Best Cordless Weed Eater in 2019

Top Rated Cordless Weed Eaters

If you are just here for our recommendations for the best weed trimmers then see our picks in the table below.

If you are interested in understanding more about the features and capabilities of these versatile devices, then read on.




BLACK+DECKER LSTE525 20V MAX Lithium Easy Feed String Trimmer/Edger


  • 2 speed control
  • Cutting swathe 12 in
  • Wheeled edger
  • Easyfeed nylon line
BLACK+DECKER LST300 20V Lithium Trimmer Edger


  • Lightweight design
  • Trimmer and edger
  • Automatic spool feed
  • Cutting edge 12 in


  • Brushless motor
  • Variable trigger
  • Bump feed

Greenworks 14-Inch

  • Brushless motor
  • 14 in cutting swathe
  • Built in USB charger

Worx WG163 GT 3.0

  • Edger and trimmer
  • 12 in cut
  • Telescopic height adjustment

Anyone experienced in cutting a lawn will know there are always areas which are difficult to reach, whether because the ground is uneven, or because of limited space. In order to properly tidy these awkward to reach areas you need a string trimmer.

These devices, know better known as weed eaters, are also excellent at tidying up weeds that grow on path and other areas. Other ways of referring to them include weed trimmers or weed wackers.

In essence they are versatile and a useful tool to have on hand that we guarantee you will quickly become attached to and find many a job which becomes a lot easier because you have one.

Many areas of backyards are not suited for mowing, a weed trimmer can be invaluable. Source teamrupert

What Exactly is a Weed Eater?

So what exactly does this tool comprise? In simple terms it consists of a rotating motor on the end of a waist high shaft. Attached to the motor is a nylon cord which rotates at a very high speed forming an efficient cutting edge. The operator swings the head back and forth over the weeds or grass allowing the nylon cord blade to cut neatly. They are great for clearing weeds, but in some models the head can be inverted and used very effectively for edging. Weed trimmers have been around for some time and there are many different devices to choose from.

Battery or Gas Powered

There are essentially three methods of powering your weed eater. Electric, battery or gas. We believe corded devices powered by electric are no longer a practical option for many gardeners, especially when there are so many cordless options available. The cable is cumbersome, catches on things and makes working more difficult. For this reason we are sticking to cordless weed eater models in our recommendations.

  • Corded models are the cheapest however and this may be a factor in your choice.
  • The choice between gas powered or battery powered really comes down to the type of job you wish it to do. Gas weed trimmers are more robust and powerful and can be operated for longer between refuels than most battery powered model recharges. 
  • Typically a gas weed eater weighs around 10-12 pounds which is heavier than their battery powered cousins. They are louder too and it may be wise to wear ear defenders when operating them for longer periods.
  • Battery powered cordless weed eaters, although heavier than corded models are lighter and more manoeuvrable than gas powered equivalents.
  • The typical battery operated model will deliver around 30-40 minutes of use before requiring a recharge, but this is more than enough to complete all the trimming jobs in most backyards.

Ultimately your choice will be one of convenience. A battery powered unit can be easily grabbed and used for 10 minutes before being put back on charge. A gas unit will clearly require more effort. If the job is a big one, however a gas powered trimmer is probably your go-to option.

A cordless weed trimmer is versatile and useful. Image courtesy of qbidgroup


Please note that the battery for some of the battery powered devices is not always included and requires separate purchase. If you are on a budget then this needs confirming before you commit to buy.


Weed eaters have a nylon blade that is spinning very fast. There is an obvious danger that anything coming into contact with the cutting edge will be damaged, including your skin. They also kick up a lot of debris around the cutting area which may get into your eyes. Finally, as noted trimmers can also be quite noisy.

Sensible safety precautions would include eye protection, ear protection and some good sturdy gloves.

Bump or Automatic Feed

As the nylon cord cuts the grass and weed it wears away. Most devices feed the tool in one of two ways. Additional nylon cord can be fed automatically, or by bumping the head of the trimmer against a flat surface, usually the floor.

Although an automatic feed would appear at first to be a no-brainer, in reality the automatic feeds are not perfect and tend to over feed the tool resulting in more wastage than is strictly necessary. In contrast, the bump takes a bit longer but is more reliable and more efficient.


Most weed eaters are not particularly heavy, but shoulder straps are available for some models to help keep them operating effectively if you are working for a longer period.

Our Best Cordless Weed Eater Picks

Black and Decker LSTE523 Li-On String Trimmer

BLACK+DECKER LSTE525 20V MAX Lithium Easy Feed String Trimmer/Edger

Black and Decker are a very well established manufacturer of a wide range of garden tools. They have a number of string trimmer models, in fact they are one of the most widely know weed eater brands. The LSTE523 is a great device that will manage most backyard trimming tasks with ease but is positioned at a good price point to make it affordable for almost every household.

It has an automatic line feeder is activated at the push of button, feeding into a 12 inch cutting head. 12 inches is pretty standard for most domestic trimmers. It has a 3.0 Amp, 20V Lithium battery which does come with it which provides a nice powerful cutting edge. The charge should last for anywhere between 30-40 minutes of use, which should be more than enough time to complete most domestic backyard tasks. If you are looking for a tool which handles much longer tasks then there are alternative models recommended below.

Should extra power be required for tougher weeds, the trimmer also has a second speed to enable such cuts to be made without hassle.

The head has a built in wheel which allows the unit to be easily rotated via a handle on the shaft turning the trimmer into a neat little edging machine.

Finally, the height of the shaft can be adjusted to allow the unit to be held in a comfortable position for users of all shape and size.

Things we like

  • Black Decker is convertible trimmer and edger.
  • With a 20V Li-ion battery, get a prolonged cutting experience (30-40 minutes per charge).
  • It has the Powerdrive technology that enables the device to enhance its cutting ability for tougher cutting tasks.
  • You get the chance to alternate between speed levels: more power and extended time usage.
  • It has an adjustable handle and height for user comfort.
  • The Easyfeed feature allows a simple method of extending the cutting line from a button on the handle.

Things we don't like

  • None.

Our Verdict

Most domestic users of weed eaters are looking for a balance between affordability and capability when buying tools. We believe the Black and Decker LSTE523 trimmer is good quality tool that is well built and easy to use. The automatic line feeder means there is no issue with trying to keep the cutting line efficient, the edger wheel and the handle on the shaft means that it is easily and quickly converted into an edger. Finally, the tool is affordable and provides, in our opinion, great value for money. 

Black and Decker LST300 20V Lithium Trimmer Edger

BLACK+DECKER LST300 20V Lithium Trimmer Edger

The Black and Decker LST300 is another model from the Black and Decker trimmer family. This tool differs from the LSTE523 essentially as it does not incorporate a built-in wheel to enable easier edging. However, the price point for the device is lower and as a result it represents an acceptable balance between capability and price. Although being a budget tool it still incorporates all the features you might expect from a good quality string trimmer.

It incorporates Black and Deckers Easyfeed automatic line feed operated from a button on the handle. The motor is powerful and capable of easily dealing with most backyard cutting jobs, whether it be trimming the edge of the lawn or weed wacking. A handle on the shaft allows the head to be rotated to turn it into an edger, and doubles up as a height adjustment control.

The battery comes with the unit and can be expected to run for between 20-25 minutes dealing with most tasks while doing so.

The weight of the weed eater is 7 lbs making it slightly heavier than equivalent models and this may well be a factor for some to consider as extended use could become difficult.

Things we like

  • A good quality trimmer positioned at the value end of the price spectrum.
  • You can use it as both an edger and a trimmer.
  • 20-25 minute run time for each battery charge.

Things we don't like

  • Heavier than many rival models which can cause problems for some people although compared to a gas powered model it is still quite light.
  • Not really suitable for heavier clearance work.

Our Verdict

The LST300 is well made budget string trimmer that is more than capable of dealing with most domestic backyard weed clearance tasks. It is priced to be affordable for almost everyone and it is this fact coupled with its quality build, strong manufacturers warranty and good brand name that ensures this model making it onto our list of favorite weed eaters.

DeWALT DCST990H1 40V XR String Trimmer

DEWALT DCST970B Flexvolt 60V Max String Trimmer

DeWalt are synonymous with high quality professional tools, both for the building tasks and in the garden. High quality is assured. This model has delivers a large 15 inch cutting swathe which places at the higher end of domestic trimmers capable of easily dealing with domestic weed control.

Unlike the Black and Decker models the cutting head has a double line which makes it able to deal with tougher cutting tasks comfortably. The feed type is a bump feed which we found worked easily and reliably.

Being essentially a professional tool this is heavier than many domestic only devices, weighing in at just shy of 14 lbs. Because of the weight it may well be advisable to use it with a harness for easier handling. The additional weight does make its use as an edger more difficult, although it is still more than capable of dealing with most edging tasks.

The motor is variable speed controlled by a pressure trigger on the handle making it easily adapted to different cutting conditions.

Things we like

  • Dewalt DCST990H1 is a heavy-duty, powerful trimmer suitable for all cutting tasks.
  • Large 15 inch cutting swathe.
  • plus
    Allows the alternate use of 0.080 and 0.095 nylon cutting lines.
  • plus
    Comes with the brushless motor that ensures maximum usage of battery life and more extended service of motor.
  • plus
    Comes with a fast variable speed trigger that allows users to change between more power and prolonged use (Hi/Lo).

Things we don't like

  • Has a 14 lbs weight which can be tiring in the long run during prolonged heavy duty jobs.
  • Lacks a shoulder harness to help with fatigue that might follow from prolonged usage.
  • Though it can be used for edging, this device is not for edging.
  • String change can be a bit fiddly.
  • Hgh price point.

Our Verdict

There is no doubt that the DeWalt DCST990H1 cordless string trimmer is positioned at the higher end of the pricing spectrum. This is due to that the fact that this is a powerful, well built device capable of dealing with all types of cutting task in even the most difficult of conditions. In summary if you need an efficient tool capable of cutting a larger than normal swathe for extended periods then this is the trimmer for you.

Greenworks 21362 14-Inch 40V Cordless String Trimmer

Greenworks 14-Inch 40V Cordless String Trimmer

The GreenWorks 21362 trimmer is a quality well-built tool more than capable of dealing with almost any trimming task you could throw at it. It has a high cutting swathe at 14 inches which together with its thicker 0.08 dual cutting line can deal very efficiently with large scale site clearance.

The motor is brushless making it more reliable and quieter and it is also powerful. With some trimmer models you sacrifice some power when you choose to go cordless. Not with this Greenworks model which deals with all cutting tasks easily.

The line feed is the bump type.

All of that would normally be enough to give it a recommendation, but the GreenWorks trimmer also offers the capabilty for gas attachments from other brands to be used with the motor, attachments such as cyclone blowers, cultivator heads, edging heads, hedge trimmers and a pole saw. This makes is an extremely versatile garden tool that is difficult for any serious gardener to overlook.

Things we like

  • It comes with an attachment feature which means that users of this device can utilize most of their gas trimmer add-ons on this instrument.
  • Brushless motor providing a longer-lasting battery life and a more reliable motor.
  • plus
    It has a 14” string dual line cutting swathe for a wider cut.
  • plus
    Battery provides as much as 1 hour of continuous use.

Things we don't like

  • times-circle
    The weight clocks in at 15 lbs so shoulder harness is recommended.

Our Verdict

The GreenWorks 14 inch cordless string trimmer is an excellent trimmer, capable of handling all domestic trimming tasks easily. It is more than that however, with the capability and build quality required for heavy duty clearance tasks too. But the attachment feature, the ability to swap out the trimmer and fit other cutting heads really sets this trimmer apart from other models and makes it a definite buy recommendation.

In fact, from all our cordless weed eater reviews, this GreenWorks 14-inch model would be our Best Buy pick.

Worx WG163 GT 3.0 20V Cordless Grass Trimmer Edger

Worx WG163 GT 3.0 20V Cordless Grass Trimmer Edger

The Worx WG163 trimmer is a great trimmer, perfect for backyard whacking tasks. It has a 12 inch cutting swathe which is perfect for most domestic cutting tasks, if not for more heavy duty jobs. It has a built in edging wheel which allows greater control when undertaking edging tasks, and by definition is capable of cutting and edging.

The tool is unusually lightweight, being only 5 lbs. This makes it a particularly suitable trimmer option for someone not looking for a heavier, more unwieldy device. The tool comes with two batteries included ensuring that almost every backyard task can be completed as you charge one battery while using the other.

Things we like

  • It comes with two 20V Max Lithium battery power to make sure you get the best prolonged usage for larger task.
  • Built in edger wheel.
  • plus
    A fast trimmer head turner to make switching between the edger or weedeater capabilities quickly and easily.
  • plus
    A fast release trigger for height adjustment.
  • plus
    No discharge overtime while inactive.
  • plus
    The space guard is adjustable to ensure max protection while working both in edger mode and weed trimmer.
  • plus
    Very light; about 6 lbs.

Things we don't like

  • USers have had issues with their cartridge staying in.

Our Verdict

The Worx WG163 is a lightweight but versatile string trimmer that is more than capable of dealing with everyday trimming tasks. The second battery provided allows for extended usage and its light weight means that it is perfect for users with a smaller build.

Overall this Worx cordless weed eater is a solid option priced at a afforable price point making it a good choice for almost all gardening tasks.

Our Cordless Weed Eater Pick of the Five

Going through the five devices, selecting the one we prefer above the others where pretty operose for us at some point. Several of this weed eaters out beat the other with few margins and others which were super-cooler also had some setbacks.

Based on customization, power, usage time and handling, the Black and Decker LSSTE523 came out to be a fair choice, but the Greenwork 14” takes the prize it with its attachment features and ability to act as a debris clearer.

If you are looking for a trimmer that is great in the domestic environment but more than up to dealing with heavy duty clearance jobs then the Greenwork 14” is your best option and our overall best cordless weed eater.

Basis Upon Which Our Reviews Were Conducted

The goal of this review is to provide the best guide for those who want to purchase a cordless grass whacker.  To ensure our objectives are met, we tested these top products in the market for efficiency, comfort, versatility and durability.

Our findings were cross-referenced with online reviews and complaints from customers of these tools to arrive at our final position regarding the trimmers. We hope that your experience of these weed eaters is as described in this review and would appreciate your feedback if you find something that is inaccurate or misleading.

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