GreenWorks 25302 G-MAX Electric Lawn Mower Review

Aaron GreenGarden Power Tools, LawncareLeave a Comment

GreenWorks G25302 G-MAX Electric Lawn Mower Review
Greenworks 25302 GMAX The cordless lawn mowercordless lawn mower category is fast becoming filled with top quality products, and our review of the The GreenWorks G-Max mower shows just how serious manufacturers are now getting.

Not all that long a ago battery powered lawn mowers were nothing more than a gimmick, but with the latest jumps forward in lawn mower battery technology they really are now a serious contender if you are in the market for a new lawn mower.

GreenWorks have worked hard to make the G-Max a contender in a competitive industry, and they have done just that.

Read on to learn more about why we think you should seriously consider the GreenWorks G-Max cordless mower.

See our review summary here or continue reading the entire post for the in depth review.

Article Contents

On Sale Now
Greenworks 20-Inch 40V Twin Force Cordless Lawn Mower 25302
  • G-MAX 40V Li-Ion Battery System powers multiple tools for complete yard work system--includes (1) 4AH Battery, (1) 2AH Battery, and Charger
  • 20-Inch cutting deck offers a great balance of maneuverability and cutting capacity making it ideal for mid-sized areas
  • Innovative Smart Cut technology adjusts for power or runtime based on the thickness of your grass
  • Dual blades offer better cut quality, superior mulching and bagging capabilities. Automatic battery switchover pulls power from the second battery once the first is depleted to eliminate downtime
  • Kindly review the user manual under Technical Specification for troubleshooting steps and set up instructions


Greenworks G-Max Review Summary
Run Time9
Additional Features8
Ease of use8
Comes with 2 batteries
Low vibration when in use
Long run time - up to 70 minutes
Nice and light
Not self propelled - but it really is light enough that it doesn't matter
Auto throttle is slow to respond
Charger only charges one battery at a time
Worth a serious look!
The Greenworks G-MAX 40V electric mower is a light little mower that doesn't lack in power. With some advanced features that mostly work as intended, it should be on the list of mowers to consider seriously.
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Greenworks G-Max Batteries

Greenworks G-Max BatteryOne of the most frustrating things about electric lawn mowers is that they just always seem to run out of battery too quickly. Well the Greenworks G-MAX 40V electric mower has found away around this frustration, and it really is such a simple solution.

Greenworks have been able to offer up to 70 minutes of run time  out of the G-Max 40v by using two batteries – at the same time!

It features a state of the art battery switching system, so that when one goes dead it automatically switches over the charged battery and you can keep mowing.

The batteries are of the Lithium-Ion type which means that you don’t have to worry about them building up a memory and losing their charge capacity.

There is one thing about the batteries that may be confusing to some people, the two included batteries are different. They both fit the Greenworks G-MAX mower, but they are different capacities. One is 2 Ah and the other is 4Ah. I’m not really sure why they did it this way, I guess it was a way to get the run time up to 70 minutes but keeping costs down.

Our only complaint when dealing with the battery system, is that the included charger only fits one battery at a time. This can be a bit frustrating if you do have a larger lawn to mow and you need to wait for two batteries to charge.

Want to know more bout battery specs? Check out this guide.

Out of the Box and Storage

If you are worried about there being too much assembly of Greenworks G-MAX 40v Electric Mower out of the box, then don’t. The setup is relatively painless and you can have it up and ready to go in about 5 minutes. Then you just need to charge the batteries of course!

The mower has a mulching plug that is pre-installed, you will need to remove this if you don’t want to use the mulching feature.

The procedure to store the mower is fairly simple, the handle folds up quickly and easily and it stores away nice and neat. The manual does recommend that if you are storing it for any length of time, you charge the battery at least every 2 months.

Greenworkds 25302 ReviewTwin Cutting Blades

The Greenworks G-MAX 40V Mower uses a twin blade cutting system, which we found are a great feature.

We also thought the mulching functionality was top notch, even when mowing over sticks and other items that fall out of trees – the twin blades make short work of it. With just grass, there are no visible clippings left anyway on the lawn.

A 20 inch cutting deck saves you time (and your legs) as well. Because it is a little wider than most of the other electric mowers on the market, so mowing your lawns will require less passes.

The single height adjustment lever means it is super easy to adjust the cutting height of your mower in one action. There is no need to adjust each wheel individually.

Feature – Auto Throttle

The Greenworks G-Max has a built in auto throttle, which automatically adjust power to the cutting blades so the mower is not working harder than it has to. This maximizes battery run time and will also likely likely lengthen the life of the electric mower due to it not running at full throttle all the time.

In theory, this is a great idea. However we found that the auto throttle can be a little slow to react when you hit a thicker or longer patch of grass. This meant that the mower would struggle for a few seconds until the auto throttle kicked in and powered up the mower. It’s more of an annoyance than a real problem, but it should be mentioned.

Starting the Mower

The mower is simple enough to start and includes a 2 stage safety feature to keep those little fingers and hands safe.

The mower requires the user to insert a key before the start button will work. you then need to pull the bail towards the handle and release the start button to get the blades turning.

Want the Best?

See Our Best Cordless Lawn Mower article here.


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Last update on 2018-02-22 at 22:33 / Affiliate links / Details

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