Sun Joe 16 inch 40 V mower review

Sun Joe iON16LM 40V Cordless Mower Review – Sun Joe 40V electric mower reviews

Sun Joe iON16LM 40 V 16-Inch Cordless Lawn Mower with Brushless Motor

Approx. USD $300



Power and Performance


Efficiency and Ease of Use




Ease of locating replacement parts




Pros and Praises from buyers

  • Cheap
  • Very light
  • Easy to maneuver around lawn
  • Cuts grass well - Good grass cut quality
  • No annoying cord
  • Moderate charging time
  • Comes with grass catcher
  • Has safety key
  • Easy press button start option
  • Very quiet compared to gas mowers

Cons and complaints from buyers

  • Plastic Material
  • Bogs down when bag is full
  • Does not mulch
  • Flimsy looking wheels

Sun Joe iON16LM 40 Volt mower was reviewed and compared to other 40V electric mowers. We developed a “love-hate” relationship with this Sun Joe cordless lawn mower because it is super cheap but upon closer observation, we saw some flaws. Sun Joe created this 16″ 40V lithium-ion lawn mower for people who want a cordless electric mower alternative to their gas mower but did they achieve this goal?  To find out how well this mower will cut your lawn, here is what we did.
These are the areas of major importance to you when purchasing a mower from Sun Joe or any other brand, so these are what we focused on:

  1. Design
  2. Power and Performance
  3. Efficiency and ease of use
  4. Durability
  5. Ease of locating replacement parts
  6. Customer service from the company
  7. Value

Read Full Review – C-ELMR Product Review 100021

Product: Sun Joe iON16LM 16-inch 40 Volt mower

General Market Price: USD 300

Warranty: 2-year full warranty

Best Deal Online: Amazon

Best Current Prices on Amazon:

What’s inside the box? 

(Click on each image below the video to view individual prices on Amazon)


 1. Sun Joe iON16LM 40 Volt mower

2. Snow Joe + Sun Joe iBAT40 iON EcoSharp 40 V 4.0 Ah Lithium-Ion Battery

3. Snow Joe + Sun Joe iCHRG40 iON 40 V EcoSharp Lithium-Ion Charger

After taking a good look at this mower, we found some very good and some very bad qualities. We really wanted to like this Sun Joe mower because we love low priced mowers! But as you will see, there were some drawbacks.

To explain them better, we will start by explaining the pros and the cons of the design of the mower and then move from there to performance, power, efficiency, and ease of use then durability and overall value.

Design –  Where the “love-hate” relationship began



The boring details about the specs of the mower, what do they actually mean to you?

Take a look at this video ēxplaining the specs of the mower and how they work for you. It also shows you how to install the mower.

Even though everything seems well put together in a neat, light, little package, we found some flaws amid all the perks. The mower is light because it is mostly plastic and it does not carry all the mowing options.

[NB. The serial number of the Sun Joe iON16LM is located directly above the rear left wheel (from an operating perspective). It appears as a white sticker with black text on the gray plastic deck.]

The good:

  • Very, very light (so this Sun Joe mower is easy to maneuver around the lawn
  • No annoying cord
  • A lot less noisy (96dB) than a gas mower
  • Has a safety key
  • Easy press button start option
  • One handle height adjustment option
  • The collapsible handle allows for more storage space

The Bad:

  • Plastic material
  • Flimsy looking wheels
  • No mulching or sideways discharge option
  • Takes 2hrs to charge
  • Handles do not fold over the top of the mower for increased storage space

How powerful is the 40 volt Sun Joe ion16LM mower? 

The best measure of a mower’s power is through the battery. This mower has a 40V, 4Ah battery which means it has a theoretical capacity of 160 W-h. T

This is averaged power when compared to other mowers on the market. 

Greenworks for example, has a Pro 80V, 4Ah lawn mower that was reviewed here recently.

Check out the price for Greenworks Pro 80V, 4Ah mower on Amazon here

How well does the mower perform?

This part was where the love really began. Performance on small lawns was excellent

The good:

  • Grass cut quality was excellent.
  • Bagging was good. Nothing fell out.
  • 6-position height adjustment lever allows for grass cutting height from 1.18 to 3.15 inches
  • Handles tall grass well without stalling if the mower is adjusted to its highest height adjustment.
  • The battery allows you to cut 4000 sq ft for 30 minutes at a moderate pace with moderately grown grass (less than 5 inches growth)


The bad:

  • Bogs down when the bag is almost full.
  • Battery dies fast in thick, overgrown grass.


Efficiency and ease of use? Is it hard to mow with Sun Joe?


It comes almost fully pre-assembled. The only thing you need to do is attach the handle, charge the battery for 5 hrs initially then you are ready to mow.

The Good

  • Removing and replacing the battery is made simple – you just push the batteries in and it snaps in place.
  • Charging it is simple, just plug the charger to a power outlet and place the battery in the allotted slot.
  • Ergonomics are great. You will have no problem maneuvering this light mower around your lawn.
  • Fitting and removing the bag is no trouble at all.
  • Adjusting the handle height is made simple by the adjusters on the handle.

The bad:

  • Uncomfortable to take to and from the garage with the unfoldable handles so to make. Foldable handles would have made this a lot easier. Removing the handles each time is a bother.
  • It takes too long for the battery to charge. Nobody really wants to take a two-hour break from mowing. If you run through a battery in a mow, hang up your gloves because these guys will be charging for the next 2 hours. Or, buy an additional battery.

(….But, EcoSharp 40 V 4.0 Ah battery pack (model iBAT40) and the EcoSharp PRO 40 V 5.0 Ah battery pack (model iBAT40XR) can be used interchangeably with all iON tools if you have other 40V Sun Joe tools, that’s awesome news for you.)


Durability. How long will your Sun Joe last?

I am a bit skeptical about the plastic built of this Sun Joe mower. Steel deck mowers tend to last longer. People have had their Sun Joe plastic mower for 2 years are still counting so I guess it depends on how well you take care of your mower.

Ease of locating replacement parts

This is pretty easy. Like the mower, the parts can be ordered on Amazon and delivered to your front door.

Replacement batteries, chargers, wheels and assembling parts, blades, etc are found separately on Amazon.

Customer service from the company

Averaged because even though your questions are answered, it seems as if the answers are copied and pasted in the emails sent to you. So you basically need to pick out the section that is relevant to you. This might annoy a lot of people.

Different people may have different experiences so fingers crossed.

Value – Is this Sun Joe iON16LM cordless mower a worthy Purchase?

This mower is very cheap (current prices are shown below). To get an electric mower with a 40V, 4Ah battery that performs well at this price is rare so a big thumbs up here.

2 FAQs about Sun Joe iON16LM

Will this unit come with a charger and battery?

Yes, it does.

If you already own compatible charger and battery units, you can buy the lawn mower unit on Amazon called the Sun Joe iON16LM-CT, without the battery and charger.

Can the EcoSharp 40 V 4.0 Ah battery pack (model iBAT40) and the EcoSharp PRO 40 V 5.0 Ah battery pack (model iBAT40XR) be used interchangeably with all iON tools?


Any other questions? Drop it in the comment section below

  • Value


Good quality cut, height adjustments and overall performance but the product itself is made from plastic. This Sun Joe iON16LM cordless electric mower is suitable for small lawns and it is very cheap so if you have a small lawn, it is not a bad purchase.

6 thoughts on “Sun Joe iON16LM 40V Cordless Mower Review – Sun Joe 40V electric mower reviews”

  1. Hello Crystal,

    Thank you for the review. It is pretty detailed I liked that. 

    The sun Joe iON16LM mower link that sent me to Amazon is really cheap, thanks. I wanted to order one, but currently, there are no suppliers to my location. I also want to order two more batteries to avoid hanging my gloves for hours waiting for one to charge. I don’t like it being plastic, I feel it might not be really durable but nobody else is complaining so we will see. Thank you for the review.

  2. Hey, Great review. Looks like a good purchase option. Are you planning on reviewing other Sun Joe electric mowers?

    • Sun Joe brand of mowers is generally very affordable from what I have seen so far so we will be taking a look at others in the coming weeks. I will add the other Sun Joe mower reviews to the suggested posts section below the article as they become available.


  3. Hello Crystal,
    Excellent review of the lawn mower with all the pros and cons. According to you, plastic is not a very good material but it has the advantage that it is very light. You explain different models, with different cutting widths and prices. I also consider that prices are very cheap. It will be necessary to choose considering the surface to be cut and that the cutter will demand a very good maintenance. Thank you!


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