What's inside
- Quick comparison of the picks
- Best overall: Greenworks Pro 80V 25-inch self-propelled
- Best for medium lawns: Greenworks Pro 80V 21-inch self-propelled
- Best value: Greenworks Pro 80V 21-inch push mower
- Best for Lowe’s shoppers: Kobalt 80V 25-inch dual-battery
- How to choose an 80V mower
- Ownership realities
- Which one fits your situation
- 80V versus 40V and 56V mowers
- How much lawn can you mow per battery?
- Common mistakes to avoid
- Frequently Asked Questions
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The best 80-volt lawn mower for most yards is the Greenworks Pro 80V 25-inch self-propelled mower, because the wide dual-blade deck cuts a half-acre lawn in fewer passes and the 80V battery system is the largest of its kind. Smaller yards are better served by the 21-inch Greenworks 80V mowers, which are lighter and easier to store. Kobalt-branded 80V mowers are built on the same platform, and are worth checking if you shop at Lowe’s, but confirm current availability and battery compatibility before buying.
The 80V class sits above the more common 40V and 56V cordless mowers, and the extra voltage mainly buys torque in thick, wet or overgrown grass. This guide explains what each deck size is realistically suited for, the runtime math, and the ownership details such as blade wear and battery storage that matter after the first season.
Quick comparison of the picks
| Pick | Best for | Deck and drive | Key specs (per maker’s sheets) | Price range |
|---|---|---|---|---|
| Greenworks Pro 80V 25-in. self-propelled (LM2508S) | Best overall, big lawns | 25 in. steel, rear-wheel drive | Dual blade, 3-in-1, 7 heights (1-3/8 to 4-1/16 in.), about 69 lb, 4Ah kit | Premium |
| Greenworks Pro 80V 21-in. self-propelled | Best for medium lawns | 21 in., self-propelled | 3-in-1, brushless, 4Ah battery kit | Upper-mid |
| Greenworks Pro 80V 21-in. push | Best value | 21 in., push | Brushless motor, lighter frame | Mid-range |
| Kobalt 80V 25-in. dual-battery self-propelled | Best for Lowe’s shoppers | 25 in., self-propelled | Dual counter-rotating blades, two battery ports | Premium |
Best overall: Greenworks Pro 80V 25-inch self-propelled
This is the largest cordless mower in the Greenworks Pro 80V line. It has a 25-inch steel deck with dual blades, mulch, bag and side-discharge modes, seven cutting heights from about 1-3/8 to 4-1/16 inches, and variable-speed rear-wheel drive. Greenworks’ own sheet lists a weight of roughly 69 pounds and a four-year warranty on the tool and battery. The kit ships with a 4Ah battery and a 60-minute rapid charger.
The wide deck is what makes the biggest difference. A 25-inch deck cuts about 19 percent more width per pass than a 21-inch deck, which means fewer rows for the same lawn. The trade-off is maneuverability: it is harder to turn around flower beds or between tight obstacles, and the deck is awkward to store in a small shed. Owners have also noted on forums that the gearbox contains plastic parts, so avoid overloading it in tall, wet grass.
Best for medium lawns: Greenworks Pro 80V 21-inch self-propelled
For lots up to roughly a third of an acre, the 21-inch self-propelled model is a better balance. It has a brushless motor, a three-in-one deck, and self-propelled drive that spares you from pushing against slopes. A 21-inch deck fits through most gates and is easier to store upright.
The trade-off is battery strain. With a single 4Ah pack, run time is shorter than the 25-inch’s reputation suggests because the self-propel motor draws extra current. If your lawn is near the upper limit, buy a second battery.
Best value: Greenworks Pro 80V 21-inch push mower
If your yard is flat and small to medium, a push model skips the cost, weight and battery draw of the drive system. The lighter frame is simpler to lift into a vehicle or hang on a wall. Using the same 80V battery system keeps your options open for trimmers, blowers and chainsaws later.
The trade-off is effort. On slopes or thick grass you will push harder, and a self-propelled model is easier on shoulders and wrists.
Best for Lowe’s shoppers: Kobalt 80V 25-inch dual-battery
Kobalt’s 80V mower is sold through Lowe’s and follows the same system as Greenworks Pro 80V according to owner forums. The 25-inch version has dual counter-rotating blades, self-propelled drive and a two-battery design that switches to the second pack when the first runs down, which effectively doubles runtime on the same charge.
The trade-off is that Kobalt has shifted parts of its cordless lineup to other voltages in recent years, and older packs may differ. Check the current model and its battery type on the store listing before ordering, and do not assume cross-compatibility with Greenworks batteries without confirming on the maker’s page.
How to choose an 80V mower
Deck size by lawn size
Match deck width to lawn area. A 21-inch deck suits up to about 10,000 square feet, and a 25-inch deck becomes worthwhile at 10,000 to 20,000 square feet. Lawns larger than that are better with a riding mower or two batteries.
Worked runtime example
An 80V 4Ah pack stores about 320 Wh (80 x 4). If a self-propelled mower averages 600 W in medium grass, runtime is about 32 minutes before losses. At 21-inch deck width and a walking pace of roughly 2.5 mph, you cover about 21/12 x 2.5 x 5,280 = about 23,100 square feet per hour of mowing, ignoring overlap. In 32 minutes, that is about 12,300 square feet before overlap, and closer to 10,000 square feet after allowing for overlap and turns. These are planning estimates, not measured results, and grass height and moisture change them considerably.
Self-propelled versus push
Self-propelled drive adds about 10 to 15 pounds and extra battery draw, but it is a real advantage on slopes and larger lawns. Push mowers are lighter and run longer per charge.
Battery capacity
Larger battery packs of 5Ah or more deliver longer runtime, while dual-port designs let you run two packs. The 80V platform has packs from about 2Ah to 5Ah or more, so check which ones are available.
Cutting heights and mulching
Seven cutting heights is typical. Cut no more than one-third of grass blade height per mowing, which also reduces the load on the motor and battery.
Ownership realities
- Blades: sharpen or replace each season. A dull blade tears grass and raises current draw.
- Deck cleaning: scrape wet clippings from underneath after each mow, since buildup cuts airflow and efficiency.
- Battery storage: store at roughly half charge in a cool, dry place over winter, away from freezing temperatures.
- Warranty: read the terms for the battery and tool separately, since coverage can differ.
Which one fits your situation
| Lawn and need | Pick |
|---|---|
| Half-acre or more, sloped | 25-inch self-propelled |
| Up to about 10,000 sq ft, gates and tight storage | 21-inch self-propelled |
| Small flat lawn, lowest cost | 21-inch push |
| Want two-battery runtime from Lowe’s | Kobalt 80V dual-battery |
80V versus 40V and 56V mowers
Voltage alone does not decide quality, but it changes the shape of the product line. Here is how the main cordless lawn platforms compare in plain terms.
| Platform | Typical brands | Common deck sizes | Strength | Weak point |
|---|---|---|---|---|
| 80V | Greenworks Pro, Kobalt-branded 80V | 21 in. to 25 in. | High torque in thick grass, dual-blade 25 in. deck | Smaller brand ecosystem, heavier packs |
| 56V | EGO Power+ | 21 in. to 30 in. | Large pack range, strong dealer network | Priced above many rivals |
| 40V | Ryobi 40V, Greenworks 40V | 16 in. to 21 in. | Wide tool range, lower entry cost | Less torque for tall grass |
If you want the most powerful mower on a single battery, 80V and 56V are the two main choices. If you have a small yard and want a wide range of cheap tools on the same battery, 40V is more economical.
How much lawn can you mow per battery?
Using the same math as above, here is a planning table for a 21-inch self-propelled mower drawing roughly 600 W on 80V packs, including a 20 percent allowance for overlap and turns. These are estimates, not measurements, and your result will vary with grass height, moisture and slope.
| Battery | Energy | Estimated mowing time | Estimated area |
|---|---|---|---|
| 2Ah, 80V | 160 Wh | about 16 minutes | about 5,000 sq ft |
| 4Ah, 80V | 320 Wh | about 32 minutes | about 10,000 sq ft |
| 5Ah, 80V | 400 Wh | about 40 minutes | about 12,500 sq ft |
| Two 4Ah packs | 640 Wh | about 64 minutes | about 20,000 sq ft |
If your lawn is above those numbers, plan on a second battery or a two-port mower such as the Kobalt dual-battery model, so a mid-mow stop for charging does not become a weekly chore.
Common mistakes to avoid
- Buying the biggest deck for a small yard. A 25-inch mower is awkward in a small yard with garden beds and paths.
- Mowing too short. Scalping grass stresses the lawn and forces the motor to work harder. Keep at least 3 inches for cool-season grasses.
- Ignoring charger speed. A standard charger can take several hours to fill a 4Ah pack, whereas a rapid charger can do it in about an hour, so a rapid charger is worth having if you have only one battery.
- Storing with a full or empty battery. Both extremes shorten battery life. Aim for around half charge in winter.
Frequently Asked Questions
Is an 80V mower more powerful than a 40V mower?
Generally, yes. Higher voltage allows the motor to deliver power with less current, which helps in thick or wet grass. The mower’s motor and deck design also matter, so compare real specs rather than voltage alone.
How long does an 80V mower run?
Expect about 30 to 45 minutes on a 4Ah pack in average conditions. Heavy or tall grass shortens that, and a second pack extends it.
Are Kobalt 80V and Greenworks 80V batteries interchangeable?
They have been built on the same platform, according to owner forums, but this is not guaranteed for all model years. Check the manufacturer’s compatibility notes before mixing.
Can I use an 80V mower in wet grass?
You can, but wet clippings clog the deck and strain the motor. Wait until the lawn dries when possible.
Is an 80V mower worth it over gas?
For lawns under about half an acre, yes: no fuel, less noise and low maintenance. For large properties, a gas or riding mower may still be more practical.