Greenworks STBA40B421 Battery Powered Push Lawn Mower (16-Inch, 40V, Blower and Trimmer Combo Kit)

Name: Greenworks STBA40B421 Battery Powered Push Lawn Mower (16-Inch, 40V, Blower and Trimmer Combo Kit)
Brand: Greenworks
SKU: STBA40B421

By Winnowl Research Group | Updated May 2026

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Greenworks | Battery Powered Push Lawn Mowers

MEDIOCRE

Winnowl Index

Winnowl Verdict

We just finished the audit on the Greenworks STBA40B421 Battery Powered Push Lawn Mower and it landed a MEDIOCRE (66) Winnowl Index, which is a score that unfortunately reflects more "brand" than "benefit" when you compare the high price to the average specs. This one hits the Average Performance and Weak Value marks, but because it's from a brand with Strong Brand Strength, you have to decide if the reputation is worth the extra cost. With the Greenworks STBA40B421 Battery Powered Push Lawn Mower (16-Inch, 40V, Blower and Trimmer Combo Kit), you'll likely notice you should be able to easily adjust the deck to a healthy height for most common residential turf types since the Cutting Height Adjustment is only 5 settings—that's actually 21% below what we usually see from the competition. You might want to do a hard pivot from this Brand Tax product because the 56% higher price tag results in 33% less hardware for your dollar than the class average—there are definitely better ways to spend your money.

Market Value Index

Weak

$409.99

Overpriced Fair High Value

At $409.99, you are capturing 33% less Performance per dollar than the $262.51 average, confirming its Weak Value status.

Performance Rating

Average

Strengths

Neutrals

Weaknesses

In its class, this product's performance is 5% above the average and earns an Average Performance rating. It’s a bit of a mixed bag: the Total Run Time indicates you should be able to manage a typical quarter-acre property on a single charge if the grass is dry and maintained, but you may find that the 5 settings Cutting Height Adjustment means that you should be able to easily adjust the deck to a healthy height for most common residential turf types—so just make sure that's a trade-off you're okay with.

Brand Strength

Strong

Trust

Reliability

Customer Service

Data for Greenworks confirms Strong Brand Strength; while the Average Brand Trust and Average Brand Reliability are top-tier, make sure the Performance and Value meets your needs.

Available At

$409.99 View Deal

The Winnowl Lab Report

Specification	Value	Rating	Vs. Average	Winnowl Insight
Total Run Time	45 minutes	Average	9% better	Standard duty cycle. This endurance level matches the average residential mowing session for most homeowners.
Number of Batteries	2 count	Strong	38% better	Dual-battery advantage. Provides a critical safety net and allows for continuous work on larger residential properties.
Cutting Height Adjustment	5 settings	Average	12% worse	Standard precision. Offers enough variety to handle the transition from spring growth to summer dormancy.
Charging Time	120 mins	Average	2% worse	Slow-recovery charging. Common in value-tier bundles where the charger lacks active cooling or high-amperage circuitry.
Warranty	3 Years	Average	2% better	Standard industry protection. This coverage aligns with the market average and offers a fair level of consumer security.
Cutting Width	16 inches	Average	3% worse
Battery Capacity	4 Ah	Average	4% worse
Battery Voltage	40 V	Average	2% better	Standard residential output. This range represents the industry sweet spot for balancing battery weight with reliable cutting torque.

Ranking Factors

Insights

Value Rank: #40 out of 45.
Performance Rank: #33 out of 45.
Winnowl Quadrant: High Value

Strengths

Including batteries puts this in the Top 10% for out-of-the-box runtime.

Neutral

A Battery Voltage of V is about average (39.08 V) but below the highest in class at 80 V.
A Battery Capacity of Ah is about average 4.17 Ah but below the class max of 6 Ah.
A Cutting Width of inches is about average (16.57 inches) but narrower than the widest in class at 21 inches.
A Warranty of Years is about average 2.95 Years but below best in class at 5 Years.
A Total Run Time of minutes is about average (41.30 minutes) but not as long as the class max of 70 minutes.
A Cutting Height Adjustment of settings is about average (5.68 settings) but not as many as the class max of 10 settings.
A Charging Time of mins is about average 117.19 mins but below the fastest at 30mins.

Comparison

Name	Winnowl Index	Value	Performance	Brand	Price	Total Run Time	Battery Voltage	Battery Capacity	Cutting Width	Warranty	Charging Time	Number of Batteries	Cutting Height Adjustment
Greenworks STBA40B421 Battery Powered Push Lawn Mower	MEDIOCRE 66	Weak	Average	Strong	$409.99	45 minutes	40 V	4 Ah	16 inches	3 Years	120 mins	2 count	5 settings
Kobalt Gen4 40-volt, 20-in Push Lawn Mower	STRONG 86	Fair	Strong	Exceptional	$0.00	60 minutes	40 V	6 Ah	20 inches	5 Years	180 mins	1 count	6 settings
PowerSmart 80V MAX 21in. Cordless Push Lawn Mower	STRONG 80	Mediocre	Strong	Average	$399.99	60 minutes	80 V	6 Ah	21 inches	4 Years	75 mins	1 count	7 settings
LiTHELi Electric Lawn Mower	AVERAGE 71	Exceptional	Average	Average	$119.99	30 minutes	40 V	4 Ah	17 inches	3 Years	120 mins	2 count	6 settings