GreenWorks 25302 20” Mower Review: Worth $ For 2 Blades?


GreenWorks 25302

UPDATE (MAY 2017): The GreenWorks G-Max 25302 has been recalled due to to a potential fire hazard. Please click here for instructions and details if you own one of these mowers. 

Though our original review is below, and this mower was well-loved by consumers, we can no longer recommend it due to the recall. However, there are some fantastic alternatives available in a variety of price ranges. If you’re shopping for a battery-operated mower that can handle your entire yard, we’ve put together this list of the best cordless mowers just for you.

Looking for an economical cordless lawn mower that is as hearty and reliable as its gas powered counterparts? If so, you might want to take a look at the GreenWorks 25302 20” Twin Force lawn mower. With two batteries that are not only recyclable but that last a good long while and five height settings for cutting, it might just become the next garden tool on your wish list.

Video Review


What's Included?

• G-MAX 40V 20” Twin Force Mower
• 2 Lithium Ion Batteries (1 40V 4Ah battery; 1 40V 2Ah battery)
• 1 Charger
• Mulch Plug
• Rear Discharge Hard Top Bag
Owner’s Manual


Who is it best for?

  • Lawns of ½ acre or less
  • Older or smaller users who don’t want the weight of a gas – powered machine
  • Those who want to mulch and cut grass with the same unit
  • Anyone who doesn’t want a cord getting in the way


• Very light weight and easy to handle
• Nice long battery life
• When one battery dies, other battery automatically starts working
• 5 different height adjustments
• No cord in the way
• Batteries are interchangeable with other GreenWorks tools (leaf blowers, hedge trimmers, cultivators, pole saws, snow blowers)


Quick Stats

  • Overall Dimensions: 21” high x 22” wide x 32” deep
  • Deck: 20”
  • Battery: Li-Ion
  • Horsepower Rating: 2.5 for each motor
  • Blades: 2 10” blades
  • Bag Discharge: Rear
  • Wheels: 10” rear; 7” front
  • Handle: Foam padded
  • Weight: 42.5 lbs (without batteries)
  • 4Ah Battery Weight: 3 lbs
  • 2Ah Battery Weight: 1.5 lbs
  • Deck Material: 24
  • Cutting Heights: 5 – 1 3/8”, 1 7/8”, 2 3/8”, 2 7/8” and 3 3/8” (35.05mm, 47.75mm, 60.45mm, 73.15mm, 85.85mm)
  • Charger Voltage: 110V
  • Warranty: 4 years for the main unit; 2 years for the batteries


While complaints of this GreenWorks 20” don’t seem to be common, there are a few issues users have brought up. One of them is that there is no light on the mower for if you are mowing your yard in low light. While this would be an additional nifty feature, we don’t think it’s really necessary since most of us mow when it’s light outside.

Second, it won’t pick up or mulch pine cones or larger branches. It does a fine job on smaller objects and twigs, but don’t give it anything too big to eat. It will pick up and mulch pine needles, but not pine cones like those from a Douglas Fir for instance.

The only other concern is how long the batteries last. If you have a huge yard that takes you more than an hour to mow, you may want to look at using a regular gas powered machine. The two batteries combined in this one should last through about 70 minutes of mowing time, but it could be less if you have very tough or dense grass.

Is it easy to assemble?

In reviews from users who bought the Greenworks 25302, one of the things they say is really easy is putting it together. In fact, no tools are needed at all. Essentially, you just need to unfold the handle and hook on to the base. The handle is adjustable, so just connect it so it’s comfortable for your height. In fact, one reviewer said the battery came with enough charge to mow his 2400 square-foot lawn.

To get it operating, all you need to do is make sure the safety key (which comes with it) is inserted. Then push the button, then pull back the handle to start it.

How high will it cut the grass?

The highest it will cut is 3.38”, which is quite a bit higher than the 2.75” maximum of many other push or walk behind mowers. If you’re a real mowing aficionado, there might be times when you want to cut your lawn at different heights, such as shorter so the sun can reach the soil or longer to retain moisture, but most of us are happy keeping it at one length all season long.

It’s also easy to adjust for different heights. Instead of having to adjust each wheel, all you need to do is move one lever into the desired position, and you’re ready to go. It will adjust for five different cutting heights of 1.38”, 1.88”, 2.38”, 2.88”, 3.38”, so you have quite a few choices for what might work best for you.

How is the quality vs price?

Overall, this unit is a great deal for the price. Since the housing is a plastic composite, you might assume the quality isn’t so high. However, in reviews, many people say they regularly transport it to mow other yards, and it holds up well and it’s very resistant to getting dinged, dented or cracked by stones or other debris. An added bonus is that the plastic components make it incredibly light when compared with a regular gas powered or even corded electric mower.

One user was so impressed because it even cuts tough St. Augustine grass without a problem.

How good is it at mulching leaves?

The Greenworks 20” does a great job at mulching leaves as long as you don’t let them build up too deep. So, if you have just a few inches of leaves, it should work fine, but if you have quite a pile, you’ll want to rake them down into a nice even layer before attacking them with the mulcher.

Is it self-propelled?

While the 25302 is not self-propelled, it’s light enough so this feature isn’t really missed. Due to its plastic composite body, it’s really easy to both push and pull, even up and down hills if needed. In fact, it’s about 40 pounds lighter than a comparable gas mower. In many a review, users say they’re happy with it and its maneuverability. The only time reviews say it might be difficult is if you let the grass get really high; then it’s harder to push.

Is it loud or quiet?

When compared with other models, this one is an incredibly quiet machine, and it’s a whole lot quieter than a gas powered model. In fact, it’s easy to have a conversation while its running and you’re standing right next to it.

One user in her review said the motor is actually silent and the only noise comes from the spinning blades and the grass being cut. She says it does make a whirring noise when going over gravel or twigs, but that’s it. She said the noise is a lot like that of a box fan you’d put in your window.

How does it handle twigs?

While a lot of electric or battery powered machines either with or without a cord are too wimpy to handle small twigs and sticks, this one seems to do just fine. It’s not going to handle large sticks (and you wouldn’t expect it to), but small twigs are fine.

Does the bag catch all the clippings?

In user reviews, occasionally someone will complain that the bag is not catching all of the grass clippings. There are a couple of reasons this might happen. First, make sure the bag is not full. If it is, there are nowhere for the additional clippings to go, so it must be emptied to work properly.

Second, make sure the mulching plug is not in the mower. You should have either one or the other – either the bag or the mulching plug. If the mulching plug is in, the bag will not collect the clippings.

Do I have to use the bag?

Since this is a mulching and grass cutting mower, you don’t have to use the bag to catch grass clippings if you don’t want to. Instead, you can use it like a mulcher, insert the mulch plug instead of the bag, and it will throw out the clippings.

The bag discharges clippings from the rear, as opposed to some others that discharge from the side. The reason for this is that it has two blades side by side underneath, and having it discharge to either side would get in the way of their spinning action.

Getting the bag off is also really easy, which can’t be said for some other mowers of this type. You just lift it off, empty it, and clip it right back on.

Is it easy to store?

The short answer is… yes. This model folds down to about 14” – 16” for easy storage so you can slide it under shelves in your garage or into narrow spaces. As far as hanging it on a while, that’s doable as well as long as the bracket on which you hang it is attached to some sturdy wall studs.

As far as standing it up to store it – that’s not recommended as it would be very unstable in that position since the mowing deck is wider than the wheels.

Does the height adjustment raise all the wheels?

Yes, when you adjust the cutting height, all four wheels get either raised or lowered.

How does it handle dusty or sandy yards?

If you live in Florida or even in a more desert-like climate, you might notice your lawn care tools get very dusty and dirty very quickly and can get gummed up. This raises the question as to whether this is a problem with the GreenWorks 25302 Twin Force.

People who have owned this machine for a few years say that yes, it does get dirty (like any lawnmower of course), but all you need to do is hose it off, and it’ll be like new again.
As for handle grass with sparse or sandy patches, it works very well. It even chops down tough weeds.

Does it make a nice even cut?

If you don’t let the grass get too high, you’ll be in good shape as far as getting an even cut. However, if you’ve let the grass get really long, you’ll likely need to make a few passes for it to look even. In reviews, it’s said it cuts just as good as any gas mower as long as you keep the blades sharp.

One of the ways it’s able to provide a consistent cut is its sensory technology. This technology senses how tough or high the grass is and adjusts the power output accordingly. So, if you’re going over a flat area with low grass, it won’t put out as much in the way of RPMs, and if it hits a tougher spot, it ramps up the power to keep up.

How does it handle thick grass?

If your lawn is very thick or dense, this is a very valid concern. The answer is that it seems to do just fine. You just have to go a bit slower to allow the blades to cut. Going slower also means the batteries will run down faster than they would if you had a “normal” yard. Still, it does run up to 70 minutes on one charge, so as long as you don’t have a huge yard, you should be just fine.

One review by a man who has several thousand square feet of thick grass that hadn’t been cut in two months said he went a bit slower and made two passes – the first with the cut level set higher and had no problem getting it done.

It also helps if you wait until the grass is dry before cutting it – that way the blades work more efficiently, and it won’t take as long.

Are the blades strong and durable?

Really, the blades on this cordless model are just as good as the standard. You can sharpen them just the same as you would any lawn mower blade to keep them at peak efficiency.

Most users say they’ve used it for a full year without sharpening the blades, and it’s still working great. It’s good to know though that experts recommend sharpening the blades on your lawn mower twice per season to keep them in great working order and your lawn looking good.

How does it work on uneven ground?

Really, they work just as well as a single blade unit. The blades are recessed above the bottom of the deck, so if you’re on uneven ground, the deck might be more likely to hit the ground, but as long as the blades can reach the grass, you’ll still be fine.

Cutting blades vs cords or lines – which is best?

While some cordless and electric machines use a cord or string or line like you might find on a standard weed wacker or trimmer, this one uses blades like a regular fuel powered lawnmower. The blades are steel and can be sharpened as well. The blades are twin blades, meaning it has two ten-inch by two-inch blades side by side, and they cut well.

How is the extended battery life?

Many users have asked if you should store the batteries in the mower for extended periods of time (like throughout the winter). The answer is no, especially if you store the machine outside. While the battery compartments keep water out and the lithium ion batteries aren’t harmed by extreme heat or cold, it’s best to keep the protected and stored indoors if the lawnmower’s going to sit for a long time. Some people say the batteries have retained a full charge even after sitting for more than four months.

For seasonal use, the manufacturer recommends storing the batteries at half charge outside of the mowing unit if you’re storing them for more than four months. Look for two lights on the battery to see the amount of charge. You can even leave them on the charger as long as it is unplugged.

As far as the extended life of the batteries, they do come with a two year manufacturer’s warranty, so if they die prior to that time, you can get them replaced. Their life really depends on how much and how often they are used, but the manufacturer estimates they will last at least six years when purchased new.

How long do the batteries last?

With the two Lithium Ion batteries it comes with combined, you can expect about 70 minutes of mowing time. This is plenty to mow a whole lot of yard! If you want it to last a little bit longer, you can purchase an additional 4Ah battery. Using that combined with the one included, you’ll extend the time by approximately 15-20 minutes. If you don’t need as much, you don’t need to keep both batteries in at the same time for it to work – you can just use one or the other.

This model also has an automatic switch over feature, meaning that if you have both batteries in place and one runs out of juice, within one second it will switch to the power of the other battery to keep running.

One user review from a man who has a huge uneven lawn says he hasn’t noticed any uneven areas at all, and he can easily mow his 5,000 square foot yard without draining both batteries.
The good news is you don’t have to wait until they are completely depleted prior to charging them. According to the manufacturer, their lithium ion batteries do not have a memory effect, and charging them when they’re not fully depleted won’t do any damage.

Another great thing about the batteries that are included is that they are compatible with other GreenWorks products like their hedge trimmers, leaf blowers, pole saws and cultivators.
It takes about 120 minutes to charge each one, and you’ll know when it’s ready because the light on the charger will turn from red to green.

How easy is it to use the batteries?

One complaint about the batter is that in one review, the user had trouble getting the battery into the charger. For safety and to ensure a good connection, the battery snaps into place in the charging cradle, so you need to make sure it’s really in there so it will charge. When it’s seated correctly, you’ll hear a click and the charging light will go on. It takes about two and a half hours for the batteries to charge.

One user asked if this Greenworks model can be run from an extension cord, and the answer is no. It will only operate on the batteries. This is great if you don’t want a cord getting in the way. If you’re looking for a corded model, it’s best to buy a different machine.

Can the batteries be recycled?

Yes – they can. The owner’s manual recommends contacting your local waste disposal company or agencies for directions on where to take them when the time comes.

How good is it in terms of safety?

The main safety feature is the incorporated right into the handle. In order to start it, you need to push the button, and then pull back on the handle. If you let the handle drop while mowing, it will shut off. There is no safety key (the previous model had one), as it’s not necessary with this updated feature.

There are things you can do to prevent accidental startup, though it’s hard to have one of those. However, if you have kids or others around that you don’t want starting the mower just for play, all you need to do is remove the batteries, and this can’t happen.

How much will the bag hold?

According to the manufacturer, the clippings bag can hold up to 52 liters or 1.5 bushels (14 liquid gallons) before it needs to be emptied.

Do the wheels have ball bearings?

This model does not use ball bearings in the wheels. Instead, there is a sleeve, which seems just as dependable according to user reviews.

What is Twin Force?

The twin force part of this mower just means there are two motors working together driving two separate blades. This creates more power and impact than a single motor or blade, thus making cutting your lawn easier and more efficient.

What’s the difference between the 25302 20” Vs the 25223 19” model?

There are a few main differences in these models. The main difference aside from the smaller cutting deck is that the 19” model has smaller blades, so it has less rotational weight that allows for slower revolutions per minute when you need less. It also only has one blade powered by one battery. In user reviews, it is said that the dual blades of the 20” Twin Force make a smoother cut.
The other big difference is that while they both offer mulching and bagging features, the 25223 discharges clippings from the side rather than the rear of the unit.
The 20” 25302 also has smart cutting technology, so overall it does a slightly better job of cutting the grass in that it makes the mowing more efficient.

What’s the difference between the 20” model and the 25322 model with a 16” deck?

Really, the only difference here is in the size. If you have a larger lawn, you may want the wider cutting deck so you can make less passes. However, if you have tighter areas to squeeze through or a steep hill, the smaller one may be a better choice since it’s lighter in weight and thus easier to maneuver and push.

Overall Impressions

The GreenWorks 25302 rechargeable twin force mower is a great investment if you want a lightweight machine without the hassle of a cord. The batteries last a good long while, and it cuts just as well as any gas powered lawnmower. People who have smaller yards (about ½ acre or less) love these for their ease of use and consistency. However, if you’re set on having the constant power of a corded model, it’s best to shop for a different electric option.

Overall, reviews rate this model at 4.5 out of 5 stars, and with good reason. It’s easy to use and maintain for people of all ages – even if you aren’t that strong. As long as you keep the batteries charged up and the blades sharp, it will keep your grass looking neat for years to come.