5 Best Cordless Weed Eater Review of 2019

Last updated on June 6th, 2019 at 05:28 am

A nicely done lawn is the pride of any homeowner or landscaper. It not only looks good but also augments the appearance and beauty of the entire home. Unfortunately, this cannot be achieved with a lawn mower alone. You need a more specialized tool known as the weed eater or a string trimmer. You can choose the electric weed wacker, gas-powered weed trimmer or even better, one of these powerful cordless weed eater tools.

A cordless weed eater/edger/trimmer is powered by lithium-ion battery. Unlike an electric weed wacker or the gas-powered model, a battery powered weed eater is not limited by the length of a power cord and does not leave you smelling like gas or exhaust. It is an eco-friendly grass trimmer that gives you a lot of freedom to cut grass and weeds on the backyard and to trim the grass on fence lines and on the edges of patios and pavements. With it, you can trim grass for as long as the battery has charge.

Since there are many cordless weed eater tools out there on the market, it may be difficult to select the best one. For that reason, we have prepared a detailed review of the 5 best cordless weed eater units on which you can place a safe bet. Some of the factors we have considered in the review include battery capacity, tool durability, tool ergonomics, price, and buyers’ opinions based on experience.

Comparison Table of 5 Best Cordless weed eaters

EGO Power Plus 15-Inch 56-Volt Lithium-Ion Cordless Brushless String Trimmer - 2.0Ah Battery and Charger KitBlack & Decker LST136W 40V Max Lithium String Trimmer and Replacement Spool 3-Pack BundleRYOBI 40-Volt Lithium-Ion Cordless Attachment Capable String TrimmerDEWALT DCST990H1 40V MAX 6.0 Ah Lithium Ion XR String TrimmerGreenworks 14-Inch 40V Cordless String Trimmer (Attachment Capable)
Users' Ratings
  • Features a powerful high-efficiency brushless motor.
  • Has a 49 inch long aluminum shaft
  • The cutting swath is 15 inches wide
  • Features a bump feed head
  • Uses a 0.095 inch diameter trimmer line
  • Equipped with a powerful brushless motor
  • 13 inch cutting swath
  • Straight adjustable shaft
  • Requires 0.08 inch thick twisted line
  • Has a variable speed trigger
  • Features an automatic feed system
  • Equipped with a brushless motor
  • Head rotates 180 degrees
  • Has a built-in metal guide bar for edging
  • Has a cutting width of 13 - 15 inches
  • Incorporates the tap-to-feed mechanism on the head
  • Grip is rubberized
  • Accepts a 0.08 inch diameter line
  • Rotates counterclockwise
  • Controlled by a variable speed trigger
  • Fits most attachment capable systems
  • Runs on a brushless motor
  • Has a cutting width of 15 inches
  • Equipped with a powerful brushless motor
  • Has a speed of 0 - 6600 RPM
  • Controlled in 2 speed settings
  • Features a variable trigger for precise power and speed control
  • Adjustable cutting width of 14-16 inches
  • Attachment capable
  • Driven by powerful brushless motor
  • It is a 2 piece shaft
  • Charger can charge bigger greeworks batteries
  • Has a high and low speed control setting
  1. Double string head cuts more effectively
  2. Battery is interchangeable with those of other EGO tools
  3. The bump mechanism works great to release the line
  4. Stays strong until battery dies
  5. Thick string diameter makes the unit cut thicker weeds more effectively
  6. Easy to electrically load the spool
  1. Lightweight
  2. Durable
  3. Well balanced
  4. Easily adjustable length of the shaft for an operator's height
  5. The brushless motor is effective, durable, and delivers more power
  6. Easily transforms to a trimmer
  1. Double string head for increased cutting speed
  2. Long battery life
  3. Evenly distributed weight
  4. Fairly light on your hands
  5. You can add extra attachments such as the edger, hedge trimmer, and pole saw
  6. The tap to feed head lets you control the amount of string used.
  7. Can be broken into half fo easy transportation
  8. Variable speed gives you ultimate cutting control
  9. No tool required for assembly
  1. Balances well and delivers superb power
  2. Charges fairly fast
  3. Has a fairly long runtime
  4. Sturdy and durable
  5. Easy to control power and runtime with the Hi/Lo speed switch
  6. Long enough to prevent you from bending
  1. Delivers amazing torque to wack the weeds
  2. Can transform to other tools
  3. Easy to adjust string size by just bumping the head on the ground
  4. The shoulder strap takes away most of the weight
  5. Fairly priced
  6. Less vibration
  7. Well balanced
  8. Quiet enough to have a conversation with someone without having to shout
  1. Not well balanced
  2. Not compatible with aftermarket attachments like blower or edger
  3. Requires assembly tool
  4. Head does not rotate to allow you to edge easily
  5. No wheels or metal guide to assist with edging
  1. Not attachment compatible
  2. Does not have the power to easily trim very thick brush
  3. Battery takes long ( about 1 hr) to fully charge
  1. Rotates counterclockwise
  2. No shoulder strap
  3. Head does not rotate to allow you to edge more easily
  4. No wheels or metal guide to assist with edging
  1. Motor may overheat when used for a long time on high speed setting
  2. No wheels or metal guide to assist with edging
  3. Trimmer line that is thicker than 0.08" may reduce runtime
  4. Can be a little heavy when used on longer yard works
  5. Cumbersome to transport and store
  1. Quite heavy
  2. Battery does not last very long
  3. No wheels or metal guide to assist with edging
Parts Included
  1. EGO cordless string trimmer
  2. (1)2.0Ah, 56V Lithium Ion battery
  3. Assembly hex key
  1. Black&Decker Cordless String Trimmer
  2. (1) Lithium Ion battery
  3. Charger
  4. 3 pack-bundle replacement spool
  1. 40V EXPAND-IT power head
  2. Straight shaft EXPAND-IT trimmer attachment
  3. High capacity battery
  4. (1)40V lithium ion charger
  5. 0.08 inch twisted replacement line
    1. Dewalt Max XR Cordless Weed Trimmer
    2. One 40V Lithium Ion battery
    3. One charger
    4. Metal plate for mounting charger
    1. Greenworks cordless weed wacker
    2. (1)40V 2.0Ah Battery
    3. A 14/16 inch string trimmer bump feed attachment
    Weight 9 lbs 7.8 lbs 13.9 lbs 15 lbs
    Shaft 49 inches 38.5 inches - 53 inches Straight Straight Straight
    Line Size 0.095 inches 0.080 inches 0.08 inches 0.08 inches to 0.095 inches 0.080 inches
    Line Feed Bump to feed Automatic feed Bump to feed Bump to feed Bump to feed
    Battery System Li-Ion 56V/2000mAh 40V 2000mAh Li-ion 40V/2600mAh Li-Ion 40V/6000Ah 12V 2000mAh Li-ion
    Warranty 5 Years Limited Warranty and 3 years on Battery 3 Years Warranty 5 Years Limited Warranty 3 Year Limited Warranty and 1 Year Free Service 10 Year Warranty on Brushless Motor, 4 Year Warranty on tool and 2 Years Warranty on Battery

    EGO PowerPlus Brushless Cordless Weed Eater


    The Ego battery powered weed eater is designed to punish even the most stubborn grass. It incorporates a high-efficiency brushless motor that is powered by a 56V Lithium-Ion battery to deliver the power of gas. Its head is sturdy and accepts a 0.095 inches dual twist line to help you trim even the thickest of grass. The variable speed trigger on this feeder allows you more control that you can apply torque as demanded by various types of vegetation. The 49-inch aluminum straight shaft ensures that you don’t hurt your back bending and that you reach even the farthest weeds in tight areas.

    When whipping weeds with the Ego cordless weed wacker, you do not have to worry about debris being slung to awkward directions because its head rotates clockwise. The guard also protects you from flying grass and weeds. The telescoping handle on the trimmer helps you get a good balance, therefore indirectly making up for the lack of a neck strap. To match the efficiency and the power of its brushless motor, the Ego cordless weed whipper offers a 15-inch cutting width to let you complete the yard work in minutes. The bump feed mechanism, on the other hand, lets you advance more string while the string cutting blade on the guard keeps the string at a standard length.

    The Ego PowerPlus Cordless Weed Eater offers great power, the bump feed system works great, its battery integrates well with other EGO tools, and the warranty coverage is unmatched. So, if you are a gardener, landscaper, or homeowner looking to untether yourself on the yard or to save the environment from exhaust gases while you trim, the Ego Power Plus cordless weed wacker is a great replacement. It is also a great addition to your EGO tool lineup. However, it has two major downsides; it needs a hex key for splitting during storage and transportation and it has a non-attachment capable design. It also does not perform as perfect when used as an edger.

    Black and Decker Cordless Weed Eater (LST136W 40V max)


    The LST136W 40V Max Black & Decker cordless weed eater is one of the lightest yet powerful landscaping tools a landscaper, homeowner, or gardener can own. It weighs less than 8 pounds and delivers power that is comparable to that of a gas trimmer. The cordless trimmer is equipped with a brushless motor that delivers an amazing amount of torque at a maximum speed of 7200 RPM. Although it only has one speed setting, it features a variable speed trigger that gives you more control on power.

    In addition to its lightweight construction, the 40V cordless black and decker weed eater has extra features that make it flexible, versatile, comfortable, and easy to use. These features include the adjustable pole height, adjustable auxiliary handle, automatic feed system, a metal guide bar for edging, and a head that can be rotated 180 degrees. The adjustable shaft (between 38 inches – 53 inches) accommodates your height while the telescoping handle allows you to move it to the most comfortable position. On the other hand, the metal guide combined the rotatable head allows you to easily convert the trimmer to a cordless edger. The automatic feed mechanism, that takes in 0.08″ string, lets the weedeater maintain a cutting swath of 13″ without your intervention. Together, these features make the black and decker cordless string trimmer arguably the most versatile landscaping tool.

    Verdict: Although the black and decker cordless weed eater does not have enough power to eliminate heavy thick brush, it does work well on lawn grass and moderate weeds. Its easily converts from trimmer to edger and its metal guide lets you edge around patios and pavements in a straight line. The only drawback is that you might use more spools of string because of lack of direct control on how the string is advanced during operation.

    RYOBI Attachment-Capable Cordless Weed Eater


    The Ryobi battery powered weed eater powered by a 40V Lithium Ion Battery and runs off of an efficient brushless motor. However, unlike the Ego whose motor is located on the head, the motor on the Ryobi weed whipper is located next to the battery. This gives the tool a better balance. The head features a bump feed system that allows you to increase the length of the 0.08-inch dual twisted line by simply bumping it slightly on the ground. The weed wacker also features a rubber handle that can be adjusted for good working ergonomics.

    Although the guard seems a bit smaller, it keeps grass and debris from flying to you quite effectively. The only awkward thing is that the Ryobi cordless weed eater rotates counterclockwise unlike other trimmers, thus throwing the clippings to the pavement. Therefore, when weed eating with this trimmer, you need to walk a reverse path so that debris can be thrown back to the yard. Otherwise, you can use a leaf blower to clean up the pavement afterwards. The adjustable cutting swath (at 12 – 15 inches) on the Ryobi allows you to adjust the cutting width so that you can trim faster.

    Bottom line, if you are looking for a cordless string trimmer that can transform to an edger, leaf blower, hedger, or pole saw, the RYOBI 40-Volt X Expand-it Cordless Attachment Capable weed eater a perfect tool. It delivers enough torque to cut weeds and trim grass in a typical suburban yard. Unfortunately, its power is not good enough to replace the gas powered string trimmer especially if your yard is too large and covered with thick brush. Nevertheless, albeit the tool does not provide as much power, it is undeniably a very versatile cordless weed wacker for light and mid-duty applications.

    DCST990 DeWalt Cordless Weed Eater


    The DCST990H1 Max XR Dewalt cordless weed eater is one of the landscaping tools produced by Dewalt. It is a fairly powerful string trimmer that delivers the power of an average gas trimmer, therefore, saving you from cords and gasoline. It is powered by a 40V lithium-ion battery that has an unmatched ampere rating of 6Ah so that you can mow and edge more before the next recharge. Like the other weed wackers reviewed thus far, the DeWalt Max XR too is equipped with an efficient and powerful brushless motor. The motor delivers a maximum speed of 6600RPMs and a lot of torque with high battery efficiency especially when operated at low speed.

    Advancing the string on this unit is pretty easy because the head utilizes the bump feed mechanism. So, you only need to bump the head on the ground while mowing grass to dispense more string. Its large cutting swath of about 15 inches together with the thick string size allow you to easily trim heavy thick brush. In addition, the two speed settings (high and low) combined with the variable speed trigger give you more control on the power of the tool. This lets you take down weeds with more precision.

    The Dewalt battery weed eater has a couple of features that make it comfortable for use. First, it has a rubberized handle that gives you a comfortable grip. Second, the handle can move along the straight shaft so that you can get a good balance when working. Third, the shaft is long enough to allow you to whack the weeds without bending. Lastly, the unit is well balanced with most of the weight at the back. Together, these features make Dewalt weed wacker a backyard ninja. The downside as far as ergonomics is concerned is that the tool lacks a neck strap to help distribute weight so that you can work longer without feeling fatigued. Nonetheless, the tool is generally well designed for commercial grade performance

    Although a little pricey, the Dewalt40V trimmer is a big toy for adults that can be used to knock down both lush grass and serious overgrown weeds in the yard. It is also a good maintenance-free landscaping machine that delivers the power of an average gas trimmer without waking your neighbors or polluting the environment. Moreover, it is a great addition to your DeWalt tool lineup especially if you already have a DeWalt chainsaw, blower, or backpack blower which share the DeWalt 40v battery. Unfortunately, it is not attachment capable.

    Greeworks Cordless String Trimmer


    The cordless Greenworks string trimmer is another powerful battery weed wacker. It delivers the power of a gas trimmer without the hassle of having to worry about maintenance or mixing oil and gas. It is similar to the Ryobi Expand-It model and in fact accepts the Ryobi gas attachments. The Greenworks weed eater is equipped with a brushless motor that delivers a large amount of torque and quieter operations. The motor is also efficient on the battery to allow you to get more yard work done before depletion. In addition, the size of the cutting swath is reasonably wide to allow you to clear a larger area at one go.

    As far as design is concerned, the Greeworks cordless weed eater is ergonomically designed for easy work working and transportation. It is also versatile and can transform into various other tools such as a blower, hedger, edger, or pole saw. The spool is also easy to load in order to ensure that you spend more time working.

    Generally, the Greenworks string trimmer is a powerful versatile cordless weed eater that is compatible with other attachments. If you are landscaping professional looking for a replacement for your commercial gas or electric trimmer, this unit might not quite level up particularly because of the life of its battery. It is good for residential use.

    Kobalt 80-Volt Max Baretool 16-in Straight Cordless String Trimmer


    The Kobalt Cordless Weed Eater Max is a very powerful weed trimmer for effectively taming the grass and weeds on your yard. It is powered by an 80V 2Ah Lithium-Ion battery that only takes 20-30 minutes to charge from dead to full charge. The trimmer is driven by an efficient brushless motor that is located next to the battery. This gives it a very nice balance despite being quite heavy. Similar to the Ego and Ryobi, the Kobalt 80V Max also uses dual twisted line that provides at least a 15 inches cutting swath. However, the size of the string the Kobalt accepts is 0.015 inches less than that of the EGO string trimmer. The head of the tool includes the tap-to-feed mechanism that makes it very easy to advance the string while the trimmer runs. Its high and low speed button located next to the handle lets you choose how fast the head spins while the variable trigger helps to regulate the amount of power to the head. The attachment-capable design, on the other hand, lets you transform the unit to different tools just like the Ryobi Expand-it model.

    The Kobalt battery powered weed eater max is ergonomically designed. Its brushless motor located on the tail helps get a good balance to avoid overstraining and fatiguing your arm. The handle is also adjustable so that you can move it a few inches on the shaft to your most comfortable position. In addition, the weed whipper also incorporates an intuitively designed variable trigger that gives you easier control over the power of the unit. The Kobalt cordless weed wacker is also designed with safety in mind. It has a large and fairly rugged shield to protect you from flying objects. However, this canopying guard is not a substitute for donning the protective gear.

    If you are looking for a more powerful version of the Ryobi Expand-it weed wacker that accepts the universal gas attachments, the Kobalt 80 Volt Max 16-in Straight Cordless String Trimmer is a great choice. It can transform into a variety of different tools and delivers an amazing amount of power. Its high capacity battery also takes less time to fully charge thus ensuring that you are getting more work done in the least time possible. Though fairly heavy, the cordless grass trimmer comes fitted with an attachment hook for an add-on neck strap.

    How to use a Cordless Weed Wacker

    The effectiveness of a string trimmer when mowing grass or knocking down weeds depends partly on its quality and partly on the skills of an operator. In order to ensure you use your weed wacker effectively for best results, we have put together the following quick guide:

    1. Wear protective gear

      It is always important to put on safety gear to protect yourself from hazards. The three most important protective equipment to put on when operating a weed eater are:
      Eye Protection
      Eye protection equipment such as a pair of protective goggles shield your eyes from flying debris.
      Ear protection
      Hearing protection equipment protect your eardrums from being damaged by the sound produced by the string trimmer during operation.
      Closed-toe shoes
      Shoes that completely cover your toes protect you from stones and material being pelted around as the head of the unit rotates.
      A good pair of safety gloves
      Safety gloves from developing blisters and from being hurt in case of a workplace accident.

    2. Insert Battery

      Grab the battery off the charger and click it into place. Ensure that it is fully charged.

    3. Check the size of the string

      If the string is too short, advance it to the right length

    4. Start trimming

      Move the weed wacker in a side to side motion for best results

    5. Set speed

      If the weed wacker has more than one speed setting, select the appropriate speed.

    6. Pull or release trigger

      Pull the trigger to increase torque and release it to stop the motor from running

    7. Bump the head

      If the line stops cutting, bump the head slightly onto the ground to dispense more string. If the string is depleted, restring the spool.

    8. Clean the trimmer

      Once done trimming, remove the battery and wash the head of the string trimmer with water and then blow the motor with a blower to remove debris. For weedeaters with the motor in the head, be careful not to soak in water.

    9. Store

      Store the unit safely in the tool storage room or workshop.


    An electrical engineer by profession who used to work at a solar microgrid firm as an O&M supervisor. There, he realized that having the right tools for the trade is equal to getting the job half done. That's what inspired him to start this website!

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