
Description
This Kobalt 40 volt Max brushless motor lawn mower provides superior performance without the noise, mess, and fumes of traditional gas powered mowers. This 40 V mower offers versatility with 3 cutting modes along convenient push-button start. Offering up to 40 minutes of cut time, this 40 V mower won't let you down. The included battery and charger are compatible with all Kobalt 40 volt Max tools and are backed by a 5-year limited warranty on the tool and a 3-year limited warranty on the battery and charger. Battery and charger included.
- 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 and 3 year limited battery warranty
- Compatible with the Kobalt 40V Family of 45+ Outdoor Tools

Ecological Attributes
Using an electric tool generates significantly fewer greenhouse gases (GHGs) and air pollutants than a conventional model using gasoline.
Product specifications
Adjustment Type
Single-lever
Assembled Weight (kg)
25.524072 Kilograms
Assembled Weight(lbs.)
56.27 lbs.
Bagger Included
Yes
Base Warranty Labor(Months)
60 Months
Base Warranty Parts(Months)
60 Months
Battery Amp Hours
6.0
Battery Included
Yes
Battery Type
Lithium ion
Battery Voltage
40-volt
Blade Stop System
No
Brushless
Yes
Charge Time(hrs)
1 Hours
Charger Included
Yes
Cut Height Adjustment
3-position
Cut Width(cm)
50.8 Centimeters
Cut Width (in)
20 Inches
Cut Width(mm)
508.0 Millimeters
Cutting Range/yard Size (acres)
1/4 acre to 1/2 acre
Discharge Location
Rear
Drive Type
Push
File/Certification Number
N/A
Front Wheel Size
7
Fuel Type
Cordless electric
Handle Adjustments
6
Maximum Cutting Height(cm)
10.16 Centimeters
Maximum Cutting Height (in)
4 Inches
Maximum Cutting Height(mm)
101.6 Millimeters
Minimum Cutting Height(cm)
3.175 Centimeters
Minimum Cutting Height (in)
1.25 Inches
Minimum Cutting Height(mm)
31.75 Millimeters
Model Description
40V 20in Push Lawnmower Kit
Mower Deck Width(cm)
50.8 Centimeters
Mower Deck Width (in)
20 Inches
Mower Deck Width(mm)
508.0 Millimeters
Mulching Capable
Yes
Number Of Batteries Included
1 NA
Package Weight(kg)
30.749544 Kilograms
Package Weight(lbs.)
67.79 lbs.
Rear Wheel Size
9
Recommended For Terrain Type
Flat with obstacles
Refurbished
No
Removable Battery
Yes
Safety Listing
cUL safety listing
Series Name
Gen4
Start Type
Push button start
Type
Push
Vertical Storage
Yes
Warranty
5-year limited
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Kobalt 40 V Cordless Brushless Motor Lawn Mower - 20-in is rated
out of
5 by
128.
Rated 5 out of
5
by
Blueox from
Time For A Change
My push gas lawnmower conked last fall, so a new mower was in my future. As always, I still wanted a push mower and started checking out the usual gas powered models. However, when a neighbor started up their noisy mower this spring, I thought that maybe a quieter electric version would do the job for me for a change this year. This Kobalt comes with the battery and charger. It has a steel deck. It has a mulching option which I require. The 6-position height adjustment is so easy. Speaking of easy, how's push button start sound? And no gas nor oil required!
Date published: 2022-05-26
Rated 5 out of
5
by
A Reluctant Boomer from
Delightfully surprised
I was not expecting it to be so easy to put together, easy to use, nor that it would cut so well, or that the battery would last long enough for me to do the entire grass area around my house. I confess to being a boomer who is resistant to all these new 'devices'. This one has made me reconsider everything I thought I knew! Would not hesitate to recommend.
Date published: 2022-03-29
Rated 5 out of
5
by
Robo from
The battery seems to last longer than expected.
This is my first battery powered mower, and I couldn’t be more pleased. I just moved into a new house May31st, and the grass hadn’t been mowed yet this spring. I was able to easily adjust the cutting height to the highest setting - to avoid damaging the tall grass - and the mower sailed through the workout. I used it for about 45 minutes, and the battery power indicator had only lost one of the three stars! I used it again a few days later with a closer cut - and it still shows two lit power indicators! The mower slowed a bit when going through thicker grass, but I just slowed down a bit and it was fine. All in all, a great experience. Highly recommend this mower.
Date published: 2022-06-11
Rated 5 out of
5
by
Tee H from
Great mower! I absolutely love it!
This mower is so convenient and easy to use! It is ight weight which works wonders for me being a female. I have to cut my grass twice a week so the grass doesn't get to high. So being it is light weight to push, I'm not exhausted after cutting. I have a big yard so its a plus that the battery time is as stated. It does great going up the slight hill of my ditch. It was simple to put together. My only regret is not buying this sooner!
Date published: 2022-04-08
Rated 5 out of
5
by
Joseph from
Great lawn mower
Lawn mower has great power with the 6 ah battery did whole front and side yard and battery was still full so would work perfectly with edger and blower on same battery i strongly recommend. Extremely quiet with great power
Date published: 2022-02-11
Rated 4 out of
5
by
Kwhite from
I put it to the test
If this mower can handle what we just went through, it can handle anything. My back yard was grown up pretty bad and we had a week of rain delaying the mowing. I was skeptical of a battery powered mower. It's honestly great. It did die multiple times just because the grass was so high. But guess what, you just push the button and it starts right back up. I love how you can adjust the height easily and putting the bag on is really simple. I bought it so I could mow around the pool without worrying about the grass flying around. The only reason I didn't give it 5 stars is that the side discharge is plastic and it comes off really easily. It's easy to put it back on but it can be annoying. Really happy with this purchase.
Date published: 2022-05-10
Rated 5 out of
5
by
Aaron from
After a decent amount of research I decided to choose this mower. I like that it has a steel deck (I feel that a plastic deck wouldn’t hold up as long). Right out of the box it comes ready all you have to do is unfold it. I was able to mow all of my lawn and still had two bars of battery left (my yard is a probably a little less than a 1/4 acre) and had no issues. It has enough power to get the job done and is pretty quiet
Date published: 2022-03-18
Rated 5 out of
5
by
zach from
Wife loves it
We got it to help keep the gas cost down just doing a quarter of are mowing with this helps keeping more gas in the ride mower less fuel getting pumped in it. sofar ok never had one before but my wife can push it with eas to help me and still hear the kids when thier playing around the yard.
Date published: 2022-03-11