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21.5 in. 20-Volt MAX Lithium-Ion Cordless Battery Walk Behind Push Mower

  • High-Efficiency Brushless Direct Drive Motor
  • Push Start for easy operation
  • 21.5 inch durable metal deck to cut large areas
  • See More Details

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Product Overview

DEWALT 2x20V MAX Brushless Direct Drive Cordless Push Mower is perfect for properties up to 1/2 acre.

DEWALT Guaranteed Tough

DEWALT 2x20V MAX Brushless Direct Drive Cordless Push Mower is perfect for properties up to 1/2 acre.

Equipped with auto sensing technology the unit increases torque in high overgrowth.

Up to 75 Minutes of Runtime

Equipped with auto sensing technology the unit increases torque in high overgrowth.

The DEWALT 20V MAX Battery System works with 200+ products.

DEWALT 20 VOLT MAX System

The DEWALT 20V MAX Battery System works with 200+ products.

Includes two 20V MAX 10.0Ah Batteries, 2 Chargers, grass collection bag, grass chute and mower safety key.

Battery & Charger Included

Includes two 20V MAX 10.0Ah Batteries, 2 Chargers, grass collection bag, grass chute and mower safety key.

6 cutting heights that range from 1.5 in. to 4.5 in. to handle any size lawn

21.5 in. Metal Deck

6 cutting heights that range from 1.5 in. to 4.5 in. to handle any size lawn

Made in the USA with global materials.

Made in the USA.

Made in the USA with global materials.

3-Year Limited Warranty, 1-Year Free Service and 90-Day Money Back Guarantee.

Product Warranty

3-Year Limited Warranty, 1-Year Free Service and 90-Day Money Back Guarantee.

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Shop all DEWALT 20V MAX Batteries

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The 2X 20-Volt MAX 3-in-1 Cordless Lawn Mower is powered by two 20-Volt MAX 10 Ah batteries to deliver 40-Volt of power and 400-Watt Hours. The unit features a 21.5 in. steel deck and a high-output brushless direct drive motor, delivering powerful performance for up to 70-minutes of runtime. Equipped with auto sensing technology the unit increases torque in high overgrowth. With 6 cutting heights that range from 1.5 in. to 4.5 in., you can handle any size lawn. The lawn mower's 3-in-1 capability allows for mulching, bagging or side clipping discharge. It is perfect for properties up to 1/2 acre.
  • Two 10 Ah 20-Volt batteries for 400-Watt hours, perfect for properties up to 1/2 acre
  • 21.5 in. steel deck for a wider cut and quick completion high-output brushless direct drive motor delivers powerful performance for up to 70-minutes of actual cutting runtime
  • Auto sensing technology allows the unit to increases torque in high overgrowth
  • No gas maintenance, pull out after a long winter and start the unit right up
  • 3-in-1 mulching, bagging and side grass discharge
  • 6 cutting heights that range from 1.5 in. to 4.5 in. to handle any size lawn



  • More Options in the DEWALT 20V/FLEXVOLT Platform Here
  • Click here for more information on Electronic Recycling Programs

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

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New This Season21.5 in. 20-Volt MAX Lithium-Ion Cordless Battery Walk Behind Push Mower
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Name13 in. ONE+ 18-Volt Lithium-Ion Cordless Battery Walk Behind Push Lawn Mower - 4.0 Ah Battery & Charger IncludedPRO 21 in. 60-Volt Battery Cordless Lawn Mower with 5.0 Ah Battery and Charger20 in. 40-Volt Brushless Lithium-Ion Cordless Battery Walk Behind Push Lawn Mower two 6.0 AhBatteries & Charger Included21.5 in. 20-Volt MAX Lithium-Ion Cordless Battery Walk Behind Push Mower
Price
Ratings
(192)
(519)
(3615)
(152)
Power TypeBatteryBatteryBatteryBattery
Size of Yard1/4 Acre or Less1/4 Acre or Less1/4 - 1/2 Acre1/4 - 1/2 Acre
FeaturesBagger,Mulching Lawn MowerAdjustable Cutting Height,Adjustable SpeedAdjustable Cutting Height,Adjustable Handlebar,Bagger,Brushless Motor,Collapsible,Foldable handle,Headlights,Mulching Lawn Mower,No Oil Change Required,Single-lever height adjustmentAdjustable Cutting Height
Engine MakeOEM BrandedOEM BrandedOEM BrandedOEM Branded
RefurbishedNoNoNoNo
Cutting Width13 inches20 inches20 inches21 inches
Voltage (v)18v60v40v20v
Battery Run Time (min.)30604870
Rear Wheel HeightLow WheelHigh WheelHigh WheelLow Wheel
Recommended TerrainFlatFlat,SlopedFlat,SlopedFlat,Sloped,Uneven
View ProductView ProductView ProductView Product
DEWALT 2x20V MAX Brushless Direct Drive Cordless Push Mower is perfect for properties up to 1/2 acre.

DEWALT Guaranteed Tough

DEWALT 2x20V MAX Brushless Direct Drive Cordless Push Mower is perfect for properties up to 1/2 acre.

Equipped with auto sensing technology the unit increases torque in high overgrowth.

Up to 75 Minutes of Runtime

Equipped with auto sensing technology the unit increases torque in high overgrowth.

The DEWALT 20V MAX Battery System works with 200+ products.

DEWALT 20 VOLT MAX System

The DEWALT 20V MAX Battery System works with 200+ products.

Includes two 20V MAX 10.0Ah Batteries, 2 Chargers, grass collection bag, grass chute and mower safety key.

Battery & Charger Included

Includes two 20V MAX 10.0Ah Batteries, 2 Chargers, grass collection bag, grass chute and mower safety key.

6 cutting heights that range from 1.5 in. to 4.5 in. to handle any size lawn

21.5 in. Metal Deck

6 cutting heights that range from 1.5 in. to 4.5 in. to handle any size lawn

Made in the USA with global materials.

Made in the USA.

Made in the USA with global materials.

3-Year Limited Warranty, 1-Year Free Service and 90-Day Money Back Guarantee.

Product Warranty

3-Year Limited Warranty, 1-Year Free Service and 90-Day Money Back Guarantee.

Shop the full line of DEWALT Cordless String Trimmers

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Shop the full line of DEWALT Cordless Blowers

Shop the full line of DEWALT Cordless Chainsaws

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Shop the full line of DEWALT Cordless Chainsaws

Shop the full line of DEWALT Cordless Hedge Trimmers

Shop Hedge Trimmers

Shop the full line of DEWALT Cordless Hedge Trimmers

Shop the full line of DEWALT Cordless Mowers

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Shop all DEWALT 20V MAX Batteries

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Specifications

Dimensions

Assembled Depth (in.)
38.81 in
Assembled Height (in.)
17.375 in
Assembled Width (in.)
23.81 in
Blade Length (in.)
21.5
Cutting Width
21 inches
Front Wheel Size (in.)
8
Mower Deck Width
21.5
Rear Wheel Size (in.)
8

Details

Amperage (amps)
0
Assembly Required
Yes
Battery Amp Hours
10 Ah
Battery Run Time (min.)
70
Battery Type
Lithium Ion
Battery/Charger
(2) 10 Ah Batteries & Charger Included
Charge Time (hours)
8
Charger Included
Charger Included
Cutting Height Options
6-position
Cutting Options
Bag,Mulch,Side-Discharge
Deck Material
15 Gauge Steel
Deck Type
Stamped
Engine Make
OEM Branded
Engine Torque (ft.-lb.)
0
Features
Adjustable Cutting Height
Included
Bagger,Charger
Lawn Mower Type
Push Mower
Maximum Cutting Height (in.)
4.5
Minimum Cutting Height (in.)
1.5
Mower Size Type
Standard
Number of Batteries Required
1
Number of Blades
1
Number of Handlebar Positions
2
Number of Total Batteries Included
2
Power Type
Battery
Product Weight (lb.)
72 lb
Rear Wheel Height
Low Wheel
Recommended Terrain
Flat,Sloped,Uneven
Refurbished
No
Returnable
90-Day
Size of Yard
1/4 - 1/2 Acre
Start Type
Push Button Start
Tools Included
Mower
Voltage (v)
20v
Walk Behind Mower Type
Manual Push

Warranty / Certifications

Certifications and Listings
UL Listed
Manufacturer Warranty
3-Year Limited Warranty 30-Day Money Back Guarantee

Questions & Answers

23Questions26Answers

What is the size of the box it comes in?

Asked by Denny May 9, 2021
1
Answer

Hi Denny, I could not find this information for you, online. I'd recommend either calling your local Home Depot or reaching out to DeWalt via their webpage forms.

A review mentioned a 15 degree limit. Would I have a problem mowing a steep side hill?

Asked by Joe May 8, 2021
3
Answers

The problem will occur when mowing across the slope at greater than 20-25 degrees. The mower could flip over causing sever injury. There is a slope gage in the owner's manual.

is the battery indicator on the mower (in front of the battery housing) supposed to light up and show the charge

Asked by TD May 4, 2021
1
Answer

TD, Nothing different from when you asked last month. The manual posted on the page here under Info and Guides isn't specifically for this mower (judging by the model number being different) and the DeWalt website lacks many of the manuals that used to be posted there. Their chat support frequently gives incorrect answers. I'd suggest you give them a call. Unfortunately, I am unable to find a manual for you that specifically states it's for this mower and that would give a definitive answer. The manual on this webpage doesn't at all mention any battery indicator besides the ones on the packs themselves.

Does the flexvokt battery work in this mower. I have a few for my circular saw. Its the 60 volt flex volt dewalt battery

Asked by John April 26, 2021
2
Answers

Hi John... The flex volt battery you talking about is a 6 amp battery. The lawnmower uses two 20 volt 10 amp/hour batteries. I always use what the manufacturer supplies and designs for their product. If theses batteries fit the lawnmower they will probably work but will not last as long as the 10 AH batteries that come with this mower. The Motor may run a little hotter trying to supply the amperage it was designed for.

Will batteries fit in my dewalt cordles drill,recipricating saw,hedge trimmer,blower

Asked by DJ April 23, 2021
2
Answers

HI to answer your question.....we have two types of equipment lawn and garden/hardware tools...there's been a lot of debate if you can use the same or interchange batteries. From my experience I would say they are not. Use only the same batteries for the type of equipment you use. Dewalt XRT use XRT batteries so on and so fourth. Switching batteries could damage the equipment and void any warranty. Hope this helps ScottE.

Is this self propelled?

Asked by Mike April 22, 2021
4
Answers

Hi Mike... This mower is not self propelled. However it is lightweight and pushes relatively easy in low grass. If you have a very high & thick lawn, you may find it difficult to push through the higher grass.

Can I use these batteries for my DeWalt drill and circular saw?

Asked by Chris April 17, 2021
2
Answers

Yes, I just checked and the lawnmower battery did fit my new drill and worked. I do not have a circular saw to test it on. The lawnmower battery is a 10 amp battery while the drill battery is 1.5 amps. Personally I would use the batteries that came with the tool or equipment that it was designed for. But yes it did work on the drill.

What is lifetime of battery?

Asked by Ron April 17, 2021
4
Answers

Not sure if you are asking how long the battery lasts on a charge or the overall lifetime of the battery. I've only had the mower for a few months so I can tell you that my mower will mow my relatively small lawn two times per charge. I do not know how long the actual useful life of the battery is.

How does it do with wet or damp grass? Does the grass get stuck around the blade?

Asked by Landshark April 9, 2021
5
Answers

It definitely does NOT work cutting wet grass if it's tall. It will shut off repeatedly and stop working. You really should wait until the grass is reasonably dry or you're in for a frustrating experience.

Can flexvolt batteries be used with this mower?

Asked by Rob April 8, 2021
2
Answers

Hi Rob, Absolutely! Any of the flexvolt 60V batteries will step down and work in this mower.

21.5 in. 20-Volt MAX Lithium-Ion Cordless Battery Walk Behind Push Mower - page 2

Customer Reviews

  • 4
    out of 154 reviews
  • 68% recommend this product
Filter by:
Showing 1-10 of 154 reviews
March 29th Purchase
Not reliable. After charging my battery for over a week. I go to cut grass today and remind my grass is not even tall grass. It continuously kept cutting off. This was first battery lawnmower and my very last one. Love Dewalt products but this was very upsetting! Below is how low my grass is and it continuously keep shutting off.
by Tiffany
4 people found this helpful
This is an excellent push mower! Comes with absolutely everything you need right in the large box...
This is an excellent push mower! Comes with absolutely everything you need right in the large box! Two batteries, two chargers (which make absolutely no noise while charging!), and of course an easy-to-assemble, electric push mower! Even the parts come in a easy open bag with a zip tie, you just know they wanted to make it so easy! Everything is packed well to protect the parts inside. Made in the USA and you can tell because it just works perfectly right out of the box after you assemble the top part of the handle. Insert two screws and two tightening knobs, place the wire in the plastic clip, and you're done. I did it all myself, but it might be easier to have someone help hold the handle in place if you need it. The manual just shows pictures in the beginning but they have assembly instructions towards the end, if you even need them. It's very easy to assemble. You can (and should) let the grass clippings stay on the lawn to provide nutrients, but there is also a mulching bag option for those who prefer/need it. There's also a plastic side shoot that you can install just under the flap if you want clippings to spray out from the right hand side of the mower as you push it along. It was best to just let the clippings fall behind the mower as it was pushed forward, which requires no extra equipment. I just let the two 10Ahr batteries charge over night (used both chargers, so both batteries where ready to go) and they easily provided all the power needed for an average size yard. Put it this way, the batteries still showed 3 full bars after a few hours of mowing, granted the batteries were brand new, and the grass was already low and easy to cut. I still feel that this mower is perfect for relatively flat lawns (there is a 15 degree slope limit), and it's very easy to push because it doesn't weigh as much as a gas mower. No gas, no oil, no problem! The lower weight also makes it easier to adjust the height. There are two adjustments (front and back) and they work opposite of each other. Only the front is numbered 1-6 on the top of each slot, but you can easily figure out the matching setting on the back wheels just by counting the slots. Adjustment was very easy, especially if you needed to change it to get the height where you want it. Starting is an absolute breeze, just insert the large plastic safety key under the handle, push the large yellow button on the handle, then pull the yellow bail handle! Starts right up! And that electric motor and blade is powerful! Make no mistake, when the going got tough, the mower sensed it and you could hear the extra power that it automatically started delivering! I have high confidence that this mower will cut right through the thicker grass too. I think the only possible thing I could be critical of is that the push handle only has two adjustment settings (high and very high), so if you're short, this may not be the best product for you. I'm 5' 10" and found the lower setting to be the better setting of the two. This is much better than having to lean down to push the mower, so it's probably best that they designed the handle to be up higher in general to allow for much better/more comfortable posture for pushing. I'm very happy with it, and so is my back! The handle does limit your turning ability in tight spaces, but every push mower is like this, so it shouldn't be a problem if you already use a push mower. Keep in mind the mower requires both batteries to work (two 20V batteries). It is best to keep the battery capacities matched because if you put a weaker battery in with a stronger battery, the mower will stop working when the weaker battery dies. It's best to use the batteries as a matched set whenever possible and since this mower comes with 2 of them already, you will already have everything you need! The batteries lock into place and are very easy to install on the top of the motor. Storing the mower is great too, the handle folds right down over the mower and locks into place with easy to use rotation knobs. Just rotate, fold, rotate again, then move to lock the metal pins in place on either side. You do the same thing when adjusting the push handle height. They even give you a handle at the front so you can wheel it where ever you need it while it's all folded up! I just don't know how they could have possibly made it any easier! If you have a gas push mower that needs replacement, this is really a no-brainer! Go electric! You just can't go wrong with Dewalt and it really shows in their lawn mowers too! Great job Dewalt, keep up the excellent work!
by FloridaGator
5 people found this helpful
This Dewalt 21.5" 20 volt (cordless) battery walk-behind mower is going to be a "back-up" to my 1...
This Dewalt 21.5" 20 volt (cordless) battery walk-behind mower is going to be a "back-up" to my 10 year old gas engine mower. The mower seems to be well-constructed, pretty easy to use and is FAIRLY lightweight (as this is NOT a self-propelled mower.) It comes with two 20 amp lithium ion batteries, as well as two chargers. By utilizing two batteries, the usage time is expanded vs. mowers that only use one battery (Dewalt says up to 70 minutes of run-time.) When moving into higher grass or leaves, the motor automatically rev's up to avoid getting bogged down. It also features 6 cutting heights (easily adjustable) and can mulch, bag clippings or side discharge with a deflector (included). I did notice that when bagging, there was a small amount of clippings discharge leaking out the top side of the bag (where it meets the back of the mower). In addition, I don't think this will be a very efficient "mulcher" as the deck does not seem to be designed for that purpose and the motor does not run fast enough for maximum mulching. I plan to use it as a "bagger.
by Midnightdriver2
4 people found this helpful
I had said I would never get an electric type lawn mower in the past. Well, times change I guess....
I had said I would never get an electric type lawn mower in the past. Well, times change I guess. This battery operated mower is pretty good overall. I has a really nice look to it for sure. The batteries seem to charge fairly quickly and seem to provide ample power for mowing of a normal lawn. However, do not attempt to use this mower on grass that has grown to high. You will just make yourself crazy. It bogs down and stops really easily if the grass is to tall or thick. I have not yet had time to figure out how long the batteries last. I am a bit concerned they may die before the lawn is finished. We shall see.
by Leonard
1 person found this helpful
The 2X 20-Volt MAX 3-in-1 Cordless Lawn Mower is powered by two 20-Volt MAX 10 Ah batteries to de...
The 2X 20-Volt MAX 3-in-1 Cordless Lawn Mower is powered by two 20-Volt MAX 10 Ah batteries to deliver 40-Volt of power and 400-Watt Hours. The unit features a 21.5 in. steel deck and a high-output brushless direct drive motor, delivering powerful performance for up to 70-minutes of runtime. Equipped with auto sensing technology the unit increases torque in high overgrowth. With 6 cutting heights that range from 1.5 in. to 4.5 in., you can handle any size lawn. The lawn mower's 3-in-1 capability allows for mulching, bagging or side clipping discharge. It is perfect for properties up to 1/2 acre.
by Steve
2 people found this helpful
This is a very well designed mower. This 21.5 in. 20-Volt MAX Lithium-Ion Cordless Battery Walk-...
This is a very well designed mower. This 21.5 in. 20-Volt MAX Lithium-Ion Cordless Battery Walk-Behind Push Mower by DEWALT has the size and power to be an effective mower for up to a half acre of property. The wide cut of 21.5 inches helps get the job done with less passes than a smaller 20” blade. You can choose from three cutting settings; mulching, bagging, or side discharge. It is very easy to adjust the cutting height, with a single lever on the front wheels and a single lever on the rear wheels, allowing for 6 different height settings. It is well designed so that it is easy to push. The handle breaks down quickly and easily for compact storage. It uses two batteries and comes with two chargers. I like and highly recommend this mower. Additionally, I do wish you could leave the batteries in place and charge with a single cord to one outlet instead of having to remove them and use two outlets. The assembly instructions are very poorly done, so unless you are familiar with assembly, could be hard to follow, especially with the basket. I also wish the collection bag was larger for less stopping and dumping.
by TileToolJim
2 people found this helpful
This Dewalt 21.5 inch battery operated mower is great for mowing small to medium lawns. Mower com...
This Dewalt 21.5 inch battery operated mower is great for mowing small to medium lawns. Mower comes with a bag to catch grass clippings or be used without the bag for mulching. The mower comes with 2 powerful 10 Amp batteries and 2 chargers. The Mower also includes a battery meter to view the remaining strength of the mowers batteries. I was able to mow about a 1000 square foot lawn and still have over 3/4 battery power remaining. The mower is equipped with some safety features to avoid accidents and prevent accidental starting. The mowers handle folds up nicely and can be stored in convenient places. This mower built by Dewalt is well built with a lot of thoughts put into it. It’s a welcome alternative to my gasoline powered mower.
by Mim
1 person found this helpful
I have been very impressed with the power of this mower - in powered through thick, overgrown, vi...
I have been very impressed with the power of this mower - in powered through thick, overgrown, vine-like weeds and I barely had to slow my walking pace. The mower ramped up the power and cut through it like a breeze. Our other battery powered mower would have shut off from overload doing this. The mower ramps up power when it needs and as soon as it is done it ramps down. It does this so quick in order to maximize efficiency. Our other mower goes for another thirty seconds before ramping down. I cannot speak to the runtime of the mower as it’s winter and I don’t have much grass to cut. But with two 10 amp hour batteries it has tons of power and I imagine it would last a while. I ran it for 20 minutes clearing weeds and trimming and it still has full battery power. I don’t use the bagger so I’m not sure about the efficiency - but the ejection port works great. It’s a bit wider than my other mower and it seems quite a bit more powerful. So far, very happy with the mower and can’t wait to use it this summer.
by KandEWoodwork
I have used several battery powered lawnmowers over the past few years and this product comes in ...
I have used several battery powered lawnmowers over the past few years and this product comes in very close to being my top choice but has a couple features missing that make it fall short Overall this mower does a great job for yards under a 1/2 acre. The two 20-volt max batteries ran well throughout my backyard (my front yard is dormant) but I did start to get a low battery indicator towards the end. The mower was very easy to put together and turned on without a hitch. The mower feels light and the 21.5 in deck feels wide. Fold up is easy and can be stored away in a compact area While I love not dealing with gas I have yet to find a mower that can efficiently cut thru thick-blade grass on a morning with dew still out. This mower unfortunately bogged down a couple times when trying to get thru thicker grass/weeds while wet. You can hear the autosense tech try to ramp up the RPMs to get through it but I think that is just an overall limitation of battery powered mowers. This could have also contributed to the quick draining of batteries. I would suggest having additional 20V batteries ready to go if you are going to do a yard closer to or over 1/2 acre. If these two batteries go out you have a 3-4 hour charge time to get back up and running The only other con I have about this mower is it is not self-propelled. With an angled lawn this is a must have feature but my guess is the smaller 20V batteries would drain much faster with this feature. This might be better suited for larger, higher voltage batteries like other manufacturers use. Overall this mower is perfect for a smaller yard that is mostly flat. Having any sort of elevation in your yard is going to lead to some sore legs. I would definitely recommend this mower to anyone that would fit that criteria. It is definitely up to par with other Dewalt products in terms of quality
by Theo
4 people found this helpful
Wow! This is my first Dewalt product and man is this mower high quality! From the batteries to th...
Wow! This is my first Dewalt product and man is this mower high quality! From the batteries to the power to even the wheel with their tread, this is a high end electic mower. It came nicely packaged and was 90% complete, just needing to charge the batteries and attach the handle. I love the fold up feature that allows you to snug it up against a wall. I am coming from a Ryobi mower which has been great but this seems to be a step above. Cuts extremely well and definitely gets that 75 minute runtime as promised. Highly recommend if you are looking for the top of the line electric mower!
by Matrix
3 people found this helpful
Showing 1-10 of 154 reviews