20v vs 40v Lawn Mower: Which One Should You Buy?
20v and 40v lawn mowers compared on deck size, runtime, battery size and height settings, with two 20V examples and one 40V example.
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Top picks at a glance
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- 1
Gewol 20V Cordless Lawn Mower 13 in 2x4.0Ah9.5/10View on Amazon - 2
Worx Cordless Lawn Mower9.5/10View on Amazon - 3
Worx Cordless Lawn Mower9.5/10View on Amazon - 4
BLACK+DECKER Electric Lawn MowerView on Amazon - 5
BLACK+DECKER 3-in-1 String Trimmer/Edger & Lawn MowerView on Amazon - 6
American Lawn Mower 50514 14" 11-Amp Corded Electric LawnView on Amazon - 7
LawnMaster MEB1114K Electric Corded Lawn Mower 15-Inch 11AMPView on Amazon - 8
BLACK+DECKER Electric Lawn Mower with Bike HandleView on Amazon
Verdict: Choose a 20v lawn mower if a smaller deck suits the lawn, and the Litheli and woRkologie examples below fit that job. Choose a 40v lawn mower if the widest deck in this comparison matters most, and the Skil example below fits that job. Voltage alone does not decide the winner: deck size, battery size and runtime differ by example, not by voltage alone.
A lawn with beds, paths, trees and open grass asks a mower to do more than cut a straight strip. The 20v vs 40v lawn mower question is organized by voltage platform, and this comparison sets out how the examples differ on deck size, battery size, runtime and height settings. This comparison covers the differences, then the examples from the listings reviewed.
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| # | Product | Acre Score | Buy |
|---|---|---|---|
| 1 |  Skil 40V 20-Inch Push Mower Kit | 9.6/10 | Buy on Amazon |
| 2 |  Litheli 13-Inch Cordless Lawn Mower | 9.5/10 | Buy on Amazon |
| 3 |  woRkologie 16-Inch Cordless Lawn Mower | 9.4/10 | Buy on Amazon |
Skil 40V 20-Inch Push Mower Kit
A 40V brushless push mower kit with a 20-inch deck, a 6.0Ah battery, a 150W charger, push-button start and IPX4 weather resistance.
Read the full review
The Skil example is the 40v mower in this comparison. The listing states a 40V brushless motor, a 20-inch deck, a 6.0Ah battery, a 150W charger, a push-button start, a telescoping handle that folds for vertical storage, 7 height settings, 2-in-1 bagging or mulching, and IPX4 weather resistance. The title states a 20-inch deck, while the spec table lists a cutting width of 3 inches; this comparison trusts the title.
The listing claims 25% longer run time and 2X battery life for its PWR CORE 40 battery, but it states no runtime in minutes and no weight, so those points stay unclear in this comparison. No warranty term is stated on the listing.
Pros
- 20-inch deck, the widest here
- 6.0Ah battery with 150W charger
- Push-button start
- IPX4 weather resistance
Cons
- No runtime minutes stated
- No weight stated
- Spec table lists a 3 inch cutting width, against the title's 20 inches
- No warranty term stated
Litheli 13-Inch Cordless Lawn Mower
A 20V cordless mower with a 13-inch deck, two 4.0Ah batteries, five height positions and an 8-gallon bag.
Read the full review
The Litheli example is the smaller 20v mower in this comparison. The listing states a 13-inch deck, a 3400 RPM speed, two 4.0Ah batteries, a 30 minute runtime, 5 height positions from 1 to 2.5 inches, an 8-gallon bag, a folding handle and a carrying handle. The title and bullets state a 13-inch deck, while the spec table lists a cutting width of 21 inches; this comparison trusts the title and bullets.
The listing states a 3 year warranty for the whole machine and a 1 year warranty for the battery, and notes that the batteries can also charge phones, computers and tablets. The listing states up to 2600 sq. ft. of medium-sized lawn on a full charge.
Pros
- 2 x 4.0Ah batteries included
- 5 height positions from 1 to 2.5 inches
- 8-gallon bag
- 3 year machine warranty and 1 year battery warranty
Cons
- 13-inch deck is the narrowest here
- 30 minute runtime stated
- Spec table lists a 21 inch cutting width, against the title's 13 inches
- Bagging only stated, no mulching mode
woRkologie 16-Inch Cordless Lawn Mower
A 20V cordless mower with a 16-inch deck, dual 5.0Ah batteries, a 3900 RPM brushless motor and 2-in-1 bagging and mulching.
Read the full review
The woRkologie example is the larger 20v mower in this comparison. The listing states a 16-inch deck, dual 20V 5.0Ah batteries, a 3900 RPM brushless motor, a 45W charger, a 40 minute runtime, 6-position height adjustment from 1 to 3 inches, a 13.2-gallon bag and 2-in-1 bagging or mulching. The bullets state a weight of 28 pounds, while the spec table states 30 pounds; this comparison trusts the bullets.
The title names both a 6-position adjustment and a 3-level adjustment; the bullets describe the 6-position range from 1 to 3 inches. The listing states the batteries are compatible with DeWalt 20V tools. No warranty term is stated on the listing.
Pros
- 16-inch deck
- Dual 20V 5.0Ah batteries with 45W fast charger
- 3900 RPM brushless motor
- 2-in-1 bagging and mulching with 13.2-gallon bag
Cons
- Bullets state 28 pounds while the spec table states 30 pounds
- Title names both 6-position and 3-level height adjustment
- No warranty term stated
- No push-button start stated
Other machines to compare
BLACK+DECKER Electric Lawn MowerCheck price on Amazon
BLACK+DECKER 3-in-1 String Trimmer/Edger & Lawn MowerCheck price on Amazon
American Lawn Mower 50514 14" 11-Amp Corded Electric LawnCheck price on Amazon
LawnMaster MEB1114K Electric Corded Lawn Mower 15-Inch 11AMPCheck price on Amazon
BLACK+DECKER Electric Lawn Mower with Bike HandleCheck price on Amazon
20v vs 40v lawn mower side by side
| Factor | Skil 40V 20-Inch | Litheli 13-Inch | woRkologie 16-Inch |
|---|---|---|---|
| Voltage | 40V | 20V | 20V |
| Cutting width | 20 inches | 13 inches | 16 inches |
| Battery | 6.0Ah | 2 x 4.0Ah | 2 x 5.0Ah |
| Runtime | Not stated | 30 minutes | 40 minutes |
| Speed | Not stated | 3400 RPM | 3900 RPM |
| Height settings | 7 settings | 5 positions, 1 to 2.5 inches | 6 positions, 1 to 3 inches |
| Bag | Grass bag included | 8-gallon bag | 13.2-gallon bag |
| Weight | Not stated | Not stated | 28 pounds |
| Warranty | Not stated | 3 years machine, 1 year battery | Not stated |
Figures are manufacturer stated for the example models, collected 27 October 2026.
Voltage and cutting width
The two 20v examples list different deck sizes: the Litheli example lists a 13-inch deck, and the woRkologie example lists a 16-inch deck. The 40v example lists a 20-inch deck. Those widths belong to the example models, not to voltage itself, so a wider example does not make its whole side wider. The titles and bullets on both sides state deck size, so this comparison can rank the examples on deck size, but not the voltage platforms as a rule.
Battery size also splits the examples. The Litheli example includes two 4.0Ah batteries, the woRkologie example includes dual 20V 5.0Ah batteries, and the Skil example includes a 6.0Ah battery with a 150W charger. Runtime follows the same split: the Litheli example states 30 minutes, the woRkologie example states 40 minutes, and the Skil listing states no runtime in minutes, so this comparison does not rank the sides on runtime.
Handling and upkeep
Handling comes from handle design, starting and height settings. All three examples list a folding handle for storage, and the Skil example adds a telescoping handle and a push-button start. Height settings run from 5 positions on the Litheli example, from 1 to 2.5 inches, to 6 positions on the woRkologie example, from 1 to 3 inches, to 7 settings on the Skil example.
Upkeep follows the same split. The Litheli example collects clippings in an 8-gallon bag, while the woRkologie and Skil examples offer 2-in-1 bagging or mulching. Battery mowers need charging and battery care, not fuel and engine care. Clear debris before mowing, and wear eye and hearing protection when running a mower.
The examples
Acreage and terrain fit
Skil 40V 20-Inch
Litheli 13-Inch
woRkologie 16-Inch
Matching It to Your Property
- For wider cutting paths, the Skil example lists a 20-inch deck, while the Litheli example lists a 13-inch deck and the woRkologie example lists a 16-inch deck.
- For longer stated runtimes, the woRkologie example lists 40 minutes and the Litheli example lists 30 minutes, while the Skil listing states no runtime in minutes.
- For storage, all three examples list a folding handle, and the Skil example adds a telescoping handle for vertical storage.
- For height control, the Skil example lists 7 settings, the woRkologie example lists 6 positions and the Litheli example lists 5 positions.
- For bagging or mulching, the woRkologie and Skil examples offer 2-in-1 bagging or mulching, while the Litheli example lists an 8-gallon bag.
The Acre Score explained
The Acre Score weighs performance, build quality, value, safety and warranty. A factor the listing does not state scores zero, which is why the woRkologie example scores zero for safety and warranty, while the Skil example scores for its stated IPX4 weather resistance and the Litheli example scores for its stated warranty term.
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Skil 40V 20-Inch | 9.6 | 30 | 21 | 21 | 7 | 0 |
| Litheli 13-Inch | 9.5 | 28 | 20 | 20 | 0 | 3 |
| woRkologie 16-Inch | 9.4 | 29 | 20 | 20 | 0 | 0 |
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.
For more mower options in this category, see the walk-behind-and-robotic category page.
Walk the area first and clear stones, sticks, wire and toys. Wear eye and hearing protection, long pants and sturdy closed footwear, mow across slopes with a walk-behind (not up and down), and never pull a running mower toward you. Keep kids and pets well away. Refuel only with the engine off and cool. See CPSC lawn mower safety. Read our Safety Disclaimer.
FAQ: mowing large lots
Does a 40v mower cut wider than a 20v mower?
Not as a rule. In this comparison, the Skil 40v example lists a 20-inch deck, while the Litheli 20v example lists a 13-inch deck and the woRkologie 20v example lists a 16-inch deck. Those figures belong to the example models, so they do not prove that every 40v mower cuts wider than every 20v mower.
Does higher voltage mean longer runtime?
Not on the figures stated here. The Litheli 20v example states 30 minutes and the woRkologie 20v example states 40 minutes, while the Skil 40v listing states no runtime in minutes. Battery size also differs across the examples, so voltage alone does not rank runtime.
Can a 20v battery run a 40v mower?
The woRkologie and Litheli listings state compatibility only within their own families. The woRkologie batteries fit DeWalt 20V tools, and the Litheli batteries fit Litheli products. Neither listing states cross-voltage use, so check the battery platform stated for the exact mower before buying.
What upkeep does a battery mower need?
Battery mowers need charging and battery care, plus blade and height care as parts wear. Clear debris before mowing, wear eye and hearing protection, and keep people and pets clear of the cutting area while the mower runs.
Which mower is the lightest?
Only the woRkologie listing states a weight in its bullets, at 28 pounds. The Litheli and Skil listings do not state a weight, so this comparison does not rank the three on weight.
