Kobalt Gen4 40-volt, 20-in Push Battery Walk Mower with (Battery and Charger Not Included)

Name: Kobalt Gen4 40-volt, 20-in Push Battery Walk Mower with (Battery and Charger Not Included)
Brand: Kobalt
SKU: 5005347707
Rating: 3.7 (78 reviews)

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3.7

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The Kobalt 40-Volt Max Brushless Motor Lawn Mower provides superior performance without the noise, mess, and fumes of gas. The 40V mower offers versatility with 3-1 cutting modes along convenient push button start. Offering up to 40-minutes of cut time, the 40V mower has you covered. Kobalt 40-volt max tools are backed by a 5-year limited warranty on the tool. "battery & charger sold separately"

Brushless motor offers increased power, longer run time and prolonged motor life
20-in steel deck offers long lasting durability
3-in-1 mulching/bagging/side discharge offers versatility for any mowing style
Telescopic folding handle allows for convenient vertical storage
Single-lever 6-position deck height adjustment to quickly adjust for your preferred grass height
Push button start for easy operation
5 Year limited tool warranty
Compatible with the Kobalt 40V Family of 45+ Outdoor Tools

General
Battery Voltage	40-volt	Battery Type	Lithium ion
Series Name	Gen4	Start Type	Push button start
Type	Push lawn mower	Deck Material	Plastic
Power Source	Battery	Adjustment Type	Single-lever

Dimensions
Cut Height Adjustment	6-position	Mower Deck Width (Inches)	20
Cut Width (Inches)	19.5	Package Weight (lbs.)	58.42
Front Wheel Size	7-in	Rear Wheel Size	9-in
Maximum Cutting Height (Inches)	4	Weight (lbs.)	56.27
Minimum Cutting Height (Inches)	1.25

Features
Bagger Included	Yes	Handle Adjustments	6
Battery Included	No	Lowe's Exclusive	Yes
Blade Stop System	No	Mulching Capable	Yes (included)
Brushless	Yes	Number of Batteries Included	0
Charge Time (Hours)	3.6	Removable Battery	Yes
Charger Included	No	Self-Propelled	No
Collapsible	Yes	Vertical Storage	Yes
Discharge Location	Rear	Battery 1 Amp-Hours	0

Warranty
Warranty	5-year limited

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -	Safety Listing	cULus safety listing

Compatibility
Recommended Yard Size	Up to 1/4 acre	Replacement Blade OEM Part Number	KMBA 1040-03
Recommended Terrain Type	Flat with obstacles

Miscellaneous
UNSPSC	27112000

Check out the Best Selling Cordless Electric Push Lawn Mowers on Lowes.com

Review

3.7 out of 5

78 Reviews

61% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Many customers praise the mower's quiet operation, lightweight design, and ease of use compared to gas alternatives, with strong approval for self-propelled function and low maintenance. However, a significant portion express frustration over battery incompatibility with older models, discontinued spare parts, and poor customer service responsiveness. Some report battery failures and difficulty obtaining support without exact model numbers. A few mention concerns about plastic durability or battery capacity limitations. Despite performance strengths, many customers express regret after encountering long-term support barriers, though others find the quiet, lightweight design worthwhile for small to medium yards.

Customer review summary generated by AI, including incentivized reviews.

78 Customer Reviews

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Kobalt Mower Doesn't Last

Would Not Recommend

I took care of this mower, but here we are. Cannot handle thick grass, and needs 2 batteries to cut really anything at all. Of course new models don't use the same batteries, so $500 down the drain for a mower and 2 batteries than lasted less than 3 years. I wouldn't buy a Kobalt mower again.

AlexApril 23, 2026

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Response from Kobalt Team

Hello Alex, we appreciate you taking the time to reviewing the Kobalt 20" Lawn Mower. All 40v Kobalt batteries are compatible with all Kobalt 40v...

Kobalt TeamApril 23, 2026

Chervon-Kobalt

Battery died quick

Would Not Recommend

only cuts for a few minutes before it starts dying. Grass doesn't shoot into bagger

BJune 20, 2025
From Gen4 40-volt, 20-in Self Propelled Battery Walk Mower with (Battery and Charger Not Included)

Was this Review Helpful ?

Response from Kobalt Team

Hello there,
Thank you for reviewing the Kobalt Mower. The runtime will be dependent on cutting conditions and settings. For optimal runtime per...

Kobalt TeamJune 20, 2025

Chervon-Kobalt

Quality product that will amaze at how well it mow

Would Recommend

This is an upgraded version of my first 40v. So many improvements that make it perfect for me. Was able to use my old charger and batteries which saved me a bunch of money.

DynoDonMay 24, 2025
From Gen4 40-volt, 20-in Self Propelled Battery Walk Mower with (Battery and Charger Not Included) Verified Purchaser

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Just received

Would Not Recommend

Not worth the money revs too high and wheels and blade are run by same motor. Not sure if the manual would be any better...two thumbs down

UnhappyMay 17, 2025
From Gen4 40-volt, 20-in Self Propelled Battery Walk Mower with (Battery and Charger Not Included) Verified Purchaser

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Response from Kobalt Team

Hello there,
We thank you for reviewing the Kobalt Mower. The self propel function operates on a separate motor than the blade. We thank you for...

Kobalt TeamMay 18, 2025

Chervon-Kobalt

I would recommend to others.

Would Recommend

Very happy with the product. Delivery was earlier than expected.

D and DApril 29, 2025
From Gen4 40-volt, 20-in Self Propelled Battery Walk Mower with (Battery and Charger Not Included) Verified Purchaser

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Great product

Would Recommend

First electric mower to ever purchase and I definitely went into the purchase thinking it wasn’t going to perform as well as it did on my first use with it. It was well worth the purchase.

Sam AApril 29, 2025
From Gen4 40-volt, 20-in Self Propelled Battery Walk Mower with (Battery and Charger Not Included) Verified Purchaser

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Quiet

Would Recommend

Convenience - no gas or oil to mess with!

Roy JApril 21, 2025
From Gen4 40-volt, 20-in Self Propelled Battery Walk Mower with (Battery and Charger Not Included) Verified Purchaser

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Electric power mower

Would Recommend

Ease of operation and quiet operation.

BuddyApril 12, 2025
From Gen4 40-volt, 20-in Self Propelled Battery Walk Mower with (Battery and Charger Not Included) Verified Purchaser

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Does the job well

Would Recommend

EasyApril 11, 2025
Verified Purchaser

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Poor QualityControl, Wheel Broken OutOfBox

Would Not Recommend

I took it out of box , wheel is already broken in the box, Poor Quality control. I invested in the Kobal Eco system and 40V Batteries. Now return is a big process. I have to carry it to store and they don't have stock anymore. Not sure now, Its a waste of money

SivaApril 1, 2025

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https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/2b5671ad-23cf-5ea5-b3cc-4ba42cd5fdfe

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/41ff5e1c-4acb-532e-b5f9-49ab9671d902

Was this Review Helpful ?

Response from Kobalt Team

Hello there, We thank you for reviewing the Kobalt Lawn Mower and we are sorry to hear your purchase fell below expectations! We would be happy to lo...

Kobalt TeamApril 4, 2025

Chervon-Kobalt

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		Name	Current Item KobaltGen4 40-volt, 20-in Push Battery Walk Mower with (Battery and Charger Not Included)
		Ratings	78
		Type	Push lawn mower
		Battery Voltage	40-volt
		Power Source	Battery
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