Sun Joe ION100V 21LM CT Cordless Self Propelled Lawn Mower Review

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In Brief: Sun Joe Ion100v 21lm Ct Review

The Sun Joe Ion100v 21lm ct is a well-engineered lawn mower that is efficient in handling a midsized lawn. It can run for up to 45 minutes and offer an upgrade of a 5Ah battery to get up to 90 minutes of operation time. It is also easy to use. With adjustable speed and handles, you can tweak it to give you maximum comfort. The 13.2-gallon bag that comes with it will provide you with ample storage for collecting the clippings if you want to keep your yard neat and clean. All these features combined make this an excellent package for anyone looking for an efficient and purposeful lawn mower with all the comforts.

This mower is one of the many innovative products by Sun Joe. The Sun Joe Ion100v 21lm ct rivals gas-powered machines with its efficient battery.

It is a mobile machine that you can fold and transport anywhere. In addition to that, the foldable aspect also makes it easy to store as it saves on storage space.

The interchangeable battery system can be switched up and used with other equipment such as snow blowers, hedge trimmers, or chain saws. This adds to the versatility of the unit.

Key Specifications of Sun Joe Ion100v 21lm Ct Lawn Mower

Sun Joe iON100V-21LM-CT 21-Inch 100-Volt Max Lithium-Ion Cordless Self-Propelled Lawn Mower, Tool Only (Battery and Charger Not Included)

The Sun Joe Ion100v 21lm ct is powered by the ION series, which features lithium-ion cells with a high capacity of 100 volts. These offer outstanding results and are environmentally friendly due to the zero carbon emissions.

With power options varied for customer’s choosing, one can pick up a 2.5Ah battery charger and last for a good 45 minutes or get the 5Ah battery for an up to 90 minutes continuous running time.

The thing I like most about it is the self-propelling motor, which saves time and energy and delivers good results.

The adjustable features are also something most people will enjoy this product. You are able to tweak the speed and walk along with it without feeling rushed.

The presence of a telescopic handle lets you adjust the height to make it more comfortable, and when not in use, this feature also assists with compact storage.

The build of this machine is to ensure the comfort and ease of the user without sacrificing the output. Its different cutting height settings range from 1.2 inches to 3.75 inches.

If you want to learn more about how it operates, have a look at this demonstration video:


Key Specifications –

Cutting width
21 inches
Power type
2.5 Ah lithium ion battery
Cutting style
61.7lbs (28kg)

Unique Features

The Sun Joe Ion100v 21lm possesses some unique features that make it an exceptional product in the market.

Environmentally Friendly

This product is environmentally friendly. It does not require gas and uses a battery that is rechargeable and has zero carbon emissions.

The 2.5 Ah battery gives you 45 minutes, but I’d recommend the 5.0 Ah battery, which lasts up to 90 minutes, making sure you get the job done.

Impressive Motor Performance

The Sun Joe Ion100v 21lm possesses the ION’s 1000 Watt brushless motor. It ensures efficiency by providing maximum motor performance and extended motor life to ensure that the job is done.

Adjustable Cutting Height

The ability to customize your height is one of the things I love the most about this product.

Using the ION’s 7-position height adjustment lever, you can choose varying heights from 1.2” to 3.75” to ensure precision and nice-looking trim on your lawn.


Power, Design, and Durability

Here are some of the biggest considerations when it comes to a lawn mower:


The high capacity 100 volt-lithium battery cells deliver exceptional performance. Apart from being environmentally friendly, the well-engineered iON’s 1000 Watt brushless motor is highly reliable, with 2.5 AH and 5 Ah batteries.

The powerful motor performance also decreases noise vibration and has an extended life.


The design of the Sun Joe iON100v-21LM is quite modern and lightweight. It weighs up to 61.7lbs (28kg), making it a very easy machine to handle.

The innovative design of the tires ensures smooth movement and customizable movement settings to provide comfort in movement and operation. This model also possesses hand-operated safety controls.


With the iON’s 1000 Watt brushless motor, durability is guaranteed. This brushless motor is able to provide you with maximum rotor performance and also an extended motor life.

This will make sure your lawn mower will continue running and working as expected in the days to come.

The 20-inch cutting width also lets you chug through tough grass quickly and easily without the need for repetitive trimming.

Cut Quality and Available Options

The freedom of operation in using this product is exceptional with the use of adjustable cutting heights to suit the needs of your lawn. Whether it is during the dry or rainy period, this machine does the work perfectly.

If your lawn has dry and sandy soil, it is best to turn up the lawn mower to its maximum settings of 3.75 inches.

If it is rainy or moist with the occasional sun resulting in the rampant growth of grass, you can set it to the cutting height of 1.2 inches for maximum clearance of any overgrown grass.

The bag system, which is also included in the purchase, allows you to collect the grass. This is important as it prevents the grass from becoming dried thatch, which suffocates your turf layers.

Depending on your preferences, you can set the mower for side discharge allowing the small cut grass to feed important nutrients such as nitrogen back to your lawn for vigorous growth.

Performance and Ease of Usage

When talking about the Sun Joe Ion100V- 21LM-CT, ease is one of its strongest points; courtesy of the self-propelled speed dial that allows it to move at your normal walking speed.

One can mow all day comfortably without frustrating your shoulders because of being forced to walk faster.

Telescoping handles are also great features worth mentioning in the Sun Joe iON100V-21LM-CT as they enable you to set your desired height to ensure comfort.


Ease of Maintenance, Repairs, and Warranty

It is a piece of electric equipment that saves you the ordeal of buying gas over and over. You will spend less cash on maintenance and avoid the messy changes when filing up your lawn mower with gas or oil.

The only dollars you will spend will be on purchasing the replacement blades. Buying new blades is better and more desirable than trying to sharpen the delicate blades by yourself.

Care for the batteries that power this product is also essential. Lithium-ion batteries are favorable and easier to maintain than lead-acid and Ni-MH batteries. Also, be careful not to overcharge them.

It is preferred that you buy the 5Ah battery and the accompanying charger. This way, you won’t have to worry about the battery even when using the lawn mower for long periods.


The warranty offer really exceeds expectations as you get a 2-year warranty for free repair for any built-in defects, or damage that occurred to the product. The return policy does not involve any hassles.

There are various ways to contact Sun Joe. You can reach them through this number: 866-766-9563.
Website: Sun Joe

Their working hours are Mondays to Friday 9 am to 7 pm EST and Saturday-Sunday 9 am to 4 pm EST. You can also email them at [email protected].

Price of Sun Joe Ion100v 21lm Ct Lawn Mower

The cost of the sun Joe Ion100v-21lm-ct is quite affordable, and spending your money on this product will definitely be worthwhile.

The efficiency of the product, its capabilities, and the fact that it is both durable and environmentally friendly, making it the best choice for anyone looking to preserve our world and save on maintenance costs.


Why We Like It

This product personally gives you many reasons to love it, starting with the fact that it is electric and that you don’t have to deal with the changing oils.

The main reason I love this product and would definitely recommend it are the adjustable telescoping handles, the adjustable cutting height, and the environmentally friendly.

All that said, this is a good lawn mower that will perform as expected and be very comfortable to use.


Last update on 2024-06-14 / Affiliate links / Images from Amazon Product Advertising API

About Donald Parker

Donald has more than 15 years of experience of working with power tools. But his main area of expertise is working saws, especially chainsaws.

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