40V vs 80V Lawn Mower: Which One Should You Buy?

40v vs 80v lawn mower side by side

Figures are manufacturer stated for the example models, collected 28 October 2026.

Voltage: what 40V and 80V mean here

The 40V example runs on two 20V 4.0Ah batteries, so its 40V platform is built from a pair of smaller batteries rather than a single 40V pack. The 80V examples each run on an 80V 4.0Ah battery, and the combo listing states its battery works with 75+ Greenworks 80V tools. The earlier voltage step is covered in our 20v vs 40v lawn mower comparison.

Voltage alone does not settle power: the 40V example states a 1200W max output, while the 80V examples state no watts figure, so no watt-for-watt comparison is possible. Judge them on deck size, stated runtime and handling instead.

Cutting deck and height

Deck width separates the sides clearly: the 40V example cuts a 17-inch path, while each 80V example is listed at 21 inches in its title and listing text (the combo spec table says 20.28 inches, as noted in its review). Height adjustment runs to 6 positions from 25 to 75 mm on the 40V example and 7 positions on each 80V example. Minimum cutting height is stated as 1.38 inches on each 80V example, while the 40V example states its range in millimetres.

One figure needs care: the push listing states a maximum height of 20.4 inches, but that matches the unit height in the same table, so its true maximum height stays unclear. The combo listing states a maximum of 3.75 inches.

Runtime and batteries

Runtime is where the 80V push example leads on stated figures. The 40V example runs up to 40 minutes on its two batteries and is rated for up to 500 m², while the 80V push example runs up to 60 minutes on its 4.0Ah battery. The 80V combo example states no runtime figure, only extended run times in general words; its title names a 60 minute rapid charger, which is charge time, not mowing time.

Battery size, at least, is directly comparable: each example states 4.0Ah batteries. The 80V push example includes a rapid charger, and the combo example includes a 4A rapid charger.

Handling and weight

Drive type splits the group: the 80V combo example is self-propelled, while the other two examples are push models. The 40V example lists a one-button switch and pull-handle start, the push example lists a push-button start, and the combo example adds LED lights.

Weight is harder to compare because the listings state different units: the 40V example weighs 14 kg, and the 80V examples weigh 74.1 pounds and 79.4 pounds. Without converting units, the fair statement is that the combo example is the heavier of the 80V pair on stated pounds.

Upkeep

All of the examples run brushless motors, and the push example states no gas, no oil and no emissions. Discharge options differ: the 40V example offers bagging and mulching with a 50L grass bag, while each 80V example offers a 3-in-1 system of mulch, rear bagging and side discharge.

The examples

Acreage and terrain fit

Greenworks 80V Combo

Greenworks 80V Push

etoolab 40V Mower

Matching It to Your Property

• A 17-inch deck fits tighter ground with beds, trees and gates to work around, while the 21-inch decks cover wider open passes.
• The self-propelled combo example moves under its own drive, while the other two examples are push models.
• The 50L grass bag on the 40V example suits bagging runs where frequent emptying would slow the job.
• One battery platform across 75+ Greenworks 80V tools keeps the combo example’s charging setup to a single system.
• The push example states no gas, no oil and no emissions, so its storage needs no fuel cans.

The Acre Score explained

The Acre Score scores each mower on performance, build, value, safety and warranty. Safety means stated safety features or certifications, and none of the examples lists one. Warranty terms are stated on the 80V examples and not on the 40V example.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.

FAQ: mowing large lots

Can a 40V mower handle a large yard?

The 40V example is rated for up to 500 m² with up to 40 minutes of runtime and a 17-inch deck, so it fits smaller lawns better. For a larger yard, the 80V push example states up to 60 minutes with a 21-inch deck.

Do the 80V examples share batteries?

The combo listing states its battery works with 75+ Greenworks 80V tools. The push listing states its own 80V 4.0Ah battery and rapid charger without naming the wider tool family.

Which example is heaviest on stated figures?

On stated pounds, the combo example at 79.4 pounds is heavier than the push example at 74.1 pounds. The 40V example states 14 kg, a different unit, so it is not ranked against them here.

Which one is easier to handle?

The self-propelled combo example does more of the moving work on its own; the other two examples are push models.

What safety gear do I need for a cordless mower?

Eye and hearing protection and sturdy shoes. Clear sticks, stones and other debris before mowing, and keep children, pets and bystanders away from the work area.

More mowing guides

• Best Push Mower for Large Yards (2026)
• 20v vs 40v Lawn Mower: Which One Should You Buy?
• Aluminum vs Steel Mower Deck: Which One Should You Buy?
• Rear Bagger vs Side Discharge Mower: Which One Should You Buy?

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