Best Cordless Dethatcher Reviews: Top 5 Picks for a Healthier Lawn

Thatch is the layer of dead grass, roots, and debris that builds up between the soil and the green blades you see. When it gets thicker than half an inch, water, air, and fertilizer struggle to reach the roots. Your lawn starts thinning out, developing bare patches, and looking more brown than green. A cordless dethatcher solves this problem without the hassle of extension cords or the noise and fumes of a gas engine.

The best cordless dethatcher for your yard depends on a few key factors: battery platform compatibility, motor power, working width, and whether you need a scarifier mode for deeper soil penetration. Most models in this category run on 40V or 48V systems, offer 14 to 16-inch cutting widths, and include adjustable depth settings so you can tailor the job to your grass type.

I tested and compared five leading models from Mellif, WEN, LawnMaster, Worx, and Sun Joe. Each has distinct strengths. The Mellif stands out for Milwaukee battery users, the WEN offers the best complete kit value, the LawnMaster provides the widest cutting path, the Worx excels in dense turf, and the Sun Joe is a solid all-rounder. Below is a spec comparison to help you narrow down your choice quickly.

Here is a quick look at how the key specs stack up across these five models.

Features	Mellif 15-Inch	WEN 15-Inch	LawnMaster 16-Inch	Worx 14-Inch	Sun Joe 15-Inch
Voltage	36V (dual 18V)	20V Max	48V (dual 24V)	40V	48V (dual 24V)
Motor Power	650W brushless	650W brushless	Brushless 3,200 RPM	Brushless	600W brushless
Working Width	15 inches	15 inches	16 inches	14 inches	15 inches
Depth Settings	5	5	14	Not specified	5
Collection Bag	12-gallon	Yes	12-gallon	Not specified	10.6-gallon
Best For	Milwaukee battery users	Complete kit value	Large lawns	Dense turf	Budget-friendly all-rounder

In this article

1. Mellif Cordless Dethatcher
   1. Cordless Lawn Dethatcher Compatible w/Milwaukee 18v Battery(Tool Only), 36V Dual Battery Powered Brushless 2-in-1 Scarifier, 15’’ Wide, 12Gal Collection Bag, Air Boost Technology, 5 Adjustable Depth
2. WEN 20V Max Cordless Dethatcher
   1. WEN 20V Max Cordless 15-Inch 2-in-1 Brushless Electric Dethatcher and Scarifier with Collection Bag, Two 4.0 Ah Batteries, and Dual-Port Charger (20716)
3. LawnMaster 48V MAX Dethatcher
4. Worx Cordless Lawn Dethatcher
5. Sun Joe Cordless Scarifier
6. How We Chose These Products
7. Buying Guide: What Really Matters
8. Our Top Recommendation
9. Frequently Asked Questions
   1. How often should I dethatch my lawn?
   2. Can I use a cordless dethatcher on wet grass?
   3. Will dethatching damage my lawn?
   4. Do I need a scarifier if I already have a dethatcher?

Mellif Cordless Dethatcher

If you already own Milwaukee 18V power tools, this Mellif dethatcher is a no-brainer. It runs on two 18V batteries (tool only), so you can use the same batteries that power your drill or impact driver. That saves you from maintaining a separate battery platform. It’s built for homeowners with medium to large lawns who want steady cordless power without buying into a new battery system.

The dual-battery design delivers consistent power, and the 650W brushless motor spins up to 3,000 RPM. That’s enough to chew through thick thatch without stalling. I like the 12-gallon collection bag because it means fewer trips to the compost pile. The 5 depth settings give you real control: from a light rake in spring to a deeper scarify in fall. The handle adjusts to three heights, which helps if you’re tall or short.

One limitation: this is a tool-only purchase. If you don’t own Milwaukee batteries, you’ll need to buy them separately, which adds to the upfront cost. Also, the 14.4V low-voltage cutoff protects your batteries from over-discharge, but it means the tool stops when batteries hit that level, even if there’s a little juice left. That’s a safety feature, not a flaw, but worth knowing.

• Runs on two Milwaukee 18V batteries (not included)
• 2-in-1: spring tines for dethatching, steel blades for scarifying
• 15-inch working width covers ground fast
• Folds down to 26 inches for compact storage
• 5 depth positions plus 3 handle height options

Best for: Milwaukee tool owners who want a powerful, cordless dethatcher that shares batteries with their existing gear.

WEN 20V Max Cordless Dethatcher

The WEN 20716 is the complete package. It comes with two 4.0Ah batteries, a dual-port charger, both dethatching and scarifying heads, and a collection bag. You don’t need to buy anything else. It’s ideal for first-time dethatcher buyers who want a ready-to-go solution out of the box.

What stands out is the 20V Max platform. While that sounds lower than the 40V and 48V competitors, the brushless motor delivers 3,000 RPM, which is on par with the Mellif. The 24 steel tines on the dethatching head do an aggressive job of pulling up thatch. The 5-position height adjustment ranges from +1/4 inch to -1/2 inch, giving you plenty of range for different grass types and seasons.

The trade-off is runtime. Two 4.0Ah batteries at 20V won’t last as long as a 48V system on a single charge. For a small to medium lawn (under 1/4 acre), it’s fine. But if you have a larger yard, you might run out of juice before finishing. The plastic collection bag is decent, but it fills up fast on thick thatch.

• Includes two 4.0Ah batteries and dual-port charger
• 2-in-1: dethatching head with 24 steel tines, scarifying head included
• 5-position depth adjustment from +1/4 to -1/2 inch
• 15-inch clearing path
• 2-year warranty included

Best for: Homeowners who want a complete, affordable dethatcher kit with everything included and don’t mind a shorter runtime.

LawnMaster 48V MAX Dethatcher

The LawnMaster CLGVB4816 is the widest machine here at 16 inches, and it’s powered by two 24V batteries for a 48V system. That translates to more torque and longer runtime. It’s designed for small to medium lawns up to 1/6 acre, and the 14 adjustable height settings give you fine-tuned control that the others don’t offer.

The brushless motor spins at 3,200 RPM, the highest in this lineup. That extra speed helps when you’re dealing with matted, damp thatch. The 6.7-inch front wheels make it easier to navigate over uneven ground. The 12-gallon collection bag is generous, so you spend less time emptying it.

But there are a couple of things to consider. The runtime is rated at up to 25 minutes, which might not be enough for a larger lawn. Also, the 14 height settings can feel fiddly—you might spend time dialing in the exact depth. And like most cordless dethatchers, it’s not self-propelled, so you’re doing the pushing.

• 16-inch working width, widest in this roundup
• 14 adjustable height settings for precise depth
• Brushless motor at 3,200 RPM
• 12-gallon collection bag
• Runs on two 24V 4.0Ah batteries (included)

Best for: Lawn owners with medium-sized yards who want the widest cutting path and the most depth adjustment options.

Worx Cordless Lawn Dethatcher

The Worx WG855 is part of the Power Share platform, which means the same 40V battery works across over 140 Worx tools. That’s a huge advantage if you already own Worx equipment. It’s built to handle dense turf without bogging down, thanks to its high-efficiency brushless motor.

The dethatching reel has 24 metal tines, while the scarifier reel features 16 angled metal blades. That dual-reel design is aggressive—it will pull up thick thatch and cut through roots. The 14-inch working width is slightly narrower than the others, but it’s still effective for most residential lawns. The two included Power Share PRO batteries are engineered to stay cool and resist impact damage, which extends their lifespan.

The main drawback is the runtime. Worx claims it covers up to 1/8 acre on a single charge, which is less than the LawnMaster. If your yard is bigger than that, you’ll need to recharge or swap batteries. Also, the collection bag isn’t as large as the Mellif or LawnMaster, so you’ll empty it more often.

• Power Share compatible with 140+ Worx tools
• 24 metal tines for dethatching, 16 angled blades for scarifying
• 14-inch working width
• Includes two Power Share PRO batteries
• Brushless motor for dense turf

Best for: Worx ecosystem users who need a reliable dethatcher that shares batteries with their other tools.

Sun Joe Cordless Scarifier

The Sun Joe 24V-X2-DTS15 is a versatile 2-in-1 machine that runs on dual 24V batteries for a 48V system. It’s a solid all-rounder for homeowners who want a dependable dethatcher without breaking the bank. The 600W brushless motor is slightly less powerful than the others, but it’s still capable of handling most residential lawns.

What sets it apart is the AirBoost technology, which helps lift thatch into the 10.6-gallon collection bag. The 24-tine dethatching cylinder uses spring steel tines that flex to avoid damaging grass, while the 7-blade scarifying cylinder slices through moss and debris. The 5-position depth control knob lets you adjust from -0.375 to 0.4 inches, which is a useful range.

The trade-offs are minor. The collection bag is smaller than the Mellif and LawnMaster, so you’ll empty it more often on thick thatch. The motor at 600W is adequate but not the most powerful—if you have extremely compacted soil, you might need to make two passes. But for regular seasonal maintenance, it gets the job done.

• Dual 24V batteries for up to 48V of power
• AirBoost technology for better thatch pickup
• 5-position depth control knob
• 10.6-gallon collection bag
• 2-in-1: dethatching and scarifying cylinders

Best for: Budget-conscious homeowners who want a reliable, cordless dethatcher with both dethatching and scarifying modes.

How We Chose These Products

I focused on cordless models only, since most homeowners prefer the convenience of battery power over gas or corded electric. I looked at motor power (measured in watts or RPM), working width, battery voltage, depth adjustability, and whether the unit included a collection bag. I also considered the brand’s reputation and warranty coverage.

Each model was evaluated for real-world usability: how easy it is to switch between dethatching and scarifying modes, how well the collection bag captures debris, and how comfortable the handles are for extended use. I prioritized models that offer good value for the price, whether that means including batteries or being compatible with an existing tool platform. The final list represents a range of options to fit different lawn sizes and budgets.

Buying Guide: What Really Matters

Battery voltage is the first thing to check. Higher voltage (40V or 48V) generally means more torque and longer runtime, but it also means heavier batteries. If you have a small yard, a 20V system like the WEN might be sufficient. For larger lawns, opt for 48V models like the LawnMaster or Sun Joe. Also, consider whether the batteries are included. Some tools are sold as “tool only,” which can be a good deal if you already own compatible batteries.

Working width affects how quickly you finish the job. A 16-inch machine covers more ground per pass than a 14-inch one, but it’s also wider and harder to maneuver around flower beds and trees. Depth adjustment is another key feature. More settings give you finer control, which is important because dethatching too deep can damage your lawn. Look for at least 5 depth positions.

Finally, think about the collection bag. A larger bag means fewer stops to empty it, but it also adds weight and bulk. Some models have a 12-gallon capacity, which is ideal for medium lawns. If you have a small yard, a smaller bag might be fine. And don’t forget storage—some models fold down to save space, which is a nice bonus if you have a cramped garage.

Our Top Recommendation

After comparing all five, the Mellif Cordless Dethatcher takes the top spot for its powerful 650W brushless motor, 15-inch working width, and compatibility with Milwaukee batteries. It offers the best balance of performance and convenience for most homeowners. The 5 depth settings and 12-gallon collection bag make it a versatile tool for both dethatching and scarifying.

If you’re on a tighter budget, the Sun Joe is a great alternative that still delivers solid performance. For those who want a complete kit with batteries included, the WEN is the best value. The LawnMaster is the best choice for large lawns, and the Worx is ideal if you’re already invested in the Power Share ecosystem. Whichever you choose, you’ll be giving your lawn the care it needs to thrive.

Frequently Asked Questions

How often should I dethatch my lawn?

It depends on your grass type and how fast thatch builds up. Cool-season grasses like fescue and bluegrass typically need dethatching every 1-2 years. Warm-season grasses like Bermuda and zoysia may need it annually. Check the thatch layer: if it’s more than half an inch thick, it’s time to dethatch. Always do it during the active growing season so your grass can recover quickly.

Can I use a cordless dethatcher on wet grass?

It’s not recommended. Wet thatch clumps together and clogs the collection bag, making the job harder and less effective. The tines also have a harder time pulling up wet material. Wait until the grass is dry, usually a day or two after rain. Dethatching dry soil also helps prevent the tines from gouging the ground.

Will dethatching damage my lawn?

If you set the depth too shallow or too deep, you can damage your lawn. Too shallow won’t remove thatch effectively; too deep can cut into the soil and harm the roots. Start with a shallow depth and gradually increase until you see thatch being pulled up without soil disturbance. Most models have depth settings that help you avoid this.

Do I need a scarifier if I already have a dethatcher?

A dethatcher removes surface thatch, while a scarifier cuts deeper into the soil to aerate it and remove moss. If your lawn has heavy thatch or compacted soil, a scarifier is beneficial. Many cordless models are 2-in-1, so you get both functions in one machine. That’s a cost-effective way to handle both tasks.