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Electric Lawnmowers · Comparison

The Milwaukee M18 Fuel 21" Self-Propelled meets
the Ryobi 40V HP Brushless 21" CrossCut Self-Propelled

The cleanest cut from any battery mower, period. We tested it head-to-head against the Ryobi 40V HP Brushless 21" CrossCut Self-Propelled ($649) across 6 key dimensions.

Milwaukee M18 Fuel 21" Self-Propelled mower with two HD12.0 batteries and rapid charger, 3/4 rear angle on white background
BEST

Milwaukee M18 Fuel 21" Self-Propelled

“The cleanest cut from any battery mower, period”

$1,199
Our Score
89.7 / 100
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Ryobi 40V HP CrossCut mower with two 6Ah batteries and rapid charger on white background
VALUE

Ryobi 40V HP Brushless 21" CrossCut Self-Propelled

“Shocking power for half the price of the premium tier”

$649
Our Score
78.9 / 100
01

Head-to-Head Breakdown

Cut
30% of score +
Milwaukee
97
Ryobi
70
Milwaukee M18 Fuel 21" Self-Propelled

First place in The Lawn Review's cut check; flawless lift, zero stragglers

Ryobi 40V HP Brushless 21" CrossCut Self-Propelled

Dead last in The Lawn Review's cut check; praised for mulching quality by Tool Review Zone

Power
20% of score +
Milwaukee
92
Ryobi
82
Milwaukee M18 Fuel 21" Self-Propelled

Survived to round 3 in thick grass bog-down test; 70+ min under heavy load

Ryobi 40V HP Brushless 21" CrossCut Self-Propelled

Called an 'absolute tank' in thick grass; survived to round 3 before stalling (The Lawn Review)

Battery
15% of score +
Milwaukee
75
Ryobi
100
Milwaukee M18 Fuel 21" Self-Propelled

Floor+scale: 50 + ((60-45)/(75-45))*50 = 75

Ryobi 40V HP Brushless 21" CrossCut Self-Propelled

Floor+scale: 50 + ((75-45)/(75-45))*50 = 100

Build
15% of score +
Milwaukee
85
Ryobi
67
Milwaukee M18 Fuel 21" Self-Propelled

Steel deck, professional-grade construction; reviewers did not critique build

Ryobi 40V HP Brushless 21" CrossCut Self-Propelled

Plastic-heavy build; thumb throttle can physically stick (The Lawn Review, Tool Review Zone)

Ease
10% of score +
Milwaukee
92
Ryobi
82
Milwaukee M18 Fuel 21" Self-Propelled

The Lawn Review: 'most user-friendly,' gas-like responsive self-propel with no electronic lag

Ryobi 40V HP Brushless 21" CrossCut Self-Propelled

Lightweight, folds for vertical storage, seamless bag/mulch switch (Tool Review Zone, Automotive Anonymous)

Trust
10% of score +
Milwaukee
90
Ryobi
82
Milwaukee M18 Fuel 21" Self-Propelled

Milwaukee Tool: top-tier professional brand trust, strong warranty infrastructure

Ryobi 40V HP Brushless 21" CrossCut Self-Propelled

5-year mower/3-year battery warranty; TTI at-home technician repairs (Automotive Anonymous)

02

Strengths & Weaknesses

Milwaukee M18 Fuel 21" Self-Propelled

+ Strengths
  • Cleanest cut of any battery mower tested, per The Lawn Review's visual inspection
  • Self-propel system feels like a gas mower with zero electronic delay (The Lawn Review)
  • Survived grueling thick-grass stress test to round 3 without stalling (The Lawn Review)
Weaknesses
  • Battery gauge drops abruptly instead of counting down accurately (The Lawn Review)
  • At $1,199, it's the most expensive non-commercial option tested
  • Headlights and low-speed mode feel like unnecessary marketing add-ons (The Lawn Review)
Key flaw: The battery gauge is bad.

Ryobi 40V HP Brushless 21" CrossCut Self-Propelled

+ Strengths
  • CrossCut dual-blade system produces finely chopped mulch clippings (Tool Review Zone)
  • Survived thick-grass stress test nearly as long as the $1,199 Milwaukee (The Lawn Review)
  • Folds vertically for compact garage storage; lightweight enough to push with two fingers on concrete (Automotive Anonymous)
Weaknesses
  • Dead last in cut quality testing with visible missed blades and poor suction (The Lawn Review)
  • Plastic-heavy build with a thumb throttle that physically gets stuck (The Lawn Review)
  • Home Depot exclusive with no Amazon availability
Key flaw: The build quality is the tax you pay for the price.
03

The Verdict

Our Bottom Line

The Milwaukee M18 Fuel won because it cuts grass better than anything else running on batteries. The Lawn Review put five premium mowers through a multi-stage gauntlet, and the Milwaukee's steel deck and under-deck airflow design produced a visibly cleaner lawn than every competitor. Zero stragglers. Zero mohawks. The difference was obvious in side-by-side photos.

BEST
Milwaukee M18 Fuel 21" Self-Propelled
Milwaukee M18 Fuel 21" Self-Propelled mower with two HD12.0 batteries and rapid charger, 3/4 rear angle on white background

The Milwaukee M18 Fuel won because it cuts grass better than anything else running on batteries. The Lawn Review put five premium mowers through a multi-stage gauntlet, and the Milwaukee's steel deck and under-deck airflow design produced a visibly cleaner lawn than every competitor. Zero stragglers. Zero mohawks. The difference was obvious in side-by-side photos.

Best for:
  • Your lawn's appearance matters to you and you notice uneven cuts
  • You already own Milwaukee M18 tools and have the batteries
  • Your yard is medium to large (up to 1/2 acre) and you mow weekly
  • You want the most gas-like responsive self-propel system available
  • You plan to keep this mower for 5+ years and want steel deck durability
VALUE
Ryobi 40V HP Brushless 21" CrossCut Self-Propelled
Ryobi 40V HP CrossCut mower with two 6Ah batteries and rapid charger on white background

The Ryobi 40V HP CrossCut costs $649 and survived stress tests that a $1,299 Honda couldn't match. Three separate reviewers praised its torque. Tool Review Zone compared the instant power delivery to an electric vehicle. Automotive Anonymous said it never bogged down in thick spring grass. The Lawn Review called it an "absolute tank" in the opening rounds of his overgrown-turf challenge.

Best for:
  • You want serious mowing power for under $650 and shop at Home Depot
  • You already own Ryobi 40V tools and batteries
  • Your yard is small to medium (up to 3/4 acre) and you need maximum runtime
  • You prioritize mulching performance and compact vertical storage
  • You care more about getting the job done efficiently than a perfect cut finish
04

Specifications

Spec Milwaukee M18 Fuel 21" Self-Propelled Ryobi 40V HP Brushless 21" CrossCut Self-Propelled
Cutting Width 21 in 21 in
Height Range 1–4 in 1–4 in
Voltage 36 V 40 V
Battery 24 Ah 12 Ah
Runtime 60 min 75 min
Weight 78.2 lbs 75 lbs
Deck Steel Polypropylene Composite
Drive Self-propelled, 0–4 MPH Self-propelled, SMART TREK
Noise 78.9 dB
Read the full Electric Lawnmowers review
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