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The Best Battery Powered Weed Eater To Buy in 2021 – Reviewed

It’s amazing how far battery powered weed eaters have come in a short few years.

No longer considered a toy, these tools are a great choice for homeowners that are looking for a good mix of convenience, ease-of-use and reasonable power.  Advances in lithium-ion battery technology have been pushed primarily by electric car manufacturers, but it’s trickled down to less expensive products.  That’s great news for homeowners.

Maybe you looked at cordless weed wackers in the past, and thought they weren’t powerful enough.  If so, it’s time to take a second look.

This guide will help you determine if a battery powered weed eater is right for you. We lay out all the pros and cons and describe what features you need to look for when buying a weed wacker. We also have a list of the best battery powered trimmers on the market to make your buying decision even easier.

Jump To Recommendations
Our selection criteria and expanded reviews are below, but we know you might be in a hurry. If so, here’s our recommendation by use case:

Prices and availability are accurate as of 2021-05-11 at 18:04 CST - Details

There Are Solid Reasons For Going Cordless

There are a lot of reasons as to why a consumer would choose a cordless battery powered weed eater. Here are the main benefits of the class:

  • Mobility: Cordless weed eaters are light and have no cords. Without the cord, you are free to move about your yard while working.
  • Easy to Use: To start a battery powered weed eater, you simply pop a battery in and push a button. There’s no need to mix gas or kill your shoulder with a pull start.
  • Quiet: Aside from the trimmer heads whirling at high RPM, there is virtually no noise from these devices.  Your neighbors will appreciate the lack of noise pollution.
  • Environment: Battery powered trimmers emit no pollutants making them a very eco-friendly tool.
  • Cost Effective: The best battery powered weed eater can cost less upfront than gas, and still provide plenty of power.

There are two main reasons why you might go with gas models or corded electric for your power supply. They don’t apply to most people, but if either apply to you try our other guides:

  • Really Thick Weed Growth: If you have many weeds that are thicker than a grown man’s thumb, you’ll need a thicker line than most cordless whackers can handle.  Gas will probably be your best choice.  This is usually a problem if you live next to open fields of weeds.
  • An Estate-Sized Yard Area: If you need to take care of tens of acres of land, it’ll probably be more convenient to just buy a gas-powered weed eater.  You’re more likely to have large weeds, and you’ll have to swap out batteries a few times – and then manage recharging with a cordless string trimmer.   The current state of battery capacity isn’t enough to run a battery powered string trimmer over that size of property.

Selecting the best weedeater among the plethora of options available in the market may be a daunting task. To simplify things for you, we have reviewed some of the best products for your convenience.

Our Picks For The Best Battery Powered Weed Eaters

Our Top Pick: The Black + Decker 40V Lithium Ion Battery Powered String Trimmer
  • High-performance 40V max Lithium ion Battery with state of charge indicator that shows remaining power
  • Power drive high-torque transmission gives you cutting power at the string for clean, fast cuts
  • Automatic feed Spool - afs which automatically feeds trimmer line as needed with no bumping
  • Converts from trimmer to edger in seconds

Prices and availability are accurate as of 2021-05-11 at 18:04 CST - Details

The Black+Decker 40-Volt weed eater is a great fit for most urban and suburban yards. It’s the string trimmer I have for my home – my lakeside yard is pretty small but I do have quite a few areas where I need to knock down weed growth.

It’s the perfect fit for your home if you don’t encounter weeds thicker than 3/4″ wide.  If you have weeds that big –  the string that comes on the spool is too small to handle those vegetative beasts.

It’s lightweight at just under 8 pounds so it won’t tire you out as quickly as some heavier weed wackers.

Not just a trimmer, this multipurpose garden tool can also serve as an edger. It takes under 30 seconds to transform your eater into an edger.  You now can easily edge along your patio or walkway.  I don’t use this feature that much, but it is handy to have for those times I need it.

40-Volt Max Lithium Ion Battery

Black + Decker has an entire line of power tools that run off the 40-volt MAX system.  That means you can buy various tools that use these batteries and use them interchangeably. While not at the top end of the range for battery size, it has been good enough for my needs.   I went whole-hog, and bought both the leaf blower and lawn mower that use these batteries.

I haven’t been disappointed – with battery life or power.

I’ve found that I can get around 50 mins of usage on average from my trimmer on one charge of the lithium-ion batteries. It depends what setting I have my speed trigger at, but I usually keep it at a three out of five.  That run time compares to 15- 20 mins of mower time.  If I didn’t have two batteries already, I’d probably order another one when I bought the trimmer just for convenience sake.  It’s nice to have a battery charging while one is being used in your cordless string trimmer.

I’ve found my 2 amp batteries take between 1.5-2.5 hrs to recharge.  The time depends on how hot the battery is (was it just used or sitting around), and the temperature in my garage where my charger is located.  Heat isn’t your friend when dealing with lithium-ion recharging.

Automatic Line Feed Spool

This is another excellent feature and can prove to be a big time-saver. In theory, this will allow you to work continuously and there is no need for manually adjusting the spool. In practice, it works most of the time.  I’ve still found myself occasionally needing to bump feed some string on my own.

Adjustable Height and Handle

The height of the handle of the string trimmer can be customized depending on the length that is preferred. This means that whether you are short or average height, you can expect that the shaft will be right for your needs.  An easy to open and close clasp requires means you need no tools to adjust to the perfect height.

I’m 6’2″ – and it’s comfortable enough to use for my lot size.  I’d likely go for a bigger model if I had an acre or more to de-weed.

PowerDrive Transmission

This is an innovative powertrain feature that is found in most of the string trimmers from Black & Decker.  The manufacturer claims it provides the cutting string with more force than their previous transmission models.  I didn’t own a previous model so I don’t know if that’s true, but it seems plenty powerful for my needs. This doesn’t come at the expense of mobility or longevity.   With this battery-powered trimmer, you’ll be able to move about the yard controlling weeds for 45 minutes+ per battery charge.

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The Best High End Rechargeable Weed Eater - The DeWALT Flexvolt 60V Max

  • Get the POWER of gas in a battery powered weed eater!
  • Cuts 15 inches of weeds at one pass- saving you time when weed wacking.
  • Make your life easier - avoid time-killing maintenance like replacing spark plugs, air filters or carburetors.
  • DeWalt is a brand you know and trust for quality.

Prices and availability are accurate as of 2021-05-11 at 18:04 CST - Details

This DeWALT string trimmer is a PERFORMANCE BEAST.  It’s the right choice if you like having the best and don’t mind paying for it.

It’s all in the stats: A voltage of 60V.  9AH.  A 15 inch cutting swath.  With performance qualities like this, it’s as close to a gas replacement for pure power as there is on the market.

It accepts larger string sizes than any of the other trimmers we spoke about earlier.  So if you do live in the weeds, this is a great choice.  With enough batteries, you can tackle almost any sized yard.  It is heavier (some people have pleaded for a shoulder-strap to help with the load) but that’s the be expected with the bigger motor and battery.

Of course, it’s more expensive.  But at least you’re getting quality for the money.  DeWALT is a well-known brand with a quality manufacturer reputation.

In my opinion – it’s overkill for most people at this price.  But if you have a specific need for this much power and the budget to buy it, it’s a great choice.

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Best Pick For Urban Yards: Worx G2.0
  • 3-in-1 function with dual-position wheels for grass trimming, edging and mowing
  • Converts from a trimmer to an in-line edger in seconds with no tools
  • 6 pack of 10-foot each helix design copolymer nylon resin and synthetic trimmer/edger line
  • Pliable and flexible allowing for the line to stretch and cushion on impact with hard surfaces

Prices and availability are accurate as of 2021-05-11 at 18:04 CST - Details

This weed wacker is a great choice for people who have small yards and don’t want a separate lawnmower.  This tool not only converts into an edger, but also into a small mower.  It’s not for everyone, but it is a great choice for the right homeowner.

12-inch Cutting Diameter with Wheels

This isn’t the widest trimmer out there, but the wheels do make it possible to use it as a mini-mower.  Of course, you don’t have to use the wheels, but it’s a nice feature for those who are afraid they will tire holding the trimmer.  There are many reviews that indicate people do use this as a replacement for their mower so if storage space is an issue you should consider this tool.

32-volt Max Lithium Battery

Dependable power even on the go – this is one thing that you can expect from this product. Since it is battery-powered, you can work anywhere. There is no need to have a source of electricity near you. Also, because it is cordless, you can easily move as you use this product.

Quick Release Lever

One thing that makes this a versatile choice is the adjustable height. Simply release the lever and in an instant, you can increase or decrease the length of the shaft. This will allow you to have it customized depending on the requirements of a specific task.


It is also a good thing that the string trimmer is lightweight. Even if you will need to hold it for a long time, there should be no problem. It is not as exhausting as most of its heavier counterparts.

Overall, Worx 32-volt G2.0 String Trimmer is a good pick because it’s a triple threat.  For the right consumer, this product is a great buy.  The Black+Decker above is a better choice for people without a need for the mini-mower functionality.

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Solid Choice For 1-2 Acres - The Greenworks 21362
  • Attachment capable, accepts most gas attachments to provide mulitple use
  • Brushless motor delivers greater torque, quieter operation and higher battery efficiency
  • Starts within seconds with gas comparable performance, battery compatible with multiple tools
  • Battery and Charger include. Compatible with battery models 29462 and 29472 and charger 29482

Prices and availability are accurate as of 2021-05-11 at 18:04 CST - Details

This weed eater is built for larger yards.  The battery is bigger than most and the motor delivers more power.  The trimming cut is larger than average.  While that means it’s a few pounds heavier and harder to handle, if you need to cover a good-sized yard the Greenworks 21362 is a good choice for you.  This is the pick for power-hungry yards.

4AH Battery

This is a big battery.  Most other brands come with 2.0AH batteries, so it’s a decent step up in power storage over the competition. When it is fully-charged, it can power the unit for over an hour. On the other hand, when the battery is drained, charging it will take only approximately 120 minutes.  It does add to the weight, which is why this product weighs in around 12 pounds.

Instant Electric Start

In the case of the traditional string trimmers, effort will be required in pulling the string to launch the unit. In the case of this model, such is not one thing that you have to do. You can simply push a button, and in an instant, the unit will be ready to work.

DigiPro Brushless Motor

The design and power of the motor is also commendable. It is created in such a way that it will deliver powerful performance that is comparable to those that are powered by gas. However, it is different in the sense that this product operates without emissions and with minimal noise.

14-inch Cutting Path

Another thing that makes this a remarkable product is the diameter of its cutting radius. This simply means that you will be able to do more within a single pass. You do not need to wait for a long time before you are done with trimming.

Not everyone needs this much power – but if you think your yard might, it’s a solid choice.

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Best For Value Buyers: B+D 20 Volt Combo
  • Sweeper is ideal for clearing driveways, sidewalks, decks, garages
  • String trimmer features automatic feed spool; No bumping required
  • Lightweight design, low noise levels
  • (2) 20 volt max Lithium Ion 1.5Ah batteries. Nominal voltage is 18

The real selling point is the bundling of the leaf blower in this purchase.  Neither tool will break power records, and using 20V batteries isn’t future-proofing yourself in this day and age.  But it’s cheap, and both products will get the job done.  Considering you get both a blower and a weed eater for almost half the price of some other trimmers alone, it’s definitely a good value.  It’s so inexpensive that if I bought this package, I’d probably spend some of the savings on the extended warranty just for piece of mind.

20-volt Max Lithium Ion Battery

20 volt batteries are in the twilight of their product cycle.  They work, but 40V and higher batteries have entered the mainstream.  Still, this bundle is cheap.

Runtime Extension Technology

It comes with a dual mode accelerator switch. This allows you to move up and down the motor speed so you can conserve battery juice when it’s not needed. All B+D weed whackers tend to have this feature.

2-in-1 Functionality + A Blower

Look, you get another tool for the shed when you buy this combo.  Plus the trimmer can also be an edger, just like most B+D products.  You won’t set any world land records using these yard products, but they will get the job done.

Indeed, Black+Decker LCC420 String Trimmer has what it takes to be ranked as one of the best within the product category. It has an exceptional battery that holds charge for a long time. It also has excellent transmission for better cutting power, even in tough applications. It is also a plus that it has a lightweight body, which makes it easy to use.

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Overview of Battery Powered Weed Eater


Depending on what your specific needs are, a cordless battery powered weed eater generally can fulfill it. They are easy to use, reliable and powerful. Much like battery-powered leaf blowers, the technology has come a long way. Nowadays they are almost the same as a gas powered one. Even if you have a larger yard, the battery life in the string trimmers reviewed above will be long enough to get through an average sized yard. For the price, you really can’t beat the value with what you get.

Prices and availability are accurate as of 2021-05-11 at 18:04 CST - Details

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35 Responses

  1. Thank you for the reviews. I am going to sell my Wolff and will consider looking at battery powered ones. I need something which is lightweight and cordless so that I can move around the garden with ease.

  2. Weed eaters are essential for keeping and maintaining lawn properly. Good info regarding battery weed eater. Very nice to know that technology has updated the usage and function.

  3. It’s good to know for the summer of next year that this small battery weeder will do the job when everything in the garden is running wild, and you are planning an event outside and want everything to look perfect.

    This looks like it will do the job.

  4. I believe my neighbor has one of the Black & Decker trimmer/sweeper type of weed eaters. We live in swamp/forest land, and it is important to have a nice swift trimmer talked about in this article.

  5. This is a very detailed review that helped me know more about weed eaters. The benefits of the battery powered weed eaters are remarkable. These technological innovations can really help and improve human life. This review could persuade people in buying these equipment for lawn maintenance. Thank you for reviewing!

  6. Weed eater makes lawn works so much easier. Despite its limited time to be used, weed eater is still more convenient. Anyway, it can make your work faster than the usual, so there’s no need for a very long time to trim your lawn.

    1. It definitely need something to make my yard work much easier. My neighbor got one so I need to get one too seeing how much easier I see them getting their work done.

  7. I often find yardwork to be a pain, but tools that make it easier are definitely welcome. This one seems like it could make it fun. Thanks for this!

  8. Weed eaters are a very important tool for those with lawns or backyards in their house. But cordless weed eaters? WOW. I like the product. As said above, cordless is much more convenient. I won’t have to look back and check how much cord I have left to go forward. It is much more mobile and I think safe. Because maybe if you have pets like dogs or cats and they are running around they might not see the cord and trip over it and this might even happen with children.

  9. Very comprehensive battery weed eater reviews! I am looking to buy my hubby one for his B-day and you have made it super easy for me to do all my research in one place, thanks!

  10. I really appreciate this review. It highlights some details about weed eaters that I never really considered. I will be purchasing one in the coming weeks and will revisit your site to do so. Thanks!

  11. OOH my husband would LOVE this site he is a yard maniac! lol … I think I will surprise him with that WORX GT 2.0! That looks just like his style.

  12. Excellent review, much appreciated! I think I’ll be checking out the Black & Decker MTC220 in-store. I love the 3-in-1 feature.

  13. I have to admit I like the diversity of tools now days. My weed eater is so old that I was hauling around a cord. Yes, it is time for a new weed eater. I really like how they can be converted from one tool to another.

  14. I like that the battery last a little longer than what I was use to. I like the mobility possibilities that a battery offers. The interchangeable accessories are a bonus as well. One tool for many jobs makes life easier.

  15. My grandpa definitely needs one of this weed eater things. His farm is full of weed; I think the Black & Decker LCC420 String Trimmer is the best one. Thanks for the article.

  16. “Depending on what your specific needs are, a battery power weed eater will fit almost every need. ”
    I feel that the specific needs for most people using the battery power eater is for the lawn nutrition.
    In Canada, we are not for our own good lawn; and Government helped us to collect our Used battery for recycling

  17. I really like the fact that are lightweight and environmentally friendly, but too bad the batter powers fizzes out quick. I will have to weigh the pros & cons.

  18. So these battery powered weedeaters help clean our yards, beautify nature and they’re environmentally friendly? Sounds like a no-brainer to me. I’m gettin mine!

  19. Not a bad price on Amazon… just a bit over a bill. I thought it would cost much more with all the features and all. But surprisingly it’s very affordable!

    1. WORX is good but not perfect, if you still want to get one, you can go with WORX WG175. However, from my perspective, I suggest you buy the Black and Decker LST136W.

  20. Actually, I am going to buy the B&D LST420. It’s on ale at True Value for $69.99-Grat price. Thanks

  21. Black and Decker lithium 20v battery for weed eater and blower does not last long at all… on a full charge the longest it’s lasted is 18 minutes and I’ve had it less than a month! But it is super light and easy to use!

  22. I have purchased two of the Black and Decker combo kits over the last ten years with the same result. Eighteen minutes of use after a 12 hour charge. My latest one only lasts ten minutes. No acknowledgement from Black and Decker. Won’t be buying a third set.

    1. Have you tried BLACK+DECKER LST136W? I believe that is the best cordless battery powered weed eater, you can read the review here.

  23. I have had an Echo gas powered trimmer for more than 15 years. Highly reliable, but a bit heavy. I am now 77 years old and need something lighter. So I bought a Worx 56v trimmer and have added a 56v Worx blower. I replaced a Toro corded blower, also reliable, but a little difficult to move around with the cord. I have a full two acres to maintain. Both tools weigh about 8 pounds. My day in the yard is made easier by these two great, powerful tools. The same battery can be used in both tools.

  24. I’m looking for a battery trimmer/edger that is easy to replace the line. My husband has arthritis in his hands and finds it difficult to squeeze the hub to remove and replace the line. Any suggestions?

      1. EGO now has the Rapid Reload Head which makes it super easy and fast to reload. Simply push the line through the head and twist the head and it winds the line in!

  25. We’re thinking we might prefer a blade weed trimmer.
    Do you know of any good battery BLADE rather than chord weed trimmers?
    Would also appreciate your thoughts on a blade vs. the chord.
    Thanks, Valorie

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