# TLDR Review: Greenworks 40V 21" Lawn Mower

*Published: 2026-07-02 | Updated: 2026-07-02 | Source: https://shopsavvy.com/reviews-tldr/greenworks-40v-21"-lawn-mower*

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## Product: Greenworks 40V 21" Lawn Mower
**Brand:** Greenworks

## 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.

## 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.

## Pros vs Cons at a Glance

| Pros | Cons |
|------|------|
| Operates without gas or oil, making it eco-friendly and environmentally conscious. | Battery life can be limited; self-propelled function drains battery quickly, necessitating additional batteries for longer sessions. |
| Lightweight design (around 70 lbs) for easy handling and maneuverability, even with one hand. | Struggles with very tall, wet, or thick grass and may bog down on inclines. |
| Self-propelled feature reduces physical effort, especially helpful on hills and for larger lawns. | Charging can be less efficient in high temperatures, possibly extending downtime. |
| Powerful 40V battery provides consistent performance and can cover up to a full acre with additional batteries. | Slightly heavier than initially expected, which may affect extended use. |
| Quiet operation enhances mowing comfort without the noise of gas engines. | Performance may be inferior to gas-powered mowers, especially in tough, dense grass. |
| Simple push-button start and easy assembly make setup quick and frustration-free. | Takes some time to reach full cutting speed and may bog on steep hills. |
| Compact, folding design allows for easy storage and can stand upright to save space. | Battery runtime of around 20-30 minutes might not be enough for larger lawns. |
| Delivers a nice cut with satisfactory results for regular lawn maintenance. | Limited battery life means more planning for bigger yards or multiple sessions. |
| Includes a 5.0Ah battery and charger, with a recharge time of about 45 minutes. | Batteries may need to be replaced sooner if used heavily. |
| Eco-friendly and low emissions, with minimal vibration and noise. |  |

## Current Prices

| Retailer | Price | Availability |
|----------|-------|-------------|
| Amazon | $298.99  | In Stock |
| Best Buy | $459.99  | In Stock |
| Exit 15 Corporation | $539.94  | In Stock |
| Bonanza | $610.99  | In Stock |

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