In recent times, electric weed eaters and other lawn care equipment are becoming increasingly popular. A contributing factor to this increment is their quietness, low emissions, ease of handling, hassle-free maintenance and the ability to deliver almost similar performance as gas powered tools.

A recent advancement in these tools is the battery powered weed eaters. These eliminate the need for the long electric cord that is synonymous with electric lawn care tools. You can take your tool to wherever you want. Their effectiveness depends on the capacity of the battery installed in them.

These power weed eaters come in all shapes and sizes. Finding that right tool with the right battery life and cutting power is a real challenge. To come to your aide, we have put together this buying guide of the best battery powered weed eater. Some of the best products have been reviewed in details to give you a head start.

Top 10 Battery Powered Weed Eaters

DEWALT DCST920P1 20V MAX 5.0 Ah Lithium Ion XR Brushless String Trimmer13 Inches$$
BLACK+DECKER LSTE525 20V MAX Lithium Easy Feed String Trimmer/Edger with 2 Batteries12 Inches$
WORX 32-Volt GT2.0 String Trimmer/Edger/Mini-Mower with Tilting Head and Single Line Feed12 Inches$$
BLACK+DECKER LST136W 40V MAX Lithium Ion String Trimmer, 13"13 Inches$$
Greenworks 40V Cordless String Trimmer & Blower Combo Pack STBA40B21012 Inches$$$$$
13 Inches$$
BLACK+DECKER LST300 20V Lithium Trimmer/Edger, 12"12 Inches$
WORX WG163 GT 3.0 20V Cordless Grass Trimmer/Edger with Command Feed, 12", 2 Batteries and Charger Included12 Inches$
Greenworks 13-Inch 40V Cordless String Trimmer, 2.0 AH Battery Included 2130213 inches$$
DEWALT DCST990H1 40V MAX 6.0 Ah Lithium Ion XR String Trimmer15 inches$$$

How to choose the best battery powered weed eater

Choosing the best battery powered weed eater might seem pretty easy. However, this is not always so. There are certain things that have to be considered. These are what distinguish the best from the rest. Before you settle on any weed eater, consider these features.

Power output and battery

The power output of any battery powered weed eater is what sets it apart from the rest. It is what makes you accomplish the particular task that you want. The battery in the weed whacker should be high voltage to trim any type of grass no matter how tough it is.

The best battery powered weed eater has a long-lasting battery life and delivers the same high powerful performance that you need. A battery that needs frequent charging will be a huge inconvenience if you intend on mowing a large piece of lawn. Nickel Cadmium batteries are known to require frequent charging, unlike their Lithium-ion counterparts.

Cutting swath diameter

Trimmers with a larger cutting diameter are more efficient in their use of torque and keep the cutting speeds high. A longer cutting line enables you to perform the work faster than a shorter one would take.

The cutting diameters range from 13 inches to about 16 inches. This length if increased beyond certain limit weighs down the trimmer. This uses more power and drains the battery faster. You are advised not to remove the guard to increase the cutting swath.

It’s not like it is all doom for smaller cutting diameters. They still find use in areas with a lot of obstacles. The short diameter is easy to maneuver around rocks, fencing and lawn furniture.

Sound level

Electric weed eaters are generally quieter than the gas-powered types. However, even the electrical ones differ in terms of the amount of noise they produce. The best battery powered weed eater should produce the least amount of noise. This should be the same no matter the mode of operation whether in Eco or full throttle modes.

The lithium-ion battery-powered string trimmers produce the lowest noise levels. This enables you to go about your work early in the morning or late at night whenever it is most convenient for you.  The neighbors will not complain of any disturbance as the only noise produced is that of grass being whacked. Check the decibels ratings of the trimmer before you buy it.


As you tend to your lawn, you need the least weight possible from the trimmer to get more work done in a day. The low weight should not sacrifice on the power you need. The weed eater should, therefore, be easy to carry around the lawn.

Besides being lightweight, the trimmer should be strong. Slight knocks and bumps should not damage it. Again, lithium-ion batteries will be lighter than cadmium batteries.


The best battery powered weed eater should have the provision of being customizable to your specific needs. The handle and heights should be adjustable to positions where it is most comfortable for your use.

An uncomfortable handle can be really tiresome when you are out there in the sun. A shorter or longer handle makes the tool too difficult to use. It may be quiet or very powerful, but if it causes you pain when using it, then it is not worth it.

String feeding system

The ease of feeding a new line to your trimmer is what makes it the best battery powered weed eater. This reduces time wastages when you need to introduce a new line of cutting. Different trimmers have varying feeding systems.

There are those with the bump loading strings. When you need more cutting lines, you bump the head of the trimmer on the ground. This releases more line. Then there is the automatic string loading, which continuously replenishes the line when need be.

Additional features

Any trimmer will be able to clean up any lawn; some have additional features for a professional look in your yard. Weed eaters with straight shafts and a rolling feature enable you to give the lawn a neater edge. You simply roll it along the edge as it trims the grass.

Varying the speed of the trimmer should also be a feature to look for. A variable speed trigger allows you to conserve power when trimming on light grass. You then increase the speed on denser patches of weed and grass.

Best battery powered weed eater reviews

DEWALT String Trimmer

DEWALT DCST920P1  20V MAX 5.0 Ah Lithium Ion XR Brushless String Trimmer

The DEWALT string trimmer provides you with a precise power control. Its 20V MAX Lithium Ion XR battery has a variable speed trigger that allows for better power management. The Hi/Lo control switch optimizes running time and performance. This trimmer has a brushless motor that maximizes the durability and efficiency of the motor.

A feature to look forward to is its patented gear drive which provides you with more torque to maintain the high cutting speed even when under load. A 0.080-inch cutting line has a bump feed system where you bump the head on the ground to feed in more lines. The cutting line clears up to 13 inches of grass patch at a time.

Since you will be carrying this weed wacker around for some time, it weighs just 8.5 pounds. It will not weigh you down. The trimmer is well balanced and is very easy to maneuver. This puts very minimal pressure and stress in your hands as you trim your lawn. The packaging includes the trimmer, the 20V Lithium Battery, charger, handle, guard and line wound in a spool.

This weed eater is powerful enough to whack through tough weed overgrowths. With no spark plugs, carburetors and air filters, this tool is very easy to maintain. This is not to mention the absolute ease of starting. It starts and stops as soon as you pull the trigger.


  • Very quiet
  • No fumes
  • Easy to maintain
  • Easy to start
  • Lightweight
  • Well balanced


  • Goes faulty after some time

BLACK+DECKER String Trimmer

BLACK+DECKER LSTE525 20V MAX Lithium Easy Feed String Trimmer/Edger with 2 Batteries

The BLACK + DECKER string trimmer is driven by 2, 20V MAX Lithium battery. This delivers enough power to trim overgrowths on your lawn and give smooth edges to your sidewalks and flower bed edges. Its power drive transmission increases the amount of torque available for cutting purposes.

A 2-speed control provides for a choice between using more power or having extended running times. This trimmer gives you a level of versatility since it can convert to a wheeled edger for more refined finishes to your lawn. The easy-feed system allows you to extend more line with just the push of a button. The much inconvenient bump feed is eliminated.

A stress-free handling of the tools provides for extended running periods. This is made possible by the soft grip premium handle. For ideal use, this tool allows you to customize the height and handle. You can set these at positions at which you are most comfortable.

The cutting line is 0.065 inches in diameter and has a swath diameter of 12 inches. The trimmer, 2 lithium batteries, 1 charger, a spool and 1 guard are included in the packaging.


  • Converts to a wheeled edger
  • Has 2 batteries
  • Easy feed
  • 2 speed control
  • Comfortable handle
  • Lightweight
  • Easy to operate


  • Malfunctions after sometime
  • Light duty

WORX String Trimmer

WORX 32-Volt GT2.0 String Trimmer/Edger/Mini-Mower with Tilting Head and Single Line Feed

A 32-volt Lithium Max battery powers the WORK String trimmer. This battery delivers enough power for a new level in grass trimming and edging. It transforms into some sort of a mini mower. The 32-volt battery provides longer runs and more power so that you finish your work quickly. Combine this with a 12-inch cutting diameter, and you get a tool which finishes your work in no time.

This weed eater is easily convertible to an edger with its dual positioned wheels. These wheels can also convert it to a mower like trimmer. This produces brilliant finishes in hard to reach places.

This versatile tool is very easy to use by anyone, male or female. The head can tilt up to 900 to allow the trimming of those hard to reach spots. The head remains supported by the wheels. This tool is equipped with a 100% single line feed. There is no bumping of the head when you need to extend the line.

In an added advantage, this trimmer can protect your decorations and garden. It features a spacer that is adjustable to protect your flowers, plants and garden furniture from damage by the cutting string. The spacer guard ensures you do not accidentally cut where you were not supposed to.


  • Has a spacer guard
  • Lightweight
  • Easy to use
  • Very versatile
  • Short charging time
  • Long lasting battery


  • Unsuitable for big yards

BLACK+DECKER 40V String Trimmer

BLACK+DECKER LST136W 40V MAX Lithium Ion String Trimmer, 13"

The BLACK + DECKER 40V String has been designed to offer convenient cutting efficiency while eliminating the need for electric codes. The 40 V battery powers a motor which in turn propels the cutting line, allowing you to get the job done faster. Its exclusive PowerDrive Transmission transmits motor power efficiently.

This trimmer allows you to trim those hard to reach spots and gives a neat edging finish along the hard surfaces. The 40 V MAX lithium-ion battery offers excellent power, longer runtime and is compatible with other tools within the BLACK + DECKER range of products. The automatic feeding system ensures you work continuously without having to stop to bump for more lines.

This trimmer is fitted with a PowerCommand dial that lets you choose between two power modes. These are maximum power and maximum runtime power modes. You can use maximum runtime mode when trimming on patches with less dense weed growth. This weed eater is versatile and can be used as an edger for your lawns.

An adjustable handle and height provide you with utmost comfort when using the tool. When you buy this tool, you get a fast charger that completely recharges the battery in about 1 hour.


  • Very powerful
  • Ergonomic design
  • Long lasting battery
  • Easy to use
  • Fast charger
  • Versatile


  • Tends to break down after some time

GreenWorks Cordless String Trimmer

Greenworks 40V Cordless String Trimmer & Blower Combo Pack STBA40B210

The GreenWorks Cordless string trimmer is a 12 inches trimmer which has a motor that is positioned at the front for optimum tool balance. It is lightweight and very easy to use. The variable speed control trigger allows you to choose the power output you need. A 0.065-inch diameter cutting line is automatically advanced when need be.

This product is absolutely a breeze to use. There are no gas fumes to contend with, there is no pulling of cords when starting it and is easy to maintain (it actually requires no maintenance). With reduced noise levels of up to 50%, you can use this tool at any time without inconveniencing your neighbors.


  • Lightweight
  • No gas fumes
  • No maintenance required
  • Instant start/stop
  • Less vibration and noise
  • A versatile battery


  • Costly

BLACK+DECKER LCC140 String Trimmer

A 40V MAX Lithium-ion battery powers the BLACK + DECKER LCC140 string trimmer and includes an indicator which shows the level of charge in the battery. This battery provides a longer lifespan for prolonged lawn care.

If you need to edge your sidewalks and pathways, this trimmer will easily convert to an edger, for that amazing manicured look. With a 13-inch cutting swath, you can carry out the work faster. Its efficient PowerDrive transmits all the power to the cutting line for more trimming power.

This trimmer features a PowerCommand dial that is used to toggle between maximized battery runtime on lighter grass patches and maximum power to whack through thick weeds. An automatic feed spool eliminates the need for bumping of the trimmer to advance more cutting line.

The packaging also includes a lightweight sweeper for an all-around lawn care. The sweeper also produces low noise to keep the neighbors at bay and has a soft grip handle for more comfort when going about your work.


  • A sweeper is included
  • PowerDrive Transmission
  • Converts to an edger
  • Automatic Feed Spool
  • Variable power control


  • Costly if you do not need the sweeper

BLACK+DECKER 12-Inch Trimmer

BLACK+DECKER LST300 20V Lithium Trimmer/Edger, 12"

The Black + Decker 12-inch trimmer features a PowerDrive transmission system which ensures that most of the power produced by the power is transferred to the cutting line. With its 20V lithium battery, you get 33% more running time to complete your work.

This device is a 2 in 1 lawn tool. It converts from a trimmer to an edger within seconds. An automatic feeding spool delivers more cutting line as soon as the one running wears out. Time wastages to bump the feed are eliminated.

This tool is lightweight and consists of an adjustable handle and height for customizable operation. The shaft can also be extended to reach under lawn furniture and maneuver around obstacles.


  • Lightweight
  • 2 in 1
  • Efficient power transfer
  • Compact
  • Works great


  • Does not hold power for long

WORX Cordless Grass Trimmer

WORX WG163 GT 3.0 20V Cordless Grass Trimmer/Edger with Command Feed, 12", 2 Batteries and Charger Included

The WORK Cordless Grass Trimmer has a 20 Volt Max Lithium battery that powers it through any type of grass with precision. This battery delivers enough power and sustains the weed eater for a considerable amount of time. This tool easily turns to an edger supported on wheels for a neater finish for your lawns.

An innovative Command FeedTM instantly feeds more cutting line on command. This keeps you predictive most of the time. The work is therefore completed faster. The trimmer features a telescopic shaft for adjusting the working height. The trimmer head is converted to an edger with the turning of the lock.

This weed eater’s battery ensures longer running hours, weighs less, does not self-discharge and charges quickly so that you get back to work in a breeze. The trimmer head is fitted with a spacer guard that protects your other plants such as flowers. The handle of this weed eater gives you total control over the trimmer with its 7 lock adjustments.


  • Converts to a mini mower
  • Has an edger guide
  • Adjustable handle and height
  • Fast charging battery
  • Automated cutting line feed
  • Lightweight


  • Not powerful enough

GreenWorks 13-Inch Cordless String Trimmer

Greenworks 13-Inch 40V Cordless String Trimmer, 2.0 AH Battery Included 21302

The GreenWorks 13-inch cordless string trimmer could be just the electric weed eater that you need for your lawn. 40 volts, 2 Amp hour Gmax battery powers it. This gives a gas free and cordless lawn care experience.

It gets the job done almost as a gasoline powered weed eater would. This trimmer is lightweight, can be relied upon and has easy to push buttons that will not wear you out. This trimmer is fitted with a pivoting head which is supported by wheels for smoothing of lawn edges.

The head can also be positioned at three points for ease of work. Noise and vibrations is your greatest enemy when using any trimmer. With this machine, you do not have to worry about either. Its electric start is instant with no pull cords.

The 0.065-inch single has an auto feed system for efficient workings. The charging times for the battery depend on the settings you are using as well as the running time.


  • Less noise and vibration
  • Instant electric start
  • Lightweight
  • Easy to use
  • 3 position pivoting head
  • Edging wheel
  • Line auto feed


  • Not suited for large yards

DEWALT 40V String Trimmer

DEWALT DCST990H1  40V MAX 6.0 Ah Lithium Ion XR String Trimmer

The Dewalt 40V string trimmer features a 40 volts Max XR battery. This is a high premium capacity, 6 Ah battery with almost 50% more capacity than ordinary batteries. The brushless motor gives more runtime at increased efficiencies. The patented gear drive provides increased torques while maintaining the high cutting speeds even under loads.

The drive is housed in a metal gear case to ensure durability even when under heavy uses. The housing is impact resistant and is made of Xenoy to maximize the durability of the trimmer. Precise speed control allows you to use the speed that you need to tackle the weed growths. The auxiliary handle is padded for that extra comfort while using the trimmer.

A dual 0.080 inches cutting line with a bump feed gives you control over how much of it is fed at any time. With a larger cutting swath diameter of 15 inches, this trimmer helps you complete the work faster than most of the trimmers.


  • Larger cutting swath diameter
  • Impact resistant housing
  • Less maintenance
  • Low noise and vibration levels
  • Instant stop/start
  • Powerful battery


  • Costly


BLACK+DECKER LST136W 40V MAX Lithium Ion String Trimmer, 13"

The BLACK+DECKER 40V String Trimmer tops our weed eater reviews because of its unrivalled performance when it comes to cleaning up your lawn. It allows you to choose just the right amount of power that befits the kind of work and thickness of the grass you are working on. Speeds of 8500 rpm tackle thick weeds while 6500 rpm increases the battery runtime.

Its cutting head can be rotated to 1800 so that you can transform from trimming to edging. Its Automatic Feed Spool uses centrifugal force to advance more line when you need it. You do not have to bump the head. The auxiliary handle has a quick release for adjusting it to your specific needs.

The 40-volt lithium ion battery delivers exceptional power. It is also compatible with any of Deckers’ 40-volt systems. You can use it for the sweeper vacuum, hedge trimmer and as a blower. It can be charged from any power outlet in your garage.