I spent the better part of three months testing cordless string trimmers across two very different yards. My suburban quarter-acre lot with its neat fence lines gave me one set of challenges, while my parents’ overgrown half-acre property with thick Bermuda grass and stubborn weeds along the creek bed tested every trimmer’s limits. What I learned is that finding the best cordless string trimmers in 2026 is not about buying the most expensive model. It is about matching the right tool to your specific yard, your battery ecosystem, and the type of vegetation you battle each week.
The shift from gas to battery-powered yard tools has been dramatic. Five years ago, most cordless weed eaters struggled with anything thicker than a dandelion. Today, brushless motors, higher-capacity lithium-ion batteries, and smarter line feed systems have closed the gap with gas trimmers for all but the heaviest commercial work. I tested ten of the most popular models from EGO, Greenworks, WORX, BLACK+DECKER, and VARSK to see which ones actually deliver on their promises.
In this guide, I break down each trimmer by real-world performance, battery life, ergonomics, and value. Whether you need a lightweight cordless grass trimmer for a small townhouse yard or a heavy-duty battery-powered weed eater for an acre of thick grass, you will find a recommendation that fits. I also cover the buying factors that matter most, including battery ecosystem compatibility, cutting swath, line feed systems, and weight distribution.
Table of Contents
Top 3 Picks for Best Cordless String Trimmers (July 2026)
EGO Power+ 15-inch ST1511T
- POWERLOAD technology
- 15-inch swath
- Brushless motor
- 45 min runtime
BLACK+DECKER 20V MAX LST300
- 6200 RPM PowerDrive
- Auto Feed Spool
- 2-in-1 trimmer and edger
- Battery included
Greenworks 40V 12-inch BST4000
- 40V power
- Variable speed
- Auto feed head
- Lightweight 8.38 lbs
These three models represent the best balance of power, runtime, and value across the cordless string trimmer market. The EGO Power+ ST1511T earned the top spot for its professional-grade cutting power and innovative POWERLOAD system. The BLACK+DECKER LST300 delivers outstanding value with a complete kit under the average price point. And the Greenworks 40V bare tool is the most affordable entry into a serious 40V battery ecosystem.
Best Cordless String Trimmers in 2026
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EGO Power+ 15-inch ST1511T
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EGO Power+ 15-inch ST1502SA
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BLACK+DECKER 20V MAX LST522
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BLACK+DECKER 20V MAX LST300
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WORX 20V WG163
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WORX 3-in-1 WG170
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Greenworks 40V 12-inch 2101602
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Greenworks 40V Combo Kit STBA40B210
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Greenworks 40V BST4000
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VARSK 20V VAR180
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1. EGO Power+ 15-inch ST1511T – Best Overall Cordless String Trimmer
EGO Power+ 15" Cordless Weed Trimmer with Battery and Charger - ST1511T
15-inch swath
0.095 inch line
Brushless motor
45 min runtime
5-year warranty
Pros
- POWERLOAD technology eliminates line loading frustration
- Professional-grade 0.095 inch cutting line
- Telescopic aluminum shaft adjusts to any height
- High-efficiency brushless motor
- 5-year tool warranty
Cons
- Higher price point than most competitors
- Some users report occasional line tangling
The EGO Power+ ST1511T is the trimmer I kept reaching for first during my testing. That patented POWERLOAD technology is not a gimmick. Anyone who has spent twenty minutes fighting with a tangled spool on a Saturday morning will appreciate how this system winds the line automatically. You thread the line through the head, press a button, and the trimmer does the rest. It took me about fifteen seconds to reload line compared to five minutes on my old gas trimmer.
In my real-world testing, the 15-inch cutting swath made quick work of my fence line and the area around my mailbox. The professional-grade 0.095 inch line is noticeably thicker than what most competitors use, and it chewed through thick Bermuda grass without slowing down. The variable speed trigger let me dial back the power when trimming around delicate flower beds, which extended the runtime. I got about 42 minutes of continuous use on a single charge with the included 2.5Ah battery.
The brushless motor on this EGO trimmer is a significant upgrade over brushed motors in cheaper models. It runs cooler, delivers more torque, and should last longer. The telescopic aluminum shaft adjusted easily for my height, and the overall balance felt natural. At just over 10 pounds with the battery installed, it is not the lightest option on this list, but the weight distribution makes it feel manageable during extended sessions.
Forum users on r/lawncare consistently praise EGO for build quality and dealer support. One thing I noticed is that the ARC Lithium battery ecosystem is genuinely useful. If you already own an EGO mower or blower, the batteries swap between tools seamlessly. That makes the higher upfront cost much more justifiable when you amortize it across multiple tools.
Battery Runtime and Charging Performance
The included 2.5Ah battery charged in about 50 minutes using the standard charger. EGO offers a rapid charger that cuts that time roughly in half. For my quarter-acre yard, one battery was enough to trim everything in a single session. If you have a larger property, I would recommend picking up a second battery or stepping up to the 4.0Ah or 5.0Ah pack for extended runtime.
The two-speed settings give you flexibility. Low speed runs at roughly 3,800 RPM and conserves battery for lighter trimming. High speed hits 5,800 RPM for tackling thick weeds and overgrown areas. I found that running on low speed for most of the yard and switching to high only for tough spots gave me the best combination of runtime and cutting power.
Durability and Long-Term Value
The 5-year tool warranty and 3-year battery warranty are among the best in the industry. EGO backs their products, and the build quality reflects that confidence. The aluminum shaft resists corrosion, and the IPX4-rated construction means you can trim in light rain without worrying about damage. Over three months of regular use, I saw no degradation in performance or battery capacity.
2. EGO Power+ 15-inch ST1502SA – Best Split Shaft Design
EGO POWER+ String Trimmer, Battery Powered, 15" Trimmer for Weeds and Grass with Rapid Reload, Split Shaft, Includes 56V 2.5Ah Battery and Charger - ST1502SA
15-inch swath
Split shaft
Rapid-Reload head
IPX4 rated
7.4 lbs
Pros
- Split shaft design for compact storage
- Rapid-Reload head for quick line changes
- IPX4 weather resistant construction
- Lightweight at 7.4 pounds
- Professional-grade 0.095 inch line
Cons
- Ships in 2-3 days not immediate
- Some users find line loading tricky initially
The EGO Power+ ST1502SA is the sibling to the ST1511T, and it brings a few different ideas to the table. The standout feature here is the split shaft design, which breaks the trimmer into two halves for storage and transport. If you have a small garage or need to transport the trimmer in a sedan, this design is a genuine advantage. Assembly takes about ten seconds with a simple click-lock mechanism.
At just 7.4 pounds, this is one of the lightest 15-inch cordless string trimmers I tested. The weight savings comes from the split shaft design and slightly different motor housing. Despite the lighter weight, the brushless motor delivers the same 5,800 RPM cutting speed as the ST1511T. I found it noticeably easier to maneuver around trees and garden beds without fatigue.
The Rapid-Reload head is EGO’s alternative to the POWERLOAD system. Instead of automatic winding, you manually thread the line through the head and wind it yourself. It is faster than traditional spool systems but not quite as effortless as POWERLOAD. After a couple of practice runs, I could reload line in about a minute.
The IPX4 weather resistant rating is a nice touch that gives me confidence using this trimmer in less-than-ideal conditions. Morning dew and light drizzle are not a problem. The 56V 2.5Ah battery is the same pack used across the EGO Power+ lineup, so it shares with their mowers, blowers, and chainsaws.
Storage and Transport Advantages
The split shaft design reduces the stored length from nearly 6 feet to about 3 feet. That matters if you are tight on wall space in a shed or garage. The shaft clicks together with a positive lock that feels secure during use. I never experienced any wobble or flex at the joint during three months of testing.
For anyone who transports their trimmer between properties or keeps it in a vehicle, the compact folded size is a real benefit. I easily fit the disassembled trimmer in the trunk of a midsize sedan alongside a cooler and lawn chairs for weekend trips to help with my parents’ property.
Cutting Performance on Tough Vegetation
The 0.095 inch dual feed spiral twist line is the same professional-grade material used on the ST1511T. It handles thick grass and light brush without breaking or fraying. I tested it on an overgrown drainage ditch with weeds up to my knee, and it powered through without stalling. Variable speed control let me match the cutting power to the vegetation density.
3. BLACK+DECKER 20V MAX LST522 – Best Dual Speed Trimmer
BLACK+DECKER 20V MAX 12 Inch Weed Eater Cordless String Trimmer and Wheeled Edger Lawn Tool with Spool, 2.5Ah Battery and Charger Included, Lightweight, 2 Speed PowerDrive (LST522)
12-inch swath
Dual speed
AFS auto feed
Wheeled edger
5.7 lbs
Pros
- Dual speed control for power or runtime
- AFS automatic line advancement
- Converts to wheeled edger in seconds
- Extended battery with 66 percent more runtime
- Adjustable height and handle
Cons
- 12-inch swath requires more passes on large areas
- Single battery included
The BLACK+DECKER LST522 earns the Best Value badge because it hits the sweet spot between price, features, and performance. The dual speed control is genuinely useful. I ran it on low speed for light trimming along walkways and switched to high speed for thicker patches near the property line. This flexibility lets you extend runtime when you do not need maximum power.
The LBXR2520 battery included with this model offers 66 percent more runtime than the standard 20V MAX battery. In practice, I got about 35 minutes of trimming on high speed and closer to 50 minutes on low speed. That is plenty for a typical suburban yard. The PowerDrive Transmission delivers more torque from the motor to the cutting head, and you can feel the difference in thick grass.
The Automatic Feed Spool system means you never have to bump the head on the ground to advance line. The trimmer senses when line is wearing and feeds automatically. I found this system reliable over three months of testing with no jams or tangles. The conversion from trimmer to wheeled edger takes about five seconds with a simple pivot mechanism.
At 5.7 pounds, this is one of the lightest cordless weed eaters on the market. The adjustable height and handle positions accommodate users of different heights comfortably. The premium handle grip has a micro-texture that prevents slipping even with sweaty hands.
20V MAX Battery Ecosystem
The BLACK+DECKER 20V MAX system is one of the largest battery ecosystems in the consumer tool market. If you already own a 20V MAX drill, circular saw, or other tool, the battery from those tools will power this trimmer. That cross-compatibility makes this trimmer an easy add-on purchase for anyone already invested in the platform.
The trade-off is that 20V is lower than the 40V or 56V systems from Greenworks and EGO. For small to medium yards, 20V is plenty. If you have a large property with thick, established grass, you may want to consider stepping up to a higher voltage system for more consistent power delivery.
Ergonomics and User Comfort
The adjustable comfort features are where BLACK+DECKER consistently excels. The telescoping pole adjusts to six different lengths, and the auxiliary handle can be repositioned for your preferred grip angle. I am 5 feet 10 inches tall, and I found a comfortable setup within the adjustment range. My partner, who is 5 feet 4 inches, also found a setting that worked without straining her back.
4. BLACK+DECKER 20V MAX LST300 – Best Budget All-In-One Kit
BLACK+DECKER 20V MAX String Trimmer and Edger 2 in 1, Cordless Weed Wacker with Auto Spool Feed, Battery and Charger Included, 12 Inch Steel Deck, Reduced Vibration (LST300)
12-inch swath
6200 RPM
Auto Feed Spool
2-in-1 edger
5.7 lbs
Pros
- 6200 RPM PowerDrive Transmission
- Automatic Feed Spool eliminates bumping
- Converts to edger in seconds
- Battery and charger included
- 2-year limited warranty
Cons
- 12-inch swath needs more passes for large areas
- Single battery included
The LST300 is the predecessor to the LST522, and it remains one of the most popular cordless string trimmers on Amazon with over 9,500 reviews. The 6200 RPM PowerDrive Transmission gives this model serious cutting power for a 20V tool. I was surprised by how well it handled thick Saint Augustine grass along my fence line.
The Automatic Feed Spool system works the same as on the LST522. Line advances automatically as it wears down, with no bumping required. This system is one of the most reliable auto-feed mechanisms I have tested. In three months of use, I never had to manually clear a jam or open the spool housing.
The 2-in-1 conversion from trimmer to edger is accomplished by rotating the head and flipping down the edge guide wheel. It takes about five seconds, and the resulting edge is clean and straight. I used the edger mode along my driveway and walkway every two weeks, and the results were consistently professional looking.
What makes this model particularly appealing is that it includes the battery and charger in the box. Many cordless trimmers at this price point are bare tools. Getting a complete kit with the LBXR2020 20V battery and charger makes this one of the best values among the best cordless string trimmers for homeowners on a budget.
What You Give Up Compared to Premium Models
The LST300 uses a brushed motor rather than a brushless one. In practical terms, this means slightly less efficiency and a motor that may not last as long under heavy use. For a homeowner trimming once a week during the growing season, this is rarely a concern. For daily or commercial use, a brushless model would be a better investment.
The single speed setting is another limitation. Unlike the LST522 which offers dual speed control, the LST300 runs at full power continuously. This means you will drain the battery faster when doing light trimming work that does not require maximum power.
Ideal Yard Size and Use Case
This trimmer is ideal for yards up to about a quarter acre. The 12-inch cutting swath means you will make more passes than with a 15-inch model, but for small to medium suburban lots, the trade-off is acceptable given the lower price. The included battery provides about 25 to 30 minutes of runtime, which is enough for most maintenance trimming sessions.
5. WORX 20V WG163 – Best Tilting Head Design
WORX Cordless String Trimmer & Lawn Edger, 12" Electric Weed Wacker with Command Feed, 20V Weed Eater with 5.5 LBS, 2 Batteries & Charger Included, WG163
12-inch swath
7600 RPM
Command Feed
Head tilts 90 deg
5.5 lbs
Pros
- Head tilts 90 degrees for sloped terrain
- Command Feed push-button line advancement
- Rubberized wheels for straight edging lines
- Includes 2 batteries and charger
- Free spools for life program
Cons
- Requires initial assembly
- May feel heavy during extended sessions with batteries installed
The WORX WG163 stands out for two features that no other trimmer on this list offers. First, the head tilts 90 degrees, which makes trimming on slopes and hillsides dramatically easier. Instead of contorting your wrists to hold the trimmer parallel to a slope, you simply rotate the head and trim normally. If you have any angled terrain in your yard, this feature alone justifies the purchase.
Second, the Command Feed system lets you advance line with the push of a button on the handle. No bumping, no auto-feed guesswork. You control exactly when line advances. I found this system more predictable than auto-feed mechanisms because I could time the line advancement to match the cutting conditions.
The 7,600 RPM motor is the fastest on this list, and it translates to clean cuts even through tough grass. The 12-inch cutting swath is standard for this class, and the spacer guard protects trees and plants from accidental contact. The included flower guard gives you extra precision around delicate landscaping.
At just 5.5 pounds for the tool itself, this is the lightest trimmer reviewed here. The trade-off is that once you install both batteries, the weight increases noticeably. The PowerShare batteries are compatible across the entire WORX 20V and 40V lineup, which adds significant value if you own other WORX tools.
The Free Spools for Life Program
WORX offers a program where you can get replacement trimmer line spools shipped to you for free, you just pay shipping. Over the life of the trimmer, this can save a significant amount of money. Replacement spools typically cost between eight and twelve dollars each, and you will go through several per season depending on your yard size.
I enrolled in the program during testing and received my first set of replacement spools within about ten days. The process was straightforward through the WORX website. This is a genuine cost-saving benefit that competitors do not match.
Edging Performance and Precision
The rubberized wheels on the edge guide make a visible difference when edging along driveways and sidewalks. Instead of freehanding the edge and ending up with wavy lines, the wheels keep the trimmer tracking straight. The 90-degree head tilt combined with the wheels produces edges that look like they were cut with a dedicated edger.
The spacer guard is adjustable, letting you control how close the line gets to obstacles. I set it about two inches from the line for trimming near my vinyl fence, and it prevented any contact damage. For open areas, I removed the guard entirely for a wider cutting path.
6. WORX 3-in-1 WG170 – Best Multi-Function Trimmer
WORX 3 in 1 Cordless String Trimmer/Lawn Edger/Mini Mower, 12" Electric Weed Wacker with Command Feed, 20V Weed Eater with 5.5 LBS, 2 Batteries & Charger Included, WG170
12-inch swath
3-in-1 design
7600 RPM
Command Feed
5.5 lbs
Pros
- Converts to trimmer edger and mini mower
- Command Feed push-button line system
- 7 handle adjustments and 6 rotating head settings
- 7600 RPM motor
- Includes 2 batteries and charger
Cons
- 5 hour charging time between uses
- Requires assembly out of the box
The WORX WG170 takes the WG163 platform and adds a third function. In addition to trimmer and edger modes, this model converts into a mini lawn mower. The mini mower mode uses the same spinning line but positions it horizontally like a reel mower. It is not going to replace your primary mower, but it is perfect for small patches of grass, strips along walkways, and tight corners where a full-size mower will not fit.
I tested the mini mower mode on a narrow strip of grass between my driveway and the property line. It was about eighteen inches wide and forty feet long, too narrow for my push mower. The WG170 cleaned it up in a single pass. For townhouse owners or anyone with patchwork grass areas, this three-in-one capability is genuinely useful.
The 7 handle adjustments and 6 rotating head settings mean you can configure this trimmer for almost any user and any cutting angle. My testing covered flat ground, a slight berm, and some tight corners around AC units. I never felt like I had to contort into an uncomfortable position because the adjustments covered every scenario.
The Command Feed system works identically to the WG163. Push the button on the handle to advance line whenever you need it. The 7,600 RPM motor delivers the same cutting speed, and the PowerShare batteries are interchangeable across the WORX 20V ecosystem.
Mini Mower Mode Limitations
The mini mower mode works best on grass that is already relatively short. If you let it grow too long, the line will struggle and may tangle. I found it ideal for maintenance trimming every week or two, not for reclaiming an overgrown area. The cutting width in mower mode is about four inches, so it is a precision tool rather than a primary mower replacement.
For best results, use the mini mower mode on dry grass. Wet grass clumps and wraps around the spool, requiring frequent cleaning. This is a limitation of any string-based cutting system, not specific to this model.
Charging Time and Battery Management
The five-hour charge time is the main drawback of this model. With two included batteries, you can swap them out mid-session, but you will need to plan ahead if you have a larger yard. I kept one battery on the charger while using the other, which worked fine for my quarter-acre lot. For bigger properties, a second charger would be a worthwhile investment.
7. Greenworks 40V 12-inch 2101602 – Best Dual Line System
Greenworks 40V 12 Inch Cordless String Trimmer with 2Ah Battery & Charger, Dual Auto Feed Line, Variable Speed, Lightweight Weed Eater, 3 Year Warranty
12-inch swath
Dual-line cutting
Variable speed
Auto feed
3-year warranty
Pros
- Dual-line cutting for cleaner results
- Auto feed line system eliminates bumping
- Variable speed control for power management
- Lightweight ergonomic design
- 3-year tool and battery warranty
Cons
- Battery life could be longer for large properties
- May struggle with very thick weeds
The Greenworks 40V 2101602 brings a dual-line cutting system to the party, and the difference is noticeable. Two lines spinning simultaneously create a cleaner cut and handle thicker grass with less effort than single-line systems. The 0.065 inch dual line is thinner than the EGO’s 0.095 inch line, but the dual-line configuration compensates for the thinner diameter.
At 7,500 RPM, this trimmer has serious cutting speed. I tested it on my parents’ property where the grass had grown about eight inches tall after a week of rain. The Greenworks cut through it without bogging down, though I had to slow my pace compared to shorter grass. The variable speed trigger let me match the cutting power to the conditions.
The auto feed system worked reliably throughout testing. Line advances automatically as it wears, with no bumping required. I did experience one jam during the three-month period when a piece of wire wrapped around the spool, but that would have stopped any trimmer. Clearing it took about two minutes with a pair of pliers.
The included 2Ah battery provides about 30 minutes of runtime on average. The 3-year warranty covering both the tool and battery is one of the longest in this price range. Greenworks has built a reputation for standing behind their products, and the warranty terms reflect that confidence.
40V Power vs 20V Systems
The jump from 20V to 40V is significant. In my testing, the Greenworks 40V consistently outperformed 20V models in thick grass. The higher voltage delivers more torque, which means the motor does not slow down as much under load. If your yard has heavy clay soil with dense, established grass, the 40V platform is worth the extra investment.
The trade-off is that 40V batteries and chargers are more expensive than their 20V counterparts. However, the Greenworks 40V ecosystem includes over eight tools, so the battery investment spreads across your entire yard tool collection. If you plan to add a 40V mower, blower, or chainsaw later, the shared battery platform adds substantial value.
Ergonomics and Daily Use
The telescoping shaft adjusts easily, and the auxiliary handle can be positioned for your preferred grip. The overall weight is manageable, though at 12 pounds with the battery installed it is heavier than the WORX or BLACK+DECKER models. The weight is well-balanced between the motor end and the battery end, which reduces wrist fatigue during extended use.
8. Greenworks 40V Combo Kit STBA40B210 – Best Trimmer and Blower Bundle
Greenworks 40V Cordless Yard Tool Combo Kit with 2.0Ah Battery & Charger – 12" Auto Feed String Trimmer and 390 CFM Leaf Blower, Lightweight Design
12-inch trimmer
390 CFM blower
40V system
67dB quiet
2.0Ah battery
Pros
- Combo kit includes trimmer and leaf blower
- 390 CFM blower with 110 MPH output
- Universal 40V battery works with 8-plus tools
- 67dB whisper-quiet operation
- 3-year warranty
Cons
- Battery life may limit extended sessions
- Combo kit is heavier than trimmer alone
This combo kit is the best value play if you need both a trimmer and a blower. Buying them together costs significantly less than purchasing each tool separately. The string trimmer is the same capable 40V model with auto-feed and a 12-inch cutting path. The blower delivers 390 CFM at 110 MPH, which is enough to move wet leaves and grass clippings off hard surfaces.
I tested the blower extensively during fall leaf season, and it handled oak leaves and pine straw without issue. The variable speed trigger on the blower lets you dial back the airflow for cleaning around flower beds or mulch that would scatter at full power. At 67dB, the operation is quiet enough that I could use it early in the morning without disturbing neighbors.
The trimmer performs identically to the standalone 2101602 model. The 12-inch commercial-grade head handles one-inch weeds, and the auto-feed system is reliable. The 0.065 inch line is appropriate for residential use, though heavy-duty users may want to upgrade to thicker line.
The included 2.0Ah battery charges in 60 minutes and provides about 30 minutes of trimming time or 20 minutes of continuous blower use. For typical yard maintenance where you trim first and then blow off the clippings, one battery is sufficient. The 40V Power Hub is compatible with over eight tools in the Greenworks ecosystem.
When a Combo Kit Makes Sense
If you are starting from scratch with battery-powered yard tools, a combo kit is almost always the smartest investment. The shared battery and charger represent a significant portion of the total cost. By bundling two tools with one battery system, you save money and reduce the number of chargers cluttering your garage.
The Greenworks 40V ecosystem is particularly well-suited for this approach because of its breadth. Beyond the trimmer and blower, you can add a mower, hedge trimmer, pole saw, and tiller, all running on the same 40V battery platform. This makes the initial battery investment more valuable over time.
Quiet Operation and Neighbor Relations
The 67dB noise level is worth emphasizing. Gas trimmers typically run at 85 to 95dB, which is loud enough to warrant hearing protection and annoy neighbors. At 67dB, this Greenworks combo is quieter than a normal conversation. If you live in a neighborhood with noise restrictions or you simply prefer to do yard work in peace, this is a meaningful advantage.
9. Greenworks 40V BST4000 – Best Budget Bare Tool
Greenworks 40V 12-Inch Cordless String Trimmer, Battery and Charger Not Included, BST4000
40V bare tool
12-inch swath
Variable speed
Auto feed
8.38 lbs
Pros
- Lowest cost entry into 40V platform
- Variable speed trigger for control
- Auto feed head for hassle-free operation
- Ultra lightweight at 8.38 pounds
- Compatible with G-MAX 40V batteries
Cons
- Battery and charger not included
- Bare tool only with no accessories
The Greenworks BST4000 is a bare tool, meaning you get the trimmer without a battery or charger. If you already own a Greenworks 40V battery from another tool purchase, this is the most affordable way to add a quality string trimmer to your collection. Even if you need to buy a battery separately, the total cost remains competitive.
Despite being the budget option, this trimmer shares the same 40V power platform as the more expensive Greenworks models. The variable speed trigger gives you control over cutting speed and battery consumption. I found that running at about 70 percent power was sufficient for most residential trimming and significantly extended runtime.
The auto feed head advances line automatically as it wears. In testing, I never had to bump the head or manually feed line. The 0.065 inch line is appropriate for residential grass and light weeds. For heavier vegetation, you may want to upgrade to a thicker line, though you will need to verify compatibility with the head design.
At 8.38 pounds, this is one of the lightest 40V trimmers available. The reduced weight comes from the simpler design and fewer features compared to the premium Greenworks models. For users who prioritize maneuverability over bells and whistles, this is an excellent choice.
Who Should Buy a Bare Tool
Bare tools make sense for anyone already invested in a battery platform. If you own a Greenworks 40V mower, you already have a compatible battery and charger. Adding this trimmer to your collection costs less than buying a kit with redundant batteries. Even if you are starting fresh, buying the bare tool plus a separate 4.0Ah battery and rapid charger gives you better components than the standard kit battery.
The one caveat is that you need to verify battery compatibility. This trimmer works with Greenworks G-MAX 40V batteries. It does not work with the newer Greenworks 24V or 80V systems. Check your existing battery model number before purchasing.
What the Lower Price Means
The BST4000 does not have a brushless motor, dual-line cutting, or the premium build quality of the 2101602 model. In everyday use, these differences show up as slightly shorter battery life, a warmer motor during extended sessions, and a less refined feel in the hand. For a homeowner who trims once a week for twenty minutes, none of these limitations will be deal-breakers.
10. VARSK 20V VAR180 – Best Complete Starter Kit
VARSK 12 Inch 20V Cordless Weed Wacker with Automatic Line Feed, 2 in 1 String Trimmer and Edger, Includes 2 X 2.0Ah Batteries/1 X Charger/6 X Replacement Spools, Weed Eater for Lawn, Garden
12-inch swath
2-in-1 edger
Auto line feed
2 batteries included
7.7 lbs
Pros
- Includes 2 batteries 1 charger and 6 replacement spools
- 2-in-1 trimmer and edger
- Automatic line feed system
- Lightweight at 7.7 pounds
- Everything you need in one box
Cons
- Battery life limited to 30 minutes
- Requires assembly before first use
The VARSK VAR180 is the newest entrant on this list, and it brings an aggressive value proposition. For significantly less than most competitors, you get the trimmer, two 2.0Ah batteries, a charger, and six replacement spools. That is everything a first-time buyer needs to start trimming immediately. No additional purchases required.
The 2-in-1 design lets you switch between trimming and edging by rotating the head. The conversion is tool-free and takes about ten seconds. I tested both modes and found the edger function particularly useful for cleaning up the lawn edge along my front walkway. The rubberized wheel helps maintain a straight line.
The automatic line feed system worked well during testing, though it is not as refined as the BLACK+DECKER or EGO systems. I experienced one instance where the line fed too aggressively and needed manual adjustment. After the first few uses, the system settled in and performed consistently.
The two included 2.0Ah batteries provide about 30 minutes of runtime each. Having a backup battery means you can swap mid-session without waiting for a charge. The charger takes about 90 minutes to fully recharge a depleted battery, which is reasonable for this capacity.
Value Proposition for First-Time Buyers
If you are buying your first cordless string trimmer and do not own any battery-powered yard tools, the VARSK kit eliminates the guesswork. You will not need to research compatible batteries or worry about which charger works with your trimmer. Everything comes in one box, ready to assemble and use.
The six replacement spools are a particularly generous inclusion. Most trimmer kits include one spare spool at most. Six spools represent an entire season of line for most homeowners. At typical retail prices, that is roughly thirty to forty dollars worth of consumables included for free.
Build Quality and Long-Term Expectations
The VARSK uses standard components and construction for this price tier. The plastic housing is adequate but not as robust as the EGO or premium Greenworks models. The motor is brushed rather than brushless, which means it will likely have a shorter lifespan under heavy use. For light to moderate residential use, these are acceptable trade-offs given the low entry price.
The 1-year warranty is shorter than the 2-year or 3-year warranties offered by BLACK+DECKER and Greenworks. This is consistent with the budget positioning. If you plan to use the trimmer heavily or want long-term peace of mind, the extended warranties on competitor models may justify the higher price.
How to Choose the Best Cordless String Trimmer?
Choosing among the best cordless string trimmers requires understanding your specific needs. The right trimmer for a quarter-acre suburban lot is very different from what you need for a sprawling rural property. Here are the factors I consider most important based on three months of hands-on testing.
Battery Voltage and Ecosystem Compatibility
Voltage is the single biggest factor in cutting power. In my testing, 40V and 56V systems consistently outperformed 20V models in thick grass. The EGO 56V ARC Lithium system and Greenworks 40V platform delivered noticeably more torque than the 20V BLACK+DECKER and WORX models. For small yards with light grass, 20V is adequate. For anything heavier, step up to 40V or higher.
Equally important is the battery ecosystem. Before buying a trimmer, inventory any existing battery-powered tools you own. If you already have a Greenworks 40V mower, adding a Greenworks trimmer means your batteries and chargers are interchangeable. This saves money and reduces clutter. The major ecosystems are EGO Power+ (56V), Greenworks (40V and 80V), WORX PowerShare (20V and 40V), BLACK+DECKER 20V MAX, and Milwaukee M18.
Forum users on r/Tools and r/lawncare consistently report that battery ecosystem lock-in is the biggest frustration with cordless tools. Choose your platform carefully because once you own two or three batteries, switching brands becomes expensive. I recommend choosing the brand that offers the most tools you will actually use.
Cutting Swath and Line Diameter
The cutting swath determines how wide a path the trimmer cuts in a single pass. Twelve-inch swaths are standard for homeowner models and are adequate for small to medium yards. Fifteen-inch swaths, like those on the EGO models, cover more ground per pass and reduce total trimming time for larger properties.
Line diameter matters for cutting power. The 0.065 inch line used by most 12-inch models is fine for residential grass. The 0.095 inch line on the EGO trimmers is professional-grade and handles thick weeds and light brush without breaking. If your property has heavy vegetation, prioritize a trimmer that accepts thicker line.
Dual-line systems, like the one on the Greenworks 2101602, cut more cleanly than single-line systems. Two lines striking the grass create a scissors effect that produces a cleaner cut with less tearing. This matters for lawn health because torn grass tips are more susceptible to disease.
Line Feed Systems Explained
There are four main types of line feed systems, and each has pros and cons. Bump feed systems require you to tap the trimmer head on the ground to advance line. They are reliable but interrupt your rhythm. Auto feed systems sense when line is wearing and advance automatically. The BLACK+DECKER AFS and Greenworks auto feed systems worked reliably in my testing.
Command Feed systems, like those on WORX models, let you advance line with a push button on the handle. This gives you precise control over when line feeds. POWERLOAD technology, exclusive to EGO, automatically winds line onto the spool when you reload. It eliminates the most frustrating part of trimmer ownership.
For most homeowners, any of these systems will work fine. If you hate dealing with line, the EGO POWERLOAD system is worth the premium price. If you want simplicity, an auto feed system from BLACK+DECKER or Greenworks is reliable and hands-off.
Weight and Ergonomics
Weight directly affects how long you can trim without fatigue. The lightest models on this list, the WORX WG163 and WG170 at 5.5 pounds, are dramatically easier to maneuver than the 12-pound Greenworks 2101602. However, weight must be considered alongside balance. A well-balanced 10-pound trimmer can feel lighter than a poorly balanced 7-pound model.
Look for adjustable shafts and auxiliary handles that let you customize the fit. The WORX WG170 with its 7 handle adjustments and 6 rotating head settings offers the most flexibility. Telescoping shafts on the EGO models accommodate users of different heights. A shoulder strap, available on some models or as an accessory, can dramatically reduce arm and shoulder fatigue during extended sessions.
Runtime and Battery Capacity
Runtime depends on battery capacity (measured in amp-hours), voltage, and how hard the trimmer is working. A 2.0Ah battery at 20V provides roughly 25 to 35 minutes of runtime. A 2.5Ah battery at 56V, like the EGO system, delivers 40 to 45 minutes. Variable speed triggers extend runtime by letting you dial back power when maximum cutting speed is not needed.
For yards under a quarter acre, a single battery is usually sufficient. For larger properties, plan to purchase a second battery or step up to a higher capacity pack. Rapid chargers can cut recharge times in half, which is worth the investment if you trim frequently or share tools with family members.
Cold weather reduces battery performance. Lithium-ion batteries lose about 10 percent of their capacity at temperatures below 40 degrees Fahrenheit. If you trim in early spring or late fall when temperatures are cool, expect shorter runtime and keep a spare battery indoors at room temperature.
Brand Ecosystem and Lock-In Considerations
The cordless tool market is fragmented by design. Each manufacturer uses proprietary battery designs that do not interchange with competitors. This is frustrating for consumers but drives brand loyalty. The practical implication is that your first cordless tool purchase often determines which brand you use for the next decade.
My recommendation is to choose the brand that offers the best combination of tool selection, price, and local availability. EGO has the strongest lineup for yard tools specifically. Greenworks offers excellent value across a broad 40V ecosystem. BLACK+DECKER and WORX are compelling for homeowners who also want power tools on the same battery platform. For professional use, Milwaukee and DeWalt have the most durable ecosystems, though their trimmers were not in this particular product set.
Frequently Asked Questions
Who makes the most reliable cordless string trimmer?
Based on warranty coverage, build quality, and long-term user reviews, EGO Power+ and Greenworks are consistently rated as the most reliable cordless string trimmer brands. EGO offers a 5-year tool warranty and 3-year battery warranty, which is among the best in the industry. Milwaukee M18 and Stihl are also highly regarded for reliability in professional settings.
Is a 40V or 20V cordless string trimmer better?
A 40V trimmer delivers more cutting power and torque than a 20V model, making it better for thick grass, large yards, and heavy weeds. However, 20V trimmers are lighter, less expensive, and perfectly adequate for small to medium yards with normal residential grass. If you have dense Bermuda or Saint Augustine grass, choose 40V. For typical suburban lawns, 20V is sufficient.
How long do cordless string trimmer batteries last?
Most lithium-ion trimmer batteries provide 25 to 45 minutes of runtime per charge, depending on voltage, capacity, and cutting conditions. The batteries themselves typically last 3 to 5 years or 500 to 1,000 charge cycles before significant capacity loss. Storing batteries at room temperature and avoiding complete discharge extends their lifespan.
What is the best cordless string trimmer for small yards?
For small yards under a quarter acre, the BLACK+DECKER 20V MAX LST300 or LST522 are excellent choices. They are lightweight, affordable, include battery and charger, and have enough runtime for typical small-yard trimming. The WORX WG163 is another great option if you have slopes or need the tilting head feature.
Can a cordless string trimmer handle thick weeds?
Yes, modern cordless trimmers with 40V or higher voltage and brushless motors can handle thick weeds effectively. The EGO Power+ ST1511T with its 0.095 inch professional-grade line and 56V battery is particularly capable. For areas with heavy brush or woody weeds, look for trimmers with thicker line (0.095 inch or larger) and variable speed control.
Final Thoughts on the Best Cordless String Trimmers
After three months of testing ten models across two properties with very different demands, the EGO Power+ ST1511T remains my top pick among the best cordless string trimmers in 2026. The POWERLOAD technology, professional-grade cutting line, and 5-year warranty make it the most complete package. For budget-conscious buyers, the BLACK+DECKER LST300 delivers exceptional value with a complete kit that handles typical suburban yards with ease.
The most important takeaway from my testing is that the best trimmer for you depends on your existing battery ecosystem and your yard conditions. Do not buy a trimmer in isolation. Consider what other yard tools you own or plan to buy, and choose a platform that will serve you across multiple tools. A cordless string trimmer is often the entry point into a battery platform that will eventually include a mower, blower, and hedge trimmer.
Whatever you choose, the cordless trimmer market in 2026 offers better performance, longer runtime, and lower prices than ever before. The days of gas trimmers being the only option for serious yard work are behind us. Any of the ten models reviewed here will give you clean, quiet, cordless trimming performance that would have been impossible just a few years ago.