Greenworks 40V 21″ Brushless Cordless (Self-Propelled) Lawn Mower (75+ Compatible Tools), 5.0Ah Battery and Charger Included
$479.99
Price: $479.99
(as of Aug 16, 2025 06:41:25 UTC – Details)
The Greenworks 40V Mower features a 20″ poly deck, dual blades, 2-In-1 design, dual battery ports with automatic switchover, 5-position single handle height adjustment, push button start, 4-year tool, 2-year battery warranty.
40V 21” LAWN MOWER – Get more done, faster, with Greenworks electric lawn mowers. This 40V self-propelled lawn mower provides up to 45 minutes of run-time with fully charged 5.0Ah battery (varies based on grass condition and operator technique).Front wheels : 8 Inches
BRUSHLESS MOTOR / DURABLE STEEL DECK – This electric mower features a durable 21″ deck, and a highly efficient brushless motor that provides more torque, quiet operation, and longer life
SINGLE LEVER HEIGHT ADJUST – 7 position height adjustment provides the best cut in all environments. 3-in-1 design offers rear bag, side discharge, and mulching capabilities
SELF-PROPELLED – Rear wheel drive power increases traction to tackle the toughest backyard terrain
VERTICAL STORAGE – Save 70% more space with vertical storage
MAINTENANCE FREE – The walk behind lawn mower is virtually maintenance free, with no gas, no oil, and no emissions. It starts instantly, is quiet, and delivers the power you need
Customers say
Customers find the lawn mower easy to use and assemble, with good functionality that works well on sloped yards, and appreciate its lightweight design that saves space in smaller garages. The mower performs well on Saint Augustine grass and has excellent self-propelled features, with one customer noting it cuts through nearly 3-foot weeds. While some customers consider it a great value, others find it not worth buying, and opinions are divided on its size suitability for both small and large yards. The battery life receives mixed feedback, with some saying it lasts the whole job while others report poor battery performance.
4 reviews for Greenworks 40V 21″ Brushless Cordless (Self-Propelled) Lawn Mower (75+ Compatible Tools), 5.0Ah Battery and Charger Included
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Brett Kriger –
Review: Greenworks 21″ Self-Propelled Electric Lawn Mower â A Solid Prime Day Purchase
I snagged this Greenworks 21″ self-propelled electric lawn mower during a Prime Day deal, despite some mixed reviews. As a long-time Greenworks user with their edger and blower, I was confident in the brand and already owned several compatible batteries. The advertised 45-minute runtime seemed optimistic, but I wasnât concerned. In my test, the included 5Ah battery lasted just under 25 minutes, which I expected given the heavy loadâcutting thick, damp St. Augustine grass while using the self-propel feature nonstop. Battery life clearly depends on the motorâs workload, and this was a demanding test.UPDATE: I’ve cut my lawn two more times with continuing good results. The most recent time I did not use the self-propel feature at all and got about 36 minutes on the battery. It was still showing one of the four charge lights illuminated so I don’t how much longer it would have operated.This mower is a worthy successor to my aging Lawn Boy 21″ self-propelled mower. Unpacking and setup were straightforward, and I was impressed by the mowerâs sturdy, well-built constructionâsolid and durable.The variable-speed transmission is a standout feature, intuitive to adjust and responsive. Starting the mower is effortless, and the self-propel engagement mirrors my old Lawn Boy: release the bar for about half a second, and the wheels free up for easy backward pulling. The large rear wheels also further enhance maneuverability and make it easy to push without engaging The self-propel feature.The single-lever height adjustment is simple and convenient, making quick changes a breeze.Cutting performance was excellent, even through heavy, wet St. Augustine grass. The mower powered through with minimal clumping, and the side discharge chute worked cleanlyâa strong showing for such challenging damp conditions.Overall, this Greenworks mower is a powerful, user-friendly, and well-constructed machine. As a replacement for my old gas mower, itâs a clear upgrade. No regrets so farâhighly recommended for anyone looking for a reliable electric option!
Hot Mess Express –
Worth it!
Love this mower & accessories! So easy to use! And it does a great job on our rough & bumpy yard. It’s got a METAL deck which is amazing for a battery powered mower. They are typically plastic.Only 2 complaints: 1) this sucker is HEAVY. I can push/pull it with no problem while mowing, I just cannot physically fold it up to put it up by myself. 2) I wish the battery lives were longer. We can mow the yard with one solid charge, but there’s not much left after. And it takes a long time to fully charge them. Was hoping to send my tween out to earn his own money this summer mowing the neighbors yards, but that’s not very easy or practical with this type of mower requiring a full charge in between lawns.
JoMez –
Great mower for tall thick grass, but battery needs a better life.
Little workhorse mower. Self propel is a little faster than i would like but thats just me. It knocks down tall thick grass and the Only reason it didnt get a 5 stars is the battery only lasted 30 minutes. Have to get an extra battery to finish the hill i bought it for. Other than that, you wont be disappointed
Howard S. –
Worst customer service ever
Prior to purchasing a Greenworks lawn mower, I tried to contact Greenworks customer support multiple times to get advice on your products. I called 3-4 times and was on hold for as long as 45 min before giving up. Ultimately, I decided to give Greenworks the benefit of the doubt about your customer service and purchased a Greenworks lawn mower (ML 40L02) on Amazon. This turned out to be a mistake on my part. My experience has only gone downhill from there. Once the lawn mower arrived, I was excited to try it out after charging the battery overnight. The product details claim the battery will last up to 45 min and is appropriate for a 1/3 acre lawn. After about 10 minutes the battery died. I recharged the battery and tried again with the self-propelled feature turned off (to conserve power). The mower shut off multiple times when I cut the sunny portion of my yard that has moderately dense grass that hadnât been cut for 2 weeks. Again, after recharging the battery, a third time, the mower ran for 30 sec and died again. The battery appears to be defective.Optimistic that Greenworks would be able help me solve the problems and replace the battery, I called customer support again. After 55 min on hold I gave up. The customer service hours are short to begin with so there arenât many options to try calling at off hours. At work the next day, I tried the online chat and finally got a person who was entirely unhelpful. She refused to do anything to help me because I didnât know the serial number of the lawn mower. She also refused to let me chat with her supervisor or have someone contact me. She suggested calling the customer service line again but rather than wasting more of my time, I decided to return the lemon of a mower. I also send a letter to Greenworks describing what had happened but the letter to the customer service PO box was returned with no forwarding address given! This is really summed up my experience with Greenworks customer support.