Zero pollution breathed. Zero time wasted.

 

Does this Greenworks mower run off of one battery?

Yes, while it is possible for this mower to operate using just one battery, it is worth noting that it comes equipped with two active battery ports, enabling you to add a second battery and extend your runtime.

Key features

  • 21" Deck Size - Durable steel that plows through the tallest grass
  • Push Button Start - Press and mow, no more cord yanking
  • Intelligent Brushless Motor Technology - 2x more torque, more power, longer runtimes, quiet operation, and extended motor life
  • SmartCut™ Technology - Senses grass and auto-adapts power for the perfect cut
  • Dual battery ports with Auto Switch™ technology - when one battery depletes, the mower's power supply is automatically switched to the second battery
  • EZ Fold™ handles are simple to use - Just pull, fold, and store in seconds - taking up to 70% less space
  • 4-in-1 cutting deck lets you choose your cut finish from mulching, bagging, side discharge, or turbo mode for leaf pick up
  • Single lever 7-position height adjustment offers a range of cutting heights to meet your specific needs
  • Maneuver terrain easily with 10" rear wheels and 8" front wheels
  • Battery Powers 75+ 80V Products - One battery to mow, blow, cut, trim, cultivate, and more!

The No List

No Gas Smell. 

No Emissions. 

No Maintenance. 

Low Noise. 

What's Included Everything that comes with this product
  • (1) Pro 80V 21" Brushless Push Lawn Mower
  • (1) 4.0 Ah Battery
  • (1) Battery Charger
  • (1) Grass Catcher Bag
  • (1) Owner's Manual
Help & FAQ Answers to the most frequently asked questions

Can I use my Greenworks mower on hills and slopes? faq-icon

Walk behind mower units should not be operated on slopes greater than 15 degrees. This is not a limitation of the unit, but rather to ensure safe footing for the user. When mowing on a hill remember to mow across rather than up and down.

What maintenance is required for my Greenworks mower? faq-icon

Greenworks mower units require much less maintenance than a traditional gas unit. However, It will still require routine seasonal maintenance. After each use we advise emptying the bag (if bagging has been used), then check/clean off debris on the side discharge, rear slot, clean the underside of the deck with a cloth and wipe the unit down. If there is harder debris stuck to the underside, you may want to use a rubber deck scraper. Make sure to check the unit for loose nuts and bolts after use and secure if needed. Do not expose this unit to water. Check the blade for any damage/dullness and replace or sharpen as needed. Store the unit in a cool/covered and dry location such as garage or shed.

When should I cut my grass? faq-icon

Here are some mowing tips that may be helpful: • Mow when grass is dry. Mow no more than 1/3 of the length of grass at a time. • Mow in the morning or late afternoon to reduce the heat stress on the newly cut grass. • Alternate mowing patterns each time you mow. As grass develops a grain based on your cutting direction it will lean towards the direction of your mowing path. Changing the pattern allows better vertical growth and helps to keep the cut neater. • Consider mulching. To mulch, remove the bag and insert the mulch plug into the rear of the unit. This will leave the clippings on the lawn allowing the nutrients and nitrogen contained within them to return to the soil and allow the remaining grass to recycle them (always discharge the mulch towards a previously cut area to prevent your mower from bogging down). • Leave grass a little higher in shaded areas. This keeps them healthy in relatively nutrient poor conditions. • Always keep in mind what conditions your variety of grass prefers. If your grass prefers cooler climates, reduce the frequency with which you mow and increase the cutting height of your mower during hot seasons to compensate for the reduced growth rate these varieties may experience in this type of weather.

Do I always need to use my self-propelled feature when operating a self-propelled mower? faq-icon

No, you do not have to engage the self-propelled feature to operate a self-propelled unit. There are two separate motors. Familiarize yourself with the self-propelled feature and the cutting feature of your unit (instruction inside the manual). Once you understand these two features you can engage the blade without using the self-propelled feature.

Can my Greenworks mower cut up pinecones, branches, twigs, and other yard debris laying on my lawn? faq-icon

Greenworks mower are designed for grass, weeds, and foliage. It would not be advisable to depend on the mower to mulch any other types of debris. Before operation please thoroughly inspect the area where the mower is to be used. Remove all stones, sticks, wire, toys, and other objects that could be tripped over or thrown by the blade. Thrown objects can cause serious personal injury.

Can I use my mower in wet conditions such as rain? faq-icon

For safety reasons (which can be found inside your owner's manual under safety information) we advise not using the mower in wet conditions as unstable footing could cause operators to slip, causing a potential hazard. *60V X-RANGE line which features IPX4 weather-resistant construction and can be safely used in damp conditions. Be mindful of your footing during use in potentially slippery conditions. *

What does SmartCut™mean? faq-icon

The SmartCut™ feature, also considered a Power Save feature, is designed to maximize run time and battery life by automatically detecting the length of grass and adjusting its power or throttle up when needed. With this feature, the rotational speed of the blades will not always stay the same. They will spin faster automatically when you hit thicker grass.

Does my Greenworks mower unit require gas or oil? faq-icon

No, gas and oil are not required for the operation our units. Greenworks mowers are either battery operated or corded (extension cord sold separately). This information can be seen on the product page of each tool and inside the owner’s manual.

Is the battery from my Greenworks mower interchangeable with the other units? faq-icon

Greenworks offers a variety of different voltage lines for a wide range of individual residential needs. For example, we offer: 24v, 40v, 60v and 80v. Each voltage line has their own set of interchangeable tools and batteries but are not interchangeable across different voltage lines. To see compatible tools within each voltage line select shop by platform on our site. If you’re still unsure if your unit is compatible, please contact us at [email protected] for further assistance. We’re happy to help

How do I start my mower unit? faq-icon

For corded units, ensure you have the correct extension cord (reference the owner’s manual) and power from your outlet. If you’re using a battery unit, ensure the battery has a full/adequate charge. Make sure you are starting the unit in the following order, or it will not start: 1. Push down the safety switch button, while pressing the safety switch button with one hand, use your other hand to simultaneously pull the bale switch towards you. 2. Once the machine turns on you can let go of the safety button and continue to hold the bale (lever) handle. 3. The unit will only start when the safety button is pressed first, followed by the bale switch. If it is reversed the unit will not power on. For some of our EZ Fold™ units the start sequence will not affect the unit. Use the correct batteries according to the unit and ensure the batteries have adequate charge, you can either push the button first or pull up the handle. These models are not affected by the start order. However, please always refer to your owner’s manual for verification on the starting process as this would be the most accurate source of information.
About Greenworks See how Greenworks is always making life better
20+ Years of Battery-First Innovation.

We’ve been pioneers of battery-powered outdoor tools since 2002, designing smarter tools with battery technology at their core to get work done faster.

#1 Battery Brand for Commercial Landscapers.

Trusted by professionals worldwide for performance, durability, and reliability, our tools are built to handle real-world all-day work.

Power That Replaces Gas Without the Hassle.

Sustainable technology delivers more power, longer runtimes, and zero gas, fumes, or engine maintenance, saving you time, money, and trouble.

One Battery. Endless Possibilities.

Choose the right voltage platform for your needs and share batteries across hundreds of tools in the yard, garage, jobsite, and beyond.

Smartly Designed. Built to Last.

Designed and engineered in-house for cleaner, quieter, smarter performance, with purpose-driven features that fit seamlessly into everyday life.

Proven Across 500+ Tools and Applications.

From maintaining your backyard to powering large jobsites, our battery expertise scales across 500+ professional and consumer tools built for real-world use.

Key Features
  • Intelligent Brushless Motor Technology - 2x more torque, more power, longer runtimes, quiet operation, and extended motor life.
  • Innovative SmartCut Technology - Senses grass and auto-adapts power for the perfect cut. Effortless to mow because it's self-propelled, no sweat!
  • EZ Fold handles are simple to use - Just pull, fold, and store in seconds - taking up to 70% less space.
  • Dual battery ports with Auto Switch™ technology - when one battery depletes, the mower's power supply is automatically switched to the second battery
  • 4-in-1 cutting deck lets you choose your cut finish from mulching, bagging, side discharge, or turbo mode for leaf pick up.
  • Removable battery powers over 75 Greenworks 80-Volt tools
80V 21" GEN 2 Cordless Battery 4-in-1 Push Lawn Mower(Auto Switch) w/ 4.0Ah Battery & Charger
Specifications & Guides
Battery Type Lithium-ion
Steel Stamped Deck 21-inch
Mowing Capability 4-in-1
Cutting Heights 7
Maximum Blade Speed 3200 RPM
Intelligent Motor Brushless
LED Headlights? Yes
Maximize Performance Autoswitch

Product Specifications

Product Warranty 4 Years
Battery Warranty 4 Years
Package Dimensions 37.4"Lx23.6"Wx17.5"H
Product Weight 60.6lbs
Front Wheel Size 8"
Rear Wheel Size 10"
Height Adjustment 7
Min. Cut Height 1 3/8"
Max Cut Height 4"
Voltage 80V
How to video

Loading title...

How to video

Loading title...

How to video

Loading title...

How to video

Loading title...

Additional Details

2x more torque takes the work out of yard work

Powerfully smart. Tackle the toughest yards, one-handed, because our smart mowers never bog down. When grass gets thick, tall, or wet, Greenworks sensors tell our brushless motor to rush power to the mower blades. The end result? The perfect lawn, every time.

Powerfully tough. The deck is forged with heavy-duty steel, ready to tackle any terrain. Add in algorithms and a brushless motor to reach unrivaled blade speed. Ka-pow!

Powerfully easy. Simple to start with just the push of a button. Gentle on the ears because it mows quietly. A cinch to store in small spacesm, you can even hang it up if you want to.

Additional features include a 4-in-1 cutting deck lets you choose your cut finish from mulching, bagging, side discharge, or turbo mode for leaf pick up

Zero gas smell. Zero pull cords. Zero maintenance. Zero pollution breathed. Zero time wasted.

 

Does this Greenworks mower run off of one battery?

Yes, while it is possible for this mower to operate using just one battery, it is worth noting that it comes equipped with two active battery ports, enabling you to add a second battery and extend your runtime.

Key features

  • 21" Deck Size - Durable steel that plows through the tallest grass
  • Push Button Start - Press and mow, no more cord yanking
  • Intelligent Brushless Motor Technology - 2x more torque, more power, longer runtimes, quiet operation, and extended motor life
  • SmartCut™ Technology - Senses grass and auto-adapts power for the perfect cut
  • Dual battery ports with Auto Switch™ technology - when one battery depletes, the mower's power supply is automatically switched to the second battery
  • EZ Fold™ handles are simple to use - Just pull, fold, and store in seconds - taking up to 70% less space
  • 4-in-1 cutting deck lets you choose your cut finish from mulching, bagging, side discharge, or turbo mode for leaf pick up
  • Single lever 7-position height adjustment offers a range of cutting heights to meet your specific needs
  • Maneuver terrain easily with 10" rear wheels and 8" front wheels
  • Battery Powers 75+ 80V Products - One battery to mow, blow, cut, trim, cultivate, and more!

The No List

No Gas Smell. 

No Emissions. 

No Maintenance. 

Low Noise. 

What's Included
  • (1) Pro 80V 21" Brushless Push Lawn Mower
  • (1) 4.0 Ah Battery
  • (1) Battery Charger
  • (1) Grass Catcher Bag
  • (1) Owner's Manual
Help & FAQ

Can I use my Greenworks mower on hills and slopes? faq-icon

Walk behind mower units should not be operated on slopes greater than 15 degrees. This is not a limitation of the unit, but rather to ensure safe footing for the user. When mowing on a hill remember to mow across rather than up and down.

What maintenance is required for my Greenworks mower? faq-icon

Greenworks mower units require much less maintenance than a traditional gas unit. However, It will still require routine seasonal maintenance. After each use we advise emptying the bag (if bagging has been used), then check/clean off debris on the side discharge, rear slot, clean the underside of the deck with a cloth and wipe the unit down. If there is harder debris stuck to the underside, you may want to use a rubber deck scraper. Make sure to check the unit for loose nuts and bolts after use and secure if needed. Do not expose this unit to water. Check the blade for any damage/dullness and replace or sharpen as needed. Store the unit in a cool/covered and dry location such as garage or shed.

When should I cut my grass? faq-icon

Here are some mowing tips that may be helpful: • Mow when grass is dry. Mow no more than 1/3 of the length of grass at a time. • Mow in the morning or late afternoon to reduce the heat stress on the newly cut grass. • Alternate mowing patterns each time you mow. As grass develops a grain based on your cutting direction it will lean towards the direction of your mowing path. Changing the pattern allows better vertical growth and helps to keep the cut neater. • Consider mulching. To mulch, remove the bag and insert the mulch plug into the rear of the unit. This will leave the clippings on the lawn allowing the nutrients and nitrogen contained within them to return to the soil and allow the remaining grass to recycle them (always discharge the mulch towards a previously cut area to prevent your mower from bogging down). • Leave grass a little higher in shaded areas. This keeps them healthy in relatively nutrient poor conditions. • Always keep in mind what conditions your variety of grass prefers. If your grass prefers cooler climates, reduce the frequency with which you mow and increase the cutting height of your mower during hot seasons to compensate for the reduced growth rate these varieties may experience in this type of weather.

Do I always need to use my self-propelled feature when operating a self-propelled mower? faq-icon

No, you do not have to engage the self-propelled feature to operate a self-propelled unit. There are two separate motors. Familiarize yourself with the self-propelled feature and the cutting feature of your unit (instruction inside the manual). Once you understand these two features you can engage the blade without using the self-propelled feature.

Can my Greenworks mower cut up pinecones, branches, twigs, and other yard debris laying on my lawn? faq-icon

Greenworks mower are designed for grass, weeds, and foliage. It would not be advisable to depend on the mower to mulch any other types of debris. Before operation please thoroughly inspect the area where the mower is to be used. Remove all stones, sticks, wire, toys, and other objects that could be tripped over or thrown by the blade. Thrown objects can cause serious personal injury.

Can I use my mower in wet conditions such as rain? faq-icon

For safety reasons (which can be found inside your owner's manual under safety information) we advise not using the mower in wet conditions as unstable footing could cause operators to slip, causing a potential hazard. *60V X-RANGE line which features IPX4 weather-resistant construction and can be safely used in damp conditions. Be mindful of your footing during use in potentially slippery conditions. *

What does SmartCut™mean? faq-icon

The SmartCut™ feature, also considered a Power Save feature, is designed to maximize run time and battery life by automatically detecting the length of grass and adjusting its power or throttle up when needed. With this feature, the rotational speed of the blades will not always stay the same. They will spin faster automatically when you hit thicker grass.

Does my Greenworks mower unit require gas or oil? faq-icon

No, gas and oil are not required for the operation our units. Greenworks mowers are either battery operated or corded (extension cord sold separately). This information can be seen on the product page of each tool and inside the owner’s manual.

Is the battery from my Greenworks mower interchangeable with the other units? faq-icon

Greenworks offers a variety of different voltage lines for a wide range of individual residential needs. For example, we offer: 24v, 40v, 60v and 80v. Each voltage line has their own set of interchangeable tools and batteries but are not interchangeable across different voltage lines. To see compatible tools within each voltage line select shop by platform on our site. If you’re still unsure if your unit is compatible, please contact us at [email protected] for further assistance. We’re happy to help

How do I start my mower unit? faq-icon

For corded units, ensure you have the correct extension cord (reference the owner’s manual) and power from your outlet. If you’re using a battery unit, ensure the battery has a full/adequate charge. Make sure you are starting the unit in the following order, or it will not start: 1. Push down the safety switch button, while pressing the safety switch button with one hand, use your other hand to simultaneously pull the bale switch towards you. 2. Once the machine turns on you can let go of the safety button and continue to hold the bale (lever) handle. 3. The unit will only start when the safety button is pressed first, followed by the bale switch. If it is reversed the unit will not power on. For some of our EZ Fold™ units the start sequence will not affect the unit. Use the correct batteries according to the unit and ensure the batteries have adequate charge, you can either push the button first or pull up the handle. These models are not affected by the start order. However, please always refer to your owner’s manual for verification on the starting process as this would be the most accurate source of information.
About Greenworks
20+ Years of Battery-First Innovation.

We’ve been pioneers of battery-powered outdoor tools since 2002, designing smarter tools with battery technology at their core to get work done faster.

#1 Battery Brand for Commercial Landscapers.

Trusted by professionals worldwide for performance, durability, and reliability, our tools are built to handle real-world all-day work.

Power That Replaces Gas Without the Hassle.

Sustainable technology delivers more power, longer runtimes, and zero gas, fumes, or engine maintenance, saving you time, money, and trouble.

One Battery. Endless Possibilities.

Choose the right voltage platform for your needs and share batteries across hundreds of tools in the yard, garage, jobsite, and beyond.

Smartly Designed. Built to Last.

Designed and engineered in-house for cleaner, quieter, smarter performance, with purpose-driven features that fit seamlessly into everyday life.

Proven Across 500+ Tools and Applications.

From maintaining your backyard to powering large jobsites, our battery expertise scales across 500+ professional and consumer tools built for real-world use.

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