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Availability:
Only 4 left in stock, order soon!
Arrives
Wednesday, Oct 1
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Size: 40V 20" (4.0Ah + 2.0Ah)
Features
- CORDLESS 20 LAWN MOWER Get more done, faster, with Greenworks electric lawn mowers. This 40V push mower provides the power you need with up to 45 minutes of run-time on a fully charged 4.0Ah and 2.0Ah battery.Brushless motor : No.No load speed : 6000 RPM
- LIGHTWEIGHT, EASY TO USE a lightweight 20 cutting deck allows for easy maneuvering through small to medium yards (up to 12 acre) more efficiently
- TWIN BLADES - offer better cut quality, superior mulching, and bagging capabilities
- AUTO SWITCH / SMART CUT TECHNOLOGY dual battery ports with auto switch allows for uninterrupted mowing. Smart cut technology adjusts for power or runtime based on the thickness of your grass
- MAINTENANCE FREE This walk behind lawn mower is virtually maintenance free, with no gas, no oil, and no emissions. It starts instantly and is quiet, but delivers gas-like power for your toughest projects
Description
Our Greenworks 40V Dual Blade/Dual Battery Port Mower is perfect for yards up to 1/3 acre with a total battery run-time of approximate 70 minutes. The G-Max 40V is a dual blade mower designed to deliver better mulching, cutting and bagging. The Dual Battery Port automatically switches to the backup battery for a longer run-time, making it easier to get the job done. All this without the hassle of gas, cords or maintenance. One-Battery fits all of our 40 Volt system that includes over 40+ tools to choose from (tools not included). Deck Material: Plastic, Deck Type: Stamped.
Brand: Greenworks
Power Source: Battery Powered
Material: Plastic
Color: 7Pin to 7Way 4Way Adapter
Style: Mower
Item Weight: 42.5 Pounds
Cutting Width: 20 Inches
Operation Mode: Battery
Product Dimensions: 29.2"D x 20.66"W x 19.5"H
UPC:
Brand: Greenworks
Power Source: Battery Powered
Material: Plastic
Color: 7Pin to 7Way 4Way Adapter
Style: Mower
Item Weight: 42.5 Pounds
Cutting Width: 20 Inches
Operation Mode: Battery
Product Dimensions: 29.2"D x 20.66"W x 19.5"H
UPC: 841821010003
Global Trade Identification Number: 03
Manufacturer: Greenworks
Item Weight: 42.5 pounds
Item model number: 25302
Batteries: 2 Lithium Ion batteries required. (included)
Is Discontinued By Manufacturer: No
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Oct 1
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 40V 20" (4.0Ah) + LED Lights
Only used it for 1 time only so far and it is a good machine. I used an older version of 40v mower by greenworks as well. It finally broke down after 7 years of abuse. I wanted to utilize the batteries from it so I pull the trigger to this newer model of 40v. I found the new one is quieter and run smoother than the old machine. Also the trimming performance is better than the old one, and it comes with the turbo function to suck left and stuff which I haven’t tried yet. Another thing I found better is the push. I feel it’s lighter and easier to push . Could be the matter of the way the wheels it attached and also the wheel size.
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Reviewed in the United States on September 12, 2025 by Donald AY
Size: 40V 20" (4.0Ah + 2.0Ah)
This is a great machine! When I ordered it I wanted an alternative to a gas mower. I don't really understand small engines, I do understand electronics. I would have a much better time fixing this mower should anything go wrong. When I tell people I've bought a battery powered mower I get some skeptical looks, and a lot of the old guys I work with doubt that it can do the job. Honestly, this is great! I have used the mower about a dozen times now since I bought it, and so far it's working amazingly. When I first bought it I was so excited to use it, but I had to let the batteries charge first (bummer!), they do come with about a half charge, but I didn't want to leave my lawn half finished or anything since I wasn't sure how long exactly the batteries would last. After mowing for the first time, I did only my front yard on the first and my back yard the next. I didn't split my yards due to battery longevity, but because I still wasn't sure what they could do without dying, and I didn't want a half finished back yard. The first thing I noticed when mowing the first time was how quiet it is! It's a bit quieter than a vacuum cleaner. Next I noticed how light weight it is, after mowing our front yard I wasn't tired, and I was barely sweaty at all, it just wasn't a lot of work. The next time I mowed I decided to throw caution to the wind and mow both yards on a single go. I made sure the 4Ah battery and the smaller 2Ah battery were charged up and went to work. I was able to finish both yards with about a half charge left on the 2Ah battery, pretty impressive to me. When bagging I did notice the bag was a little on the small side, I had to empty it fairly often, but nothing that made me consider this being a bad investment or regret using the bag. The mulcher works well too, I was able to mulch my front yard (fairly thick grass) with only a couple small clumps left behind, which I consider to pretty good. The only con I have: the mower is great and cuts well, but it can (and does) leave a strip of un-mowed grass on some of the rows, so you will find yourself overlapping some of the rows to get that strip taken care of. Not bad, but it does add just that much more to your mowing time. All in all this is a great mower, and I will be buying more GreenWorks tools in the future (I bought the trimmer already!). Edit: 5 year update I have had the mower for five years now. I haven't used it yet this year (2019) as it's still winter, but I don't suspect that I'll have any issues come spring. This mower has served me well for the last five years and, with proper care, I suspect I can probably get another 5 out of it. The batteries don't seem to have degraded at all, or at least not a noticeable amount, and other than blades the mower hasn't needed any maintaining.
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Reviewed in the United States on June 3, 2014 by RFM
Size: 40V 20" (4.0Ah + 2.0Ah)
I bought this mower on sale for $280 and feel like that is a good price. I would not think I would have payed $400. It includes 2 batteries which are VERY expensive to replace which should be something to be aware of. I live on .25 acre lot and about half of that is grass (in other words I have trees, shrubs, house, drive, garden, etc) so I mow about an eight of an acre of grass. I have Bermuda (summer, won't get as tall and is not as thick as say a course fescue) so this mower is just about ideal size for this yard. As long as you don't hurry (I'm 57 with a bad knee....I don't hurry cause I can't), the cut is great, very clean as you should expect from a new mower with sharp blades. The bagger and the mulcher both seem to work very well on my first use. I don't let my grass get too long generally so that is obvious a factor in the mulching feature. I use to use a corded electric and I can say I do NOT miss dragging a cord around my yard. Having said that, I bought my black and decker used off craigslist 10 years ago for $40 and it is still running. I have no expectation of the batteries lasting 10 years. So, in terms of long term cost, this can't compare (nor is it fair to compare...if long term cost is your biggest concern DON'T BUY ANY BATTERY model...get corded). But again, over the years I have planted more small trees and shrubs so the cord is more and more a factor. I see that there are complaints about a "mow-hawk" (pun intended), but, with my grass, I have not see anything like that so I would assume there was a design fault that is fixed (2020). I Don't know...might be the kind of grass or thickness? I would check those reviews closely if you have thick cool season grass. The 4 amp battery on it's own is not enough to mow my whole lawn so I would assume if you have more than a quarter acre it might take more than the 4/2 amp batteries to complete. If you don't mind doing the front in the morning and waiting to do the back, it's going to be fine. The charging time is very quick compared to some old trimmers I have had. It is worth noting that when the 2 amp battery was drained I came in to put it on the charger and it would not charge. This was very concerning at first, however, I assume the issue was that it had to cool down as an hour later it seems to be charging just fine. The 4 amp battery did not seem (at first test) to have this issue. Just something to keep in mind...it might only take an hour to charge the small battery but you have to wait for it to cool down to start the hour! The larger battery seems to take about 2 hours to charge (no surprise). This mower is even more quiet than my electric corded black and decker, so, if noise is a problem, this is about as quite as I could imagine other than a sheep to cut your grass. I am not at all sure about the "20 inch" width of mow as my old 18inch mower seems to have had a slightly wider cut. Not a huge problem, just an observation. I would say that unless you have a tiny yard, you would suggest you do not want to get a smaller sized mower. There is a layer of cushioning (that will probably degrade and fall of in a year or 2, but a good idea) that makes a nice little touch "comfort feature to this mower. The mower is pretty light considering there are 2 blades and 2 batteries so this mower is about as light as I can imagine a mower being. If you need a self propelled model of this mower you are probably too frail to mow grass at all. Make a local kid's summer and hire a teenager to do it :-). I was aware that this mower has 2 10inch blades (and I assume 2 motors?) so this complaint is a bit disingenuous, however, this HAS TO add to the complexity of the mower (more parts, more things to go wrong) so that is a concern for long term reliability. there is a 2 year warranty, however, if it takes them weeks to resolve issues (as other reviews suggest) then you will need to have a good relationship with your neighbor to borrow while issues get resolved. So, the complexity is a concern and it has a narrower cut than I hoped/expected/is advertised, but, all other things in consideration, this is a great mower for smaller than a third acre yard. I have only used it twice so I will try to come back and review the batteries life etc.
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Reviewed in the United States on June 13, 2020 by Former Pilot