Sun Joe iON100V-21LM-CT Cordless Self Propelled Lawn Mower, 21-Inch

Last updated date: June 5, 2020

DWYM Score

8.4

Sun Joe iON100V-21LM-CT Cordless Self Propelled Lawn Mower, 21-Inch

Why Trust DWYM?

DWYM is your trusted product review source. Along with our in-house experts, our team analyzes thousands of product reviews from the most trusted websites. We then create one easy-to-understand review. Learn more.

Don't Waste Your Money Seal of Approval
Look for the DWYM seal for products that are the best in the category.
Show Contents

We looked at the top Self Propelled Lawn Mowers and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Self Propelled Lawn Mower you should buy.

Update as November 29, 2021:
Checkout The Best Self-Propelled Lawn Mower for a detailed review of all the top self propelled lawn mowers.

Overall Take


In our analysis of 120 expert reviews, the Sun Joe iON100V-21LM-CT Cordless Self Propelled Lawn Mower, 21-Inch placed 17th when we looked at the top 23 products in the category. For the full ranking, see below.

From The Manufacturer

Powered by the latest revolution in the legendary iON series, Sun Joe features high-capacity, 100-volt lithium-ion battery cells that deliver no-fade power performance. Pick a 2.5 Ah battery for mid-size lots and up to 45 minutes of mowing time; or upgrade to a 5.0 Ah battery for larger lots and up to 90 minutes of continuous runtime! The variable, self-propelled motor saves you time and energy, moving the unit forward for an effortlessly beautiful lawn without all of the strain!

Expert Reviews

Expert Summarized Score

8.5
5 expert reviews

User Summarized Score

8.1
23 user reviews

What experts liked

The sensitive adjustment of the speed dial lets you set it to a pace that closely matches your own walking speed. At the same time, the adjustable telescoping handle also lets you accommodate your height for maximum comfort while mowing.
- Lawn Mower Review
This new mower from Sun Joe has several top features such as a 100v brushless motor, a variable speed self propelled system, a 7 position height adjustment, and the option to side discharge or bag the grass clippings.
- Tool Craze
With the 100 V lithium-ion battery, the mower can cut grass for 45 to 50 minutes. You can also cover large areas with the wide durable blade that cuts around 20 inches of grass in each pass.
- THE TECH KIT
This mower has 2 settings for grass discharge you can either use the supplied 13.2-gallon grass collecting bag or attach the discharge chute that will direct the grass clippings back into your lawn.
- Green Thumb Planet
The 7-position height adjustment feature makes it the perfect choice for people of any height.
- Gardening Freaks

What experts didn't like

Self-Propelled Dial Isn’t On Handle. Battery Is An Additional Purchase. Charger Not Included.
- Lawn Mower Review
Not usable in the rain.
- THE TECH KIT
Not the perfect choice for bigger lawns.
- Gardening Freaks

Overall Product Rankings

An Overview On Self Propelled Lawn Mowers

A well-kept lawn is a thing of beauty. Not only is it nice to look at, having perfectly mowed grass makes it more enjoyable to have fun out in your yard. However, if you have a sizable grassy area or just don’t enjoy sweating while pushing a manual lawn mower along, then a self-propelled lawn mower may be a good choice for you.

Walk-behind push-mowers are powered by your strength, where you move them by pushing them over the grass you want you cut. A self-propelled lawnmower takes most of the manual labor out of mowing your yard because it is powered by a transmission. Typically, this kind of lawnmower runs on gas, though there are some that are cordless electric models as well. You can find self-propelled lawn mowers that come with variable speeds, which the operator controls in order to move the mower forward. For most people, a single-speed mower will do the trick. If different people with unique walking speeds will be using it, then you may need a variable speed mower. Instead of having to push the lawnmower, though, you only have to walk behind the mower and steer it where you want to go.

Self-propelled lawn mowers that are front-wheel drive provide more dexterity when it comes to turning and maneuvering. This kind of mower is perfect for those who have flat lawns. On the other hand, if you have a sloped lawn, then a rear-wheel drive lawn mower is a better choice. These offer better traction on curved land.

The biggest benefit of self-propelled lawn mowers is the time and energy you save. You can get the job done much faster without exerting a lot of effort. If you have thick grass, you don’t have to worry about pushing your lawnmower through it because the gadget will power through on its own. If you have a slope, your mower should be able to propel itself along the incline as well.

With a powerful machine like a self-propelled lawnmower, safety is a key concern for many shoppers. Keep in mind that many mowers come with a built-in safety feature where the mower only starts and runs if the operator squeezes a bar on the handle. If they let the bar go, then the mower stops. This way, if you slip and fall on the ground, you won’t be near spinning blades. You also don’t need to fiddle with complicated on/off switches or dials as the blades shut off automatically.

The Self Propelled Lawn Mower Buying Guide

  • The first thing to consider when looking for a self-propelled lawnmower is what kind of yard you have. The size and shape of your yard, as well as the kind of grass you have and the amount of slope on your lawn will affect what kind of lawn mower you need. For example, if you have a flat lawn, then you may want to consider a front-wheel drive lawn mower, instead of a rear-wheel drive lawn mower which is better for sloped yards.
  • Take a look at how easy it is to start your self-propelled lawnmower. Traditional ones have a recoil start with a pull rope. By tugging on the rope, you pull a cord, which then turns over the engine to start the self-propelled lawnmower. For some people, having to pull the rope with a recoil-start mower can be difficult. In this case, look for an electric-start mower. These are simple to start up with a key or a push button.
  • Be sure to consider whether the lawnmower has swivel wheels. This is especially important if you have curved flower beds or gardens within your lawn, or if your lawn is an irregular shape. Turning self-propelled lawn mowers can be difficult, which is why having swivel wheels is an important feature. These provide you with more control and maneuverability when steering your mower.
  • What do you want to do with your grass clippings? Many self-propelled mowers give you three key options. You can either discharge the clippings directly onto your lawn off the sides of the mower, you can collect the clippings in a bag at the rear of the mower, or you can turn the clippings into mulch as you cut the grass.
  • If you want to select the height you cut your grass, many mowers have adjustable settings where you can choose how short to trim your lawn. This is a useful feature for those who enjoy manicuring their lawns.
  • It’s important to keep your self propelled lawn mower clean, especially from the inside. Look for a mower that has a wash-out port on the deck. This way, you can just hook up your garden hose to the mower and rinse out all of the grass clippings from the blades. This helps to increase the life of the mower.