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Greenworks 40V 21" Brushless Cordless (Self-Propelled) Lawn Mower (75+ Compatible Tools), 5.0Ah Battery and Charger Included

TLDR Review: Greenworks 40V 21" Lawn Mower

By ShopSavvy Team

Published: July 2nd, 2026

Pros

•Operates without gas or oil, making it ecriendly and environmentally conscious.
•Lightweight design (around 70 lbs) for easy handling and maneuverability, even with one hand.
•Selropelled feature reduces physical effort, especially helpful on hills and for larger lawns.
•Powerful 40V battery provides consistent performance and can cover up to a full acre with additional batteries.
•Quiet operation enhances mowing comfort without the noise of gas engines.
•Simple pusutton start and easy assembly make setup quick and frustration-free.
•Compact, folding design allows for easy storage and can stand upright to save space.
•Delivers a nice cut with satisfactory results for regular lawn maintenance.
•Includes a 5.0Ah battery and charger, with a recharge time of about 45 minutes.
•Ecriendly and low emissions, with minimal vibration and noise.

Cons

•Battery life can be limited; selropelled function drains battery quickly, necessitating additional batteries for longer sessions.
•Struggles with very tall, wet, or thick grass and may bog down on inclines.
•Charging can be less efficient in high temperatures, possibly extending downtime.
•Slightly heavier than initially expected, which may affect extended use.
•Performance may be inferior to gaowered mowers, especially in tough, dense grass.
•Takes some time to reach full cutting speed and may bog on steep hills.
•Battery runtime of around 20 minutes might not be enough for larger lawns.
•Limited battery life means more planning for bigger yards or multiple sessions.
•Batteries may need to be replaced sooner if used heavily.

Bottom Line

For those seeking a quiet, eco-friendly alternative to traditional gas mowers, the Greenworks 40V 21" Brushless Cordless Lawn Mower is a strong contender—especially if your lawn is under an acre and you value ease of use over heavy-duty performance. Its self-propelled feature and lightweight design make for a comfortable mowing experience, but keep in mind that battery life is a little limited if you have a large or challenging yard. If extended runtime or tackling thick, tall grass regularly is a priority, you might want to consider a gas mower or an additional battery setup.

Lowest at Amazon

$298.99 at Amazon

How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 14 retailers to give you the short version.