TLDR Review: Greenworks 40V 21" Lawn Mower
Verdict
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.
- Top pro:
- Operates without gas or oil, making it eco-friendly and environmentally conscious.
- Top con:
- Battery life can be limited; self-propelled function drains battery quickly, necessitating additional batteries for longer sessions.
Pros
- •Operates without gas or oil, making it eco-friendly and environmentally conscious.
- •Lightweight design (around 70 lbs) for easy handling and maneuverability, even with one hand.
- •Self-propelled 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 push-button 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.
- •Eco-friendly and low emissions, with minimal vibration and noise.
Cons
- •Battery life can be limited; self-propelled 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 gas-powered mowers, especially in tough, dense grass.
- •Takes some time to reach full cutting speed and may bog on steep hills.
- •Battery runtime of around 20-30 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.
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How we researched this
About this review: it summarizes the professional reviews and customer ratings ShopSavvy collected for this product, alongside prices from 1 retailer in ShopSavvy's price data, most recently seen May 13, 2025.
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