Greenworks
Greenworks 80V 21" Cordless Lawn Mower: Detailed Spec Analysis
The Greenworks 80V Gen 2 is a high-voltage cordless mower that punches closer to gas-power territory than most battery mowers, pairing a wide 21-inch steel deck with rear-wheel drive self-propulsion and a push button start for a genuinely low-hassle mowing experience. The included 80V 5.0Ah battery and 3-in-1 discharge system (mulching, side discharge, rear bag) cover most residential use cases in a single package.
It's best suited to flat or gently rolling yards up to about a half-acre where zero emissions, near-silent operation, and minimal upkeep matter most.
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Last updated: . Based on our analysis of 364 lawn mowers.
What Sets It Apart
Key specification highlights based on our analysis.
21.0-Inch Cutting Deck
Wide cutting path reduces passes (walk-behind avg: 18.0 in)
Steel Cutting Deck
Durable steel deck for long-term use
3-in-1 Discharge
Mulch, side discharge, and rear bag (59 of 364 mowers have all three)
80V Battery System
High-voltage platform for more power (database avg: 38.1V)
Considerations
91.0 lbs
Heavier than average (walk-behind avg: 53.1 lbs)
Why We Recommend It
- 01.
80V battery system (well above the 38V database average) delivers sustained cutting power through thick or damp grass without bogging down
- 02.
21-inch cutting deck reduces mowing passes compared to the 18-inch walk-behind average, saving time on larger yards
- 03.
3-in-1 discharge (mulch, side, rear bag) offers full flexibility , only 59 of 364 mowers in this class include all three
- 04.
Push button start eliminates pull-cord frustration; no warm-up, no priming, no fuel mixing
- 05.
Zero oil changes, spark plugs, or fuel system maintenance , long-term ownership costs stay low
Considerations
- 01.
At 91 lbs, this mower is significantly heavier than the 53-lb walk-behind average, making it harder to lift, transport, or store vertically
- 02.
Battery runtime is inconsistent in user reports , some users complete a half-acre on one charge, while others report the 5.0Ah battery depleting in as little as 20 minutes under heavy load
- 03.
Rated 'adequate' for hilly terrain , rear-wheel drive helps, but the 91-lb weight can be fatiguing on steeper grades even with self-propulsion engaged
Technical Specifications
| Feature | Specification |
|---|---|
| Mower Type | Self propelled |
| Power Source | Battery |
| Cutting Width | 21" |
| Deck Material | Steel |
| Blade Type | Rotary |
| Height Positions | 7 |
| Battery | 80V 5Ah |
| Drive | Rear wheel |
| Discharge | 3-in-1 (Mulch, Side, Bag) |
| Weight | 91 lbs |
| Start Type | Push button |
Power & Performance
Running on an 80V platform , more than double the voltage of many entry-level cordless mowers , the Greenworks Gen 2 generates enough torque to handle established turf, slightly overgrown grass, and varying grass heights without the motor lugging. The high-voltage system maintains blade speed more consistently under load compared to 40V or 60V alternatives, which matters when tackling damp or dense growth.
That said, real-world performance still depends on battery charge level; pushing into thick, wet grass on a partially depleted 5.0Ah battery will shorten runtime noticeably.
Cutting System
The 21-inch steel cutting deck is 3 inches wider than the walk-behind average, which translates to roughly 15% fewer passes per mowing session , a meaningful time saving on any yard over 5,000 square feet. Steel construction offers durability over composite decks for long-term use, and the rotary blade system handles standard turf effectively.
Seven height positions controlled by a single lever give fine-grained adjustment across a practical range, and all three discharge modes , mulching for nutrient return, side discharge for speed, and rear bag for a clean finish , are included without add-on purchases.
Drive & Handling
Rear-wheel drive self-propulsion is the right choice for anything beyond a flat driveway: it keeps traction where the weight sits and pulls the mower forward without the front wheels losing grip on inclines. The tradeoff is weight , at 91 lbs this is a heavy machine, and while the self-propelled drive absorbs forward effort, backing up, turning, or lifting the mower remains physically demanding.
The variable-speed drive and standard walk-behind handle design work well on open flat areas but require more effort when navigating tight corners or uneven terrain.
Battery / Fuel
The included 80V 5.0Ah battery provides a theoretical energy capacity of 400Wh, which is substantial for a cordless mower. In practice, runtime varies considerably based on grass density, height, and terrain , many users complete 1/4 to 1/2 acre per charge, but those pushing through thick or overgrown turf report the battery depleting faster.
The charger is included in the box. Because this is part of Greenworks' 80V platform, the battery is compatible with other Greenworks 80V tools, including the blower bundled in this package.
Who Is This Mower For?
Ideal For
- ✓ Suburban homeowners with flat to gently sloped yards up to 1/2 acre who want cordless convenience without cord-length restrictions
- ✓ Eco-conscious users who want zero direct emissions and quieter operation than gas , neighbors and early-morning mowing sessions both benefit
- ✓ Low-maintenance seekers: no oil, no spark plugs, no fuel stabilizer , just charge and mow
- ✓ Upgraders from a basic push mower who want self-propelled rear-wheel drive and a wider 21-inch deck size without switching to gas
Not Ideal For
- ✕ Owners of large properties over 3/4 acre where battery runtime uncertainty becomes a real risk mid-session
- ✕ Users with steep or heavily terraced yards , the 91-lb weight can be difficult to control even with self-propulsion, and the adequate hill rating reflects real limits
- ✕ Anyone with very limited storage space: the weight makes vertical storage impractical and this mower needs a dedicated floor footprint
Customer feedback consistently rates assembly as easy and straightforward, with most users completing setup without tools or with minimal hardware in under 30 minutes. The push button start means there's no carburetor priming or choke adjustment to figure out , attach the handle, insert the battery, and mow.
Charge the 5.0Ah battery fully before the first use to establish accurate runtime expectations for your specific yard conditions
Set the single-lever cutting height before you start , adjusting it mid-mow on a heavy machine is awkward; dial it in on the driveway first
Greenworks typically backs its 80V platform tools with a 4-year tool warranty and 2-year battery warranty, but confirm current terms directly with Greenworks or the retailer at point of purchase, as warranty coverage can vary by bundle and sales channel.
FAQ
How long does the 80V 5.0Ah battery last on a single charge?
Runtime varies based on grass conditions and terrain. Most users report completing 1/4 to 1/2 acre per charge under normal conditions.
However, thick, tall, or wet grass significantly increases power draw, and some users report the battery depleting in as little as 20 minutes in demanding conditions. For yards over 1/2 acre, having a second 80V battery on hand is worth considering.
Is the Greenworks 80V self-propelled mower good for hills?
The rear-wheel drive self-propulsion is better suited to slopes than front-wheel drive because traction stays where the weight is. That said, at 91 lbs this is a heavy machine, and the mower is rated 'adequate' rather than 'excellent' for hilly terrain.
Gentle to moderate slopes are manageable; steep grades will be physically demanding even with the drive engaged.
Does the deck size on this mower make a real difference in mowing time?
Yes , the 21-inch cutting deck is wider than the typical 18-inch walk-behind average, meaning you cover more ground per pass. On a 5,000 square foot lawn that difference translates to roughly 15% fewer strips to walk, which adds up to real time saved over a full season.
Can I use the 80V battery with other Greenworks tools?
Yes, the 80V 5.0Ah battery is part of Greenworks' shared 80V battery platform and works across other compatible Greenworks 80V tools. This bundle specifically includes an 80V blower alongside the mower, so the battery and charger serve both tools right out of the box.
Does this mower support mulching, and is the rear bag included?
Yes , this is a true 3-in-1 discharge mower. Mulching returns clippings to the lawn as nutrients, side discharge moves clippings out quickly during heavy mowing, and the rear bag collects clippings for a clean finish.
All three options are included; no separate accessory purchases are needed.
How does the push button start work, and do I ever need to pull a cord?
The push button start is fully electric , insert the charged 80V battery, press the button, and the blade engages. There is no pull cord, no choke, no priming sequence.
This is one of the most practical day-to-day advantages of battery-powered mowers over gas models, especially for users who found pull-start engines frustrating.
Bottom Line
The Greenworks 80V Gen 2 is one of the more capable cordless mowers available, offering a wide 21-inch steel deck, true rear-wheel drive self-propulsion, 3-in-1 discharge, and high-voltage performance in a package that eliminates all gas maintenance. The main caveats are its 91-lb weight , noticeably heavier than average , and battery runtime that can fall short in tough grass conditions.
For flat to gently rolling suburban yards where low-maintenance and quiet operation are priorities, this mower is a strong choice.
Best for suburban homeowners with flat to moderate yards up to 1/2 acre who want cordless power, zero maintenance, and all-in-one mulching capability.
Consider alternatives if you have steep terrain, consistently thick or overgrown grass, or a large property where runtime uncertainty isn't acceptable.
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