The 5 Best Electric String Trimmers of 2021

Electric string trimmers, also known as weed eaters, offer a convenient way to trim your lawn after mowing it, resulting in a professional, well-manicured finish that you can be proud of (and which may make your neighbors envious).

After many hours of research and in-depth comparisons, we believe the best electric string trimmer currently on the market is the BLACK & DECKER LST136W 40V Max.

The 5 Best Selling Electric String Trimmers

For your convenience, the below list shows the 5 best selling electric string trimmers on The list is automatically updated once a day.

Bestseller No. 1
BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510)
  • Automatic Feed Spool (AFS) technology of the edger/trimmer eliminates bumping for hassle-free line...
  • The 6.5 amp motor and POWERDRIVE Transmission of the grass cutter provide maximum performance when...
  • 2-in-1 trimmer/edger with wheeled edge guide - just rotate to convert from lawn trimmer to wheeled...
  • Lightweight design with adjustable handle and height positions provide maximum comfort and control
  • Cord retention system prevents accidental cord disconnection
On Sale Bestseller No. 2
WORX WG163 GT 3.0 20V PowerShare 12" Cordless String Trimmer & Edger
  • Power Source Type: battery-powered
  • INSTANT LINE FEED Innovative push button Command Feed spool system for instant line feeding. Plus,...
  • BATTERIES ARE INCLUDED 2 powerful and lightweight 20V Power Share MaxLithium batteries come with...
Bestseller No. 3
DEWALT String Trimmer, 13-Inch (DCST925M1)
  • The edger/trimmer provides 13-inch cutting swath with 0.080-inch line
  • Gear drive transmission design of the cordless grass trimmer powers through overgrowth
  • Variable trigger with high/low speed control of the lawn trimmer is designed for added power or...
  • Lightweight, ergonomic and balanced design will help you move freely
  • Part of the 20V MAX* system of tools
On Sale Bestseller No. 4
Greenworks 5.5 Amp 15-Inch Corded String Trimmer, 21272
  • Lightweight, easy to use design, only 7.05 pounds
  • 15 inch cut path with pivoting head allows for edging and trimming capability with edging wheel
  • 0.065 dual line auto feed with electric start gets you going within seconds, no gas hassle
  • Ideal for small to medium size yards
  • Compatible GreenWorks replacement spool, model 29082
Bestseller No. 5
Greenworks 10 Amp 18-Inch Corded String Trimmer (Attachment Capable), 21142
  • 10Amp motor with straight shaft and .080 dual line bump feed
  • Light weight and simple electric start with cord lock feature makes it easy to use
  • Large 18" cutting path helps speed up the trimming process
  • Cushion and over-mold grip and handle for operator comfort with auxiliary handle for more control...
  • Quick-connect coupler allows for easy attachment changes and fits various name brands

Lawnmowers often fail to cut the grass growing along the edges of a lawn properly, since the grass often grows sideways in this area – thus requiring you to trim or edge along the perimeter of your lawn.

While edgers are designed to trim a lawn along a hard surface (e.g. driveway or sidewalk), trimmers are more versatile and can be used alongside hard surfaces, in tight spaces and along with planting beds. But tools will leave behind grass debris, clippings and dirt that you will need to clean up after the trimming process.

There is a wide variety of edgers and trimmers, ranging from simple handheld clippers to gas and electric models. Unlike gas-powered trimmers, using electric string trimmers doesn’t involve much noise, dealing with pull-string starts, or the inconvenience of having to achieve the right fuel-to-oil ratio.

The 5 Best Electric String Trimmers:

This article provides a helpful overview and quick reviews of the 5 best electric string trimmers that will help you achieve and maintain the lawn of your dreams without too much effort, hassle, and expenses.

1. BLACK & DECKER LST136W 40V Max Lithium Electric String Trimmer

BLACK & DECKER LST136W 40V Max Lithium String Trimmer

The BLACK & DECKER LST136W 40V is slightly heavier than the GreenWorks 21212 and the Makita XRU02Z, weighing in at 9.9 pounds.

With its PowerDrive Transmission (which delivers more power from the motor to the cutting string), 40V MAX* lithium battery (which provides lasting power; the battery is included), and PowerCommand dial (which allows you to choose between max power and max runtime), it successfully achieves a great balance between power, performance, effectiveness, lasting battery life and affordability.

If you need to trim thick weeds or dense overgrowth, you can set it to maximum power. If you’re planning to trim along the perimeter of a large lawn, you can set it to maximum runtime and conserve battery power. The battery comes with a real-time LED system that indicates how much battery power remains. If you plan to trim for prolonged periods of time, buying a second battery may be a worthwhile idea.

Its Automatic Feed Spool allows you to work continuously without bumping, and you can easily convert it into an edger with an easy turn of the shaft. Meanwhile, the telescopic handle allowing you to adjust the length of its handle to suit your needs. The BLACK & DECKER LST136W comes with a 3-year warranty.

2. GreenWorks 21212 4 Amp Corded Electric String Trimmer

GreenWorks 21212 4 Amp  Corded String Trimmer

Weighing only 7 pounds, the GreenWorks 21212 allows you to trim small and medium-sized yards with ease – the electric start allows you to start working within seconds (the power chord is not included, however). With its 4 amp motor, .065 dual line auto-feed, and adjustable auxiliary handle, it makes a 13-inch cut path without contributing to all the pollution caused by gas-powered trimmers.

It also comes with a rotatable shaft, allowing it to be transformed into an edger. Its telescopic shaft allows you to increase the length to an additional foot, allowing it to accommodate users of different heights. It may not be ideal for users over 6’4’’, however.

The cheap price may prompt concerns about quality – rest assured that GreenWorks 21212 was engineered to be sturdy and durable, can handle thick and tall grass without problems, and comes with a full 4-year warranty.

3. WORX WG175 32-volt Lithium Max Cordless Electric String Trimmer and Edger

WORX WG175 Cordless Grass Trimmer and Edger

With a three hour (32V) battery life, the Worx WG175 provides power and longer running time and a variety of functions: trimming, edging and mowing. It comes with a wide 12-inch cutting swath that allows you to get all your trimming and edging (it converts into an edger in seconds, all you need to do is pull the trimmer head and turn to lock it) done easily. Weighing only 6.2 pounds, it is also one of the lightest electric string trimmers on this list.

It provides a 12-inch cutting diameter with an automatic 100% single line feed (no bump) and comes with a quick-release lever that allows you to adjust the height of its telescopic height easily. Its front auxiliary handle also has 7 locking adjustments, providing maximum comfort when you’re trimming, edging, or mowing. It comes with a three-year limited warranty.

4. DEWALT DCST920P1 20V Max Lithium-Ion XR Brushless Electric String Trimmer

DEWALT DCST920P1 20V Max Lithium-Ion XR Brushless String Trimmer

The DEWALT DCST920P1 is a cordless string trimmer (powered by a 20V lithium-ion battery) that has a 13-inch cutting swath and a convenient bump feed system. It is relatively light (8.5 pounds) and comes with a long, non-adjustable shaft (65 inches) – this may suit taller users well, but can be inconvenient for shorter users (i.e. those below 6 feet in height).

With its brushless motor and patented gear drive design, the DEWALT DCST920P1 promises more torque, high cutting speeds even when dealing with thick overgrowth, and an increased life span. It has two power modes: high and low, allowing it a maximum of 4600 RPM on the low setting and a maximum of 6000 RPM on the high setting.

The trigger allows you variable speed control, without exceeding the setting’s maximum RPM. Naturally, battery endurance is lower when you use it with the high power setting (continuous running allows the battery to last for approximately 20 minutes on the high power setting and 40 minutes on the low power setting). The DCB101 charger takes about 45 to 60 minutes to fully charge the 20V lithium-ion battery.

While the DEWALT DCST920P1 provides high power and maneuverability without much noise and vibrations, it cannot also double as an edger. It comes with a 3-year limited warranty and a 1-year service warranty.

5. Makita XRU02Z 18V LXT Electric String Trimmer

Makita XRU02Z 18V LXT String Trimmer

The Makita XRU02Z comes with a built-in motor that delivers 7,800 RPM for faster cutting speed and performance. Like the GreenWorks 21212, it is relatively compact and light (only 6.4 pounds with battery, which is sold separately), making it suitable for trimming and precise edging.

Its adjustable 5-position pivoting head allows you to adjust the cutting angle when trimming in tight spaces, while the telescoping shaft allows you to adjust its length (from 48-1/2″ to 56-1/2″) to achieve an optimum cutting position.

The Makita XRU02Z also comes with several other features that enhance user convenience: an easy-loading bump and feed trimmer head; an adjustable loop handle; a built-in lock-off lever; a battery capacity warning system (with indicator light) that automatically stops the motor and notifies you when it is time to recharge the battery.

Star Protection Computer Controls™ that protects against overloading, over-discharging, and over-heating; a Rapid Optimum Charger that communicates with the battery’s built-in chip while charging to optimize battery life by controlling current, voltage, and temperature comes with a built-in fan to cool the battery while charging; category-leading charge time that allows the battery to spend more time working and less time sitting on the charger. Do note that the battery and charger are sold separately.

As with the GreenWorks 21212, the Makita XRU02Z produces zero emissions and saves you the hassle of using gas or oil. It comes with a 3-year limited warranty.


Which electric string trimmer makes the best addition to your gardening toolkit? This ultimately depends on how much power you need from all your trimming and edging work, and the variety of uses you plan to use your trimmer for.

While you can order all these products online, it might be prudent to see how compatible they are with your height at a hardware store. With the right choice of purchase, the perfectly manicured lawn of your dreams can be attained without sacrificing too much time, effort and money.

This article was last updated on March 18, 2021 .