Greenworks 40V 20″ Brushless Mower – Expert Review

Key Features That Stand Out

• Powerful & Efficient: Tackle up to 1/3 acre on a single charge with the 40V 4.0Ah battery and high-torque brushless motor—3x quieter than gas, with no fumes, no oil, and instant starts. (Varies by grass conditions.)
• 4-IN-1 Versatility: Choose your cutting style: mulch for nutrients, bag for clippings, side discharge for tall grass, or turbo leaf pickup for heavy debris—all in one lightweight mower.
• LED Headlight for Flexibility: Mow early mornings or evenings with bright LED lights. Perfect for busy schedules!
• Space-saving & Easy Storage: Foldable aluminum handles save 70% space with vertical storage, and the single-lever 7-position height adjustment adapts to any lawn in seconds.
• Durable & Maintenance-Free: Steel cutting deck and brushless motor ensure long-lasting performance—no gas, no oil changes, no spark plugs, just consistent power.

Greenworks 40V 20″ Brushless Cordless Lawn Mower with 4.0Ah Battery & Charger(75+ Tool Compatibility)

Buy Now on Amazon

What We Like

• Exceptional Battery Life and Power: The 40V 4.0Ah battery paired with a high-torque brushless motor provides ample power to cover up to 1/3 acre, eliminating the need for constant recharging for medium-sized lawns. The instant starts are a game-changer compared to the pull-start frustration of gas mowers.
• Remarkable Quietness: Being 3x quieter than gas mowers means you can mow at more convenient times without disturbing neighbors, a significant advantage for suburban living.
• Versatile Cutting Options: The 4-in-1 versatility is a major selling point, offering mulching, bagging, side discharge, and even a turbo leaf pickup function, making it adaptable to various lawn conditions and needs throughout the seasons.
• User-Friendly Design: The lightweight construction, coupled with the foldable aluminum handles for 70% space saving and vertical storage, makes this mower incredibly convenient to use and store, especially in tighter garages or sheds.
• Low Maintenance: The absence of gas, oil, and spark plugs translates to a truly maintenance-free experience, saving time and money on upkeep.

Performance Analysis

• The Greenworks 40V 20″ Brushless Cordless Lawn Mower with 4.0Ah Battery & Charger(75+ Tool Compatibility) is engineered for efficiency and ease of use. Its brushless motor contributes to its powerful yet quiet operation, ensuring a clean cut without the noise pollution associated with traditional mowers. The 4.0Ah battery is substantial enough to handle a good portion of an average suburban yard, estimated at up to 1/3 acre per charge, though this can vary based on grass height and density. The mower’s ability to switch between mulching, bagging, and side discharge offers flexibility for different lawn care strategies, from fertilizing the lawn with clippings to keeping it tidy. The integrated LED headlight is a thoughtful addition, extending mowing hours into the early morning or late evening, accommodating busy schedules. Its 7-position height adjustment, controlled by a single lever, allows for quick customization to suit varying grass lengths and preferences, demonstrating practical design for everyday lawn maintenance. The durable steel deck is built to withstand regular use.

Best For

• Homeowners with medium-sized yards: The coverage of up to 1/3 acre makes it ideal for properties that aren’t excessively large but require more than a small electric mower can handle.
• Environmentally conscious consumers: Its cordless, electric design means zero emissions, contributing to cleaner air and a reduced carbon footprint.
• Individuals seeking low maintenance: Those who want to avoid the regular upkeep of gas engines (oil changes, filter replacements, etc.) will appreciate the simplicity of this electric mower.
• People with storage constraints: The vertical storage capability and foldable handles make it an excellent choice for garages, sheds, or basements where space is at a premium.
• Users who value quiet operation: Perfect for those who need to mow at less conventional times or simply prefer a more peaceful yard work experience.

Buying Guide

Key Features to Look For

• Battery Voltage and Capacity: For a 20-inch mower capable of handling up to 1/3 acre, a 40V system with a 4.0Ah battery, as found in this model, offers a good balance of power and runtime. Higher voltage generally means more power, and higher amp-hours mean longer runtimes.
• Motor Type: A brushless motor is preferable for its efficiency, durability, and longer lifespan compared to brushed motors.
• Cutting Width: A 20-inch cutting deck, like the one on this Greenworks mower, is a standard size that offers a good compromise between coverage speed and maneuverability for most residential lawns.
• Cutting Functions: Look for mowers offering at least mulching and bagging capabilities. The 4-in-1 versatility of this model, including side discharge and turbo leaf pickup, adds significant value.
• Height Adjustment: A single-lever, multi-position height adjustment system makes it quick and easy to change the cutting height.
• Storage Features: Foldable handles and vertical storage options are crucial for those with limited storage space.

Important Materials

• The Greenworks 40V 20″ Brushless Cordless Lawn Mower with 4.0Ah Battery & Charger(75+ Tool Compatibility) features a durable steel cutting deck, which is robust and designed for longevity under typical lawn mowing conditions. The handles are constructed from aluminum, contributing to the mower’s lightweight design and its easy folding for storage.

Essential Factors to Consider

• Yard Size: The stated coverage of up to 1/3 acre is a key indicator. If your yard significantly exceeds this, you may need a mower with a larger battery or multiple batteries.
• Grass Type and Density: Thick, tall grass will consume more battery power. Consider how challenging your lawn conditions are.
• Tool Compatibility: The “75+ Tool Compatibility” is a significant advantage if you already own or plan to invest in other Greenworks 40V tools, allowing battery sharing and cost savings.
• Storage Space: Evaluate your available storage before purchasing, and ensure the mower’s dimensions and storage features meet your needs.
• User Convenience: Features like LED headlights and easy height adjustment contribute to a more pleasant user experience.

Budget Planning

• Cordless electric mowers, especially those with higher voltage batteries and advanced features like brushless motors and multiple cutting functions, typically fall into a mid-to-high price range compared to corded electric or smaller gas mowers. The inclusion of a 4.0Ah battery and charger in the package represents good value for the system’s capabilities. Consider the long-term savings on fuel, oil, and maintenance that an electric mower offers.

When to Buy

• The best time to purchase a lawn mower is generally in the early spring as lawn care season begins, or in the late fall after the mowing season has concluded, as retailers may offer discounts. However, if you need a mower urgently or spot a good deal, don’t hesitate to buy it. Seasonal sales events like Memorial Day, Fourth of July, or Labor Day can also present opportunities for savings on outdoor power equipment.

Frequently Asked Questions

How long does the 4.0Ah battery typically last on a single charge?

The 4.0Ah battery is rated to cover up to 1/3 acre, but actual runtime can vary based on grass conditions, height, and the cutting mode used.

Is this mower suitable for very tall or thick grass?

The mower’s turbo leaf pickup feature is designed for heavy debris, and its powerful brushless motor can handle moderately tall and thick grass. For extremely overgrown areas, multiple passes or pre-trimming might be necessary.

What is the noise level compared to a gas mower?

This Greenworks mower is approximately 3 times quieter than a traditional gas-powered lawn mower, making it significantly less disruptive.

Can I use batteries from other Greenworks 40V tools with this mower?

Yes, the product is designed for 75+ tool compatibility, meaning batteries from other Greenworks 40V tools can be used with this mower, and vice versa, provided they are the same voltage.

How easy is it to switch between mulching, bagging, and side discharge?

The 4-in-1 versatility allows for easy switching between cutting styles, typically involving the removal or attachment of the bagging chute and potentially a mulching plug.

What kind of maintenance is required for this mower?

This mower is virtually maintenance-free, as it does not require gas, oil changes, or spark plug replacements, unlike gas mowers. Basic cleaning after use is recommended.

Final Thoughts

The Greenworks 40V 20″ Brushless Cordless Lawn Mower with 4.0Ah Battery & Charger(75+ Tool Compatibility) presents a compelling case for anyone looking to transition to a cleaner, quieter, and more convenient lawn care routine. Its blend of power, versatility, and user-friendly features, including the impressive battery coverage and space-saving design, makes it a standout option. While it’s an investment, the long-term benefits of reduced maintenance and eco-friendliness are substantial. For homeowners with medium-sized yards seeking a reliable and efficient electric mower, this Greenworks model is a highly recommended choice that genuinely simplifies yard work.