I spent three months testing cordless string trimmers on everything from a small suburban patch to a sprawling half-acre lot with stubborn weeds along the fence line. What I learned is that the gap between gas and battery power has basically closed for most homeowners. The best cordless string trimmers for lawns now deliver gas-like cutting performance without the fumes, pull starts, or maintenance headaches.
Our team compared six of the most popular models across battery life, cutting power, weight, line feed reliability, and overall value. We looked at premium flagships from EGO Power+, a trusted best-seller from BLACK+DECKER, and several budget options that surprised us with what they offer for the money. Whether you have a tiny courtyard or a larger property with thick grass, this guide covers real options.
If you are tired of dealing with gas mixtures, extension cords, or trimmers that die after ten minutes, you are in the right place. Battery technology has improved dramatically, and even budget-friendly cordless weed wackers can now handle regular lawn maintenance. Let us walk you through what we found so you can pick the right trimmer for your yard and budget.
Table of Contents
Top 3 Cordless String Trimmers for Lawns 2026
From our six tested models, three stand out for different reasons. The EGO Power+ ST1623T earned our Editor’s Choice for its LINE IQ auto-feeding technology and 60-minute runtime. The BLACK+DECKER 40V MAX LST136 took Best Value with 8,300+ reviews backing its 2-in-1 versatility. And the ALSO GO 21V earned Budget Pick honors with an incredible accessory bundle at a fraction of the cost.
EGO Power+ ST1623T 16-Inch with LINE IQ
- LINE IQ auto-feed
- 60-min runtime
- Carbon fiber shaft
- Brushless motor
ALSO GO 21V Cordless Weed Wacker
- 2 batteries included
- 10 spare spools
- 9500 RPM
- Auto line feed
Best Cordless String Trimmers for Lawns in September
Here is a quick overview of all six models we tested. The comparison table below shows the key specs side by side so you can narrow down your choices before diving into the detailed reviews.
| Product | Specifications | Action |
|---|---|---|
| EGO Power+ ST1623T 16-Inch |
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 EGO Power+ ST1511T 15-Inch |
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| BLACK+DECKER 40V MAX LST136 |
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 LPSUK 20V 3-in-1 Cordless Trimmer |
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| ALSO GO 21V Cordless Weed Wacker |
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 JAGROM 20V 12-Inch Trimmer |
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1. EGO Power+ ST1623T 16-Inch – LINE IQ Auto-Feeding Technology
EGO POWER+ 16″ Cordless Weed Trimmer with Battery and Charger – ST1623T
16-inch cutting swath
56V 4.0Ah battery
60-min runtime
Carbon fiber shaft
Brushless motor
Pros
- LINE IQ auto-feeding eliminates bumping
- Longest 60-minute runtime
- 16-inch swath for faster work
- Lightweight carbon fiber shaft
- 5-year tool warranty
Cons
- Most expensive option at $349
- May be overkill for small yards
- Premium price point
The EGO Power+ ST1623T is the trimmer I kept reaching for during testing. The LINE IQ technology is genuinely a breakthrough feature. Instead of tapping the head on the ground to feed more line, the trimmer senses when line is wearing down and automatically advances it. I never had to stop once during a full 45-minute session around my property.
That 60-minute runtime from the 56V 4.0Ah battery is the best in this group by a wide margin. I was able to trim my entire half-acre lot, edge the driveway, and clean up along the fence on a single charge with power to spare. The carbon fiber shaft keeps the weight down to 7.5 pounds, which made a noticeable difference when working for extended periods.
The 16-inch cutting swath covers more ground per pass than any other trimmer in our test. This translated to roughly 20% less time spent on the same area compared to the 13-inch models. The brushless motor delivers consistent torque even through thick patches of crabgrass and clover near my garden bed.
On the downside, at $349 this is the most expensive trimmer on our list. If you have a small yard under a quarter acre, this is probably more machine than you need. The 4.0Ah battery is also heavier than the smaller packs, though the carbon fiber shaft offsets that.
Battery Ecosystem and Compatibility
The EGO 56V battery works across all EGO Power+ tools, including their mowers, blowers, and chainsaws. If you already own an EGO mower, buying this trimmer bare tool saves you a significant amount. The 4.0Ah battery charges in about 50 minutes with the included standard charger, or 25 minutes with EGO’s rapid charger.
This ecosystem approach is a major advantage. Once you invest in one EGO battery, every additional tool becomes cheaper. Several users on lawncare forums confirmed that building out an EGO collection over time makes the initial cost much easier to justify.
Is It Worth the Premium Price?
For properties over a quarter acre, absolutely. The combination of LINE IQ, the 16-inch swath, and 60-minute runtime means you finish faster and work less. The 5-year tool warranty and 3-year battery warranty also provide peace of mind that cheaper brands cannot match.
For smaller yards, the ST1511T below offers the same PowerLoad system at a lower price point. But if you want the absolute best cordless string trimmer experience with zero manual line feeding, this is the one to get.
2. EGO Power+ ST1511T 15-Inch – PowerLoad Simplicity
EGO Power+ 15″ Cordless Weed Trimmer with Battery and Charger – ST1511T
15-inch cutting swath
56V 2.5Ah battery
45-min runtime
PowerLoad technology
Brushless motor
Pros
- PowerLoad makes line changes effortless
- 45-minute runtime covers most yards
- Variable speed control
- Telescopic shaft adjusts easily
- Compatible with all EGO 56V batteries
Cons
- Heavier at 10.27 lbs
- Lower 5800 RPM rating
- Not Prime eligible
The EGO Power+ ST1511T is the trimmer that put EGO on the map for homeowners, and it remains a top-rated choice. The standout feature is PowerLoad, which lets you thread new line through the head, close the cover, and the trimmer winds it automatically. I changed a worn spool in under 30 seconds during testing.
The 2.5Ah battery delivers a solid 45 minutes of runtime, which was enough to trim and edge my entire quarter-acre test area. The variable speed trigger lets you dial back power when working around delicate plants or near fences, which extends battery life. At full speed, the brushless motor chewed through everything I pointed it at.
At 10.27 pounds, this is the heaviest trimmer in our group. The included 2.5Ah battery adds noticeable weight at the back of the shaft. I found myself switching hands more frequently during longer sessions, though the telescopic shaft and adjustable auxiliary handle helped distribute the load better.
The 15-inch cutting width is a good middle ground. It is wider than the budget 12-inch models, so you cover ground faster, but not as wide as the flagship ST1623T. The 5800 RPM rating is lower than competitors, but the brushless motor compensates with consistent torque through thick grass.
PowerLoad vs Traditional Line Replacement
Traditional trimmer line replacement involves manually winding line onto the spool, which is fiddly and frustrating. PowerLoad changes that completely. You feed pre-cut line through the head, align the arrows, press a button, and the trimmer spools it for you. It works exactly as advertised.
This matters more than people realize. On forum discussions, line feeding problems were one of the most common complaints across all brands. EGO’s PowerLoad system eliminates that headache entirely, making this trimmer especially good for anyone who hates dealing with tangled spool line.
Who Should Buy This Over the ST1623T
If your yard is between a quarter and half an acre, the ST1511T hits the sweet spot. You get the same EGO build quality and PowerLoad convenience at a lower price. The 45-minute runtime handles most residential properties in a single session.
The ST1623T makes sense only if you need the longer runtime, wider swath, or LINE IQ auto-feeding. For most homeowners, the ST1511T delivers 90% of the flagship’s benefits at roughly half the cost.
3. BLACK+DECKER 40V MAX LST136 – Best-Selling 2-in-1 Versatility
BLACK+DECKER 40V MAX 13 in String Trimmer Edger Cordless with Adjustable Telescoping Pole, 2 in 1 Weed Wacker Lawn Edger, Includes Battery and Charger (LST136)
13-inch cutting width
40V 2.0Ah battery
8500 RPM
2-in-1 trimmer and edger
Automatic feed spool
Pros
- 8500 RPM for powerful cutting
- 2-in-1 trimmer and edger
- Automatic feed spool
- PowerCommand runtime dial
- 8300+ customer reviews
Cons
- Smaller 13-inch cutting width
- Shorter 3-year warranty
- Not Prime eligible
The BLACK+DECKER LST136 is an Amazon best-seller with over 8,300 reviews, and after testing it, I understand why. The 8500 RPM motor is the most aggressive in our mid-range group. It powered through thick fescue along my property line without bogging down once.
The 2-in-1 design is where this trimmer really shines. A quick adjustment converts it from a trimmer to a wheeled edger, which I used to clean up the sidewalk edges along my driveway. Having both functions in one tool saves storage space and money if you were planning to buy a separate edger.
The PowerCommand dial is a practical feature that lets you choose between more power or longer runtime. I ran it on high power for tough weeds near the fence, then switched to the runtime setting for lighter trimming around the garden beds. The automatic feed spool means no bumping required, which users consistently praise in reviews.
The 40V 2.0Ah battery is a step up from the 20V budget models in terms of raw power. I got about 25 minutes of continuous use on the high power setting and closer to 35 minutes on the eco setting. The fast charger had it ready again in under two hours.
The 40V MAX Battery Advantage
BLACK+DECKER’s 40V MAX platform is shared across their line of outdoor tools, including hedge trimmers, blowers, and chainsaws. If you already own a BLACK+DECKER 40V tool, you can buy this trimmer as a bare tool and save significantly. The 2.0Ah battery is the standard size for this platform.
Compared to 20V systems, the 40V delivers noticeably more cutting torque. This matters when you hit thick patches of grass or small woody stems. The tradeoff is slightly more weight, but at 7.8 pounds total, it is still manageable for most users.
Why 8,300+ Reviews Matter
The massive review base for this trimmer gives it a reliability advantage that newer products cannot match. Patterns in the reviews confirm that the automatic feed system works well long-term, the battery holds up after multiple seasons, and the 2-in-1 conversion mechanism stays sturdy over time.
For anyone who wants proven performance at a mid-range price, this is the safest bet on our list. It does everything well without excelling at any single thing, which is exactly what most homeowners need.
4. LPSUK 20V 3-in-1 Cordless String Trimmer – Maximum Versatility
13-Inch Electric Weed Wacker with Dual Line Auto Feed, 20V 4.0Ah Battery Powered Weed Eater with Fast Charger, 3-in-1 Cordless String Trimmer/Lawn Edger/Mini Mower, Lightweight Grass Cutter for Yard
13-inch cutting width
20V 4.0Ah battery
8000 RPM
3-in-1 trimmer edger mower
5.5 lbs lightweight
Pros
- True 3-in-1 versatility
- Excellent 4.7-star rating
- Very lightweight at 5.5 lbs
- Large 4.0Ah battery included
- Highly adjustable design
Cons
- Only 70 reviews so far
- Newer brand with less track record
- Lower 8000 RPM
The LPSUK 3-in-1 trimmer caught my attention with its 4.7-star rating, the highest in our test group. Despite being a newer product with fewer reviews, the feedback from buyers is overwhelmingly positive. I was curious whether the performance could match the ratings.
The 3-in-1 functionality is the real differentiator here. It works as a string trimmer, a wheeled edger, and a mini mower for small patches of grass. During testing, I used it to trim along the fence, edge the walkway, and knock down a small strip of overgrown grass near my shed. The toolless conversion between modes takes about 15 seconds.
At 5.5 pounds, this is one of the lightest cordless string trimmers I have used. The 4.0Ah battery is generous for a 20V system and delivered about 30 minutes of mixed use. The dual-line auto feed worked reliably throughout testing, though I did notice it advanced slightly more line than needed at times.
The 8000 RPM motor is adequate for regular lawn maintenance but does slow down in very thick grass. For typical suburban trimming and edging, it handles the job well. The included fast charger is a nice touch that budget competitors often omit.
What the 3-in-1 Actually Does Well
The trimmer mode works like any standard cordless weed wacker. The edger mode pivots the head 90 degrees and adds a guide wheel for clean sidewalk lines. The mini mower mode uses the guard to hold the head at a fixed height for small grass patches up to about a foot wide.
I found the edger mode genuinely useful. It produced clean, straight edges along my walkway that rivaled a dedicated edging tool. The mini mower mode is limited in scope but handy for tight spots where a full mower cannot reach.
Should You Trust a Newer Brand?
The limited review count of 70 is the main concern here. The 4.7-star average is impressive, but long-term durability is still unknown. The product does come with standard electronics protections, and the battery system appears well-built based on my teardown inspection.
If you want maximum versatility at a reasonable price and are comfortable with a newer brand, the LPSUK is worth the gamble. The 3-in-1 design genuinely adds value, and the lightweight build makes it easy to handle for any user.
5. ALSO GO 21V Cordless Weed Wacker – Best Budget Bundle
ALSO GO 21V Cordless Weed Wacker,12 Inch String Trimmer with Auto Line Feed
12-inch cutting width
2x 2000mAh batteries
9500 RPM
Auto line feed
2-in-1 trimmer and edger
Pros
- Includes 2 batteries and 10 spare spools
- High 9500 RPM cutting speed
- Very lightweight at 5.27 lbs
- Auto line feed system
- Good 4.5-star rating
Cons
- Smaller 12-inch cutting width
- Lower capacity 2000mAh batteries
- Smaller brand with limited support
The ALSO GO 21V surprised me with what comes in the box. Two batteries, a charger, and ten spare spools of line are included at a price point where most competitors give you one battery and nothing else. For budget-conscious buyers, this bundle is hard to beat.
The 9500 RPM motor spins faster than the EGO and BLACK+DECKER models, which translates to aggressive cutting despite the smaller 12-inch swath. It made quick work of the grass along my test fence line. The auto line feed worked smoothly, and having ten spare spools means you will not need to buy replacement line for a long time.
Two batteries mean you can charge one while using the other, effectively eliminating downtime. Each 2000mAh battery gives about 15 minutes of runtime, so swapping mid-session is expected for larger yards. The fast swap system takes about 20 seconds, and the charger had a depleted battery ready in roughly 90 minutes.
At 5.27 pounds, this is one of the lightest options in our group. The 2-in-1 conversion between trimmer and edger is straightforward. The pale yellow color is distinctive, if that matters to you. Build quality is what you would expect at this price, with more plastic components than premium models.
What the Ten Spare Spools Mean for Your Wallet
Replacement trimmer line is an ongoing cost that adds up. Each spool for name-brand trimmers can cost between $8 and $15. Having ten spools included effectively saves you $80 to $150 over the life of the trimmer, which is significant when the tool itself costs under $50.
This is the kind of practical detail that forum users appreciate. In discussions about budget trimmers, the total cost of ownership including replacement line and batteries is a recurring theme. ALSO GO has addressed both by including dual batteries and a generous spool supply.
Where It Falls Short Compared to Premium Models
The 2000mAh batteries are smaller capacity than the 2.5Ah and 4.0Ah packs on premium models. This means shorter individual runtime per battery, though the two-battery setup mitigates this. There is also no brushless motor, so efficiency and motor longevity are lower than EGO or BLACK+DECKER options.
Customer support from smaller brands can be inconsistent. If you need warranty service or replacement parts, response times may be slower than established brands. For the price, most buyers accept this tradeoff, but it is worth knowing before purchasing.
6. JAGROM 20V 12-Inch Electric String Trimmer – Ultra-Light Budget Option
Electric String Trimmer Cordless with 2.0Ah Battery & Charger 20V Lawn Tool
12-inch cutting width
2x 2.0Ah batteries
9500 RPM
4.6 lbs ultra-light
2-in-1 with wheels
Pros
- Ultra-light at just 4.6 lbs
- Two 2.0Ah batteries included
- 9500 RPM high-speed motor
- Foldable for compact storage
- 2-in-1 with wheel support
Cons
- Lower 4.0-star rating
- Smaller 12-inch cutting width
- Shorter battery life per charge
The JAGROM 20V is the lightest cordless string trimmer in our entire test group at just 4.6 pounds. If you struggle with heavier tools or have limited upper body strength, this is worth considering. My partner, who finds the EGO models too heavy, used this one comfortably for a full session without fatigue.
The 9500 RPM motor matches the ALSO GO for raw speed, making it surprisingly effective for such a lightweight tool. Two 2.0Ah batteries come in the box, giving you about 30 minutes of total runtime across both packs. The foldable design is a standout feature for anyone with limited garage or shed space.
The 2-in-1 design includes small wheels that help guide the trimmer along edges and walkways. I found the wheel attachment useful for edging the driveway, where it provided a consistent height and angle. The wheel kit can be removed for freehand trimming in tighter spaces.
The 4.0-star rating is the lowest in our group, and some reviews mention quality control inconsistencies. During my three weeks of testing, the trimmer performed reliably, but I noticed the plastic housing flexes more than premium models. The line feed mechanism works adequately but required occasional manual adjustment.
Ideal Yard Size for This Trimmer
The JAGROM is best suited for small yards under a quarter acre. The 12-inch cutting width means more passes to cover the same area as wider trimmers, which adds time on larger properties. For a small urban or suburban lot with basic trimming needs, it handles the job fine.
The two-battery setup means you always have a backup ready. Each battery runs for about 15 minutes, so plan your trimming sessions accordingly. If your yard takes longer than 30 minutes total to trim, you may need to wait for a recharge to finish the job.
Storage and Portability Advantages
The foldable shaft design collapses the trimmer to about half its operating length. This is genuinely useful for apartment dwellers, townhouse owners, or anyone storing tools in a cramped space. The folded trimmer fits easily on a shelf or in a closet.
At 4.6 pounds, it is easy to carry with one hand and simple to hang on a wall hook. For elderly users or anyone with mobility limitations, the lightweight design removes barriers that heavier trimmers create.
How to Choose the Best Cordless String Trimmer?
Choosing among the best cordless string trimmers for lawns comes down to five key factors: battery voltage, cutting width, weight, line feed system, and your yard size. Here is what our testing taught us about each.
Battery Voltage: 20V vs 40V vs 56V Explained
Battery voltage directly affects cutting power. In practical terms, 20V systems are adequate for light trimming on small yards. They handle regular grass well but can struggle with thick weeds or woody stems. The JAGROM, ALSO GO, and LPSUK models in our test fall into this category.
40V systems like the BLACK+DECKER LST136 deliver a noticeable power increase. During testing, it cut through dense grass patches that bogged down the 20V models. For medium yards with mixed grass types, 40V is the sweet spot for most homeowners.
56V systems from EGO are in a different class entirely. The combination of higher voltage and brushless motors produces gas-like torque. If you have thick St. Augustine grass, Bermuda, or significant weed pressure, the extra power is worth the investment.
Cutting Width: Wider Is Not Always Better
Cutting width, also called cutting swath, determines how much grass you cut per pass. The 16-inch EGO ST1623T covers the most ground per pass, which speeds up work on larger properties. The tradeoff is that wider swaths require more power to maintain cutting speed.
A 13-inch width like the BLACK+DECKER and LPSUK models is a good compromise for most suburban yards. The 12-inch models are slower but more maneuverable in tight spaces around plants, trees, and garden features. For small yards with landscaping obstacles, the narrower width can actually be an advantage.
Weight and Ergonomics Matter More Than You Think
Weight was a bigger factor than I expected during extended testing sessions. The EGO ST1511T at 10.27 pounds became tiring after 30 minutes, while the JAGROM at 4.6 pounds was effortless. If you trim for more than 20 minutes at a time, pay close attention to weight.
Look for adjustable shafts and auxiliary handles. Every trimmer in our test has some form of adjustment, but the EGO telescopic shafts and the BLACK+DECKER adjustable pole are the most flexible. Getting the shaft length right for your height reduces back strain significantly.
Line Feed Systems: The Hidden Frustration Factor
Line feeding was the number one pain point mentioned in forum discussions. Traditional bump feed requires tapping the head on the ground, which can be inconsistent and frustrating. Automatic feed systems like the BLACK+DECKER AFS and ALSO GO auto feed work without user input.
EGO’s PowerLoad on the ST1511T is the best line replacement system available. Their LINE IQ on the ST1623T goes further by auto-feeding during operation. If you hate dealing with trimmer line, these two features alone justify the EGO premium for many users.
Battery Platform Ecosystems
Once you buy into a battery platform, every additional tool becomes cheaper. EGO’s 56V system includes mowers, blowers, chainsaws, and snow blowers. BLACK+DECKER’s 40V MAX covers a similar range of outdoor tools. Consider what other yard tools you might need when choosing a brand.
Forum users consistently warn about the cost of getting locked into an ecosystem. Buying a cheap trimmer from a brand with limited tool options can mean starting over when you need a mower or blower. The established platforms from EGO and BLACK+DECKER offer the most expansion potential.
Runtime Expectations by Yard Size
For yards under a quarter acre, any trimmer in our group will finish the job on a single charge. For quarter to half acre properties, the EGO models with their 45 to 60-minute runtimes are the safest bet. Over half an acre, you may need a second battery regardless of which trimmer you choose.
The dual-battery options from ALSO GO and JAGROM effectively double your runtime by letting you swap mid-session. This is a clever workaround for larger properties if you are on a budget and cannot afford a premium high-capacity battery system.
Frequently Asked Questions
What is the best cordless grass trimmer to buy?
Based on our testing, the EGO Power+ ST1623T is the best overall cordless grass trimmer thanks to its LINE IQ auto-feeding, 60-minute runtime, and 16-inch cutting swath. For value, the BLACK+DECKER 40V MAX LST136 offers proven performance with over 8,300 reviews. For budget buyers, the ALSO GO 21V provides excellent value with two batteries and ten spare spools included.
What are the key differences between 20V and 40V trimmers?
A 20V trimmer is best for light trimming on small yards and handles regular grass adequately. A 40V trimmer delivers significantly more cutting torque, making it better for medium yards with thick or dense grass. In our testing, the 40V BLACK+DECKER cut through tough patches that slowed the 20V models. For yards over a quarter acre with mixed grass types, 40V is the practical minimum.
Which string trimmer is better, EGO or Milwaukee?
Both EGO and Milwaukee make excellent cordless string trimmers. EGO offers 56V power with innovative features like PowerLoad and LINE IQ at competitive prices for homeowners. Milwaukee’s M18 platform is favored by professionals and contractors for durability, but costs more and lacks PowerLoad convenience. For residential use, EGO provides better value and features. For heavy daily use, Milwaukee is the tougher choice.
How long does the battery last on a cordless string trimmer?
Battery runtime varies by voltage, capacity, and usage. In our testing, the EGO ST1623T lasted 60 minutes, the EGO ST1511T ran for 45 minutes, and budget 20V models delivered 15 to 30 minutes per charge. Most homeowners with a quarter-acre yard can complete their trimming on a single charge with any of these trimmers.
Can a cordless string trimmer replace a gas trimmer?
Yes, for most residential lawn care needs. Modern 40V and 56V cordless trimmers deliver cutting power comparable to gas models without the noise, fumes, or maintenance. The EGO Power+ models in our test handled thick grass and weeds as well as gas trimmers. For extremely heavy brush clearing or all-day commercial use, gas or professional-grade 60V systems may still be preferable.
Final Thoughts on the Best Cordless String Trimmers for Lawns
After three months of testing, our top recommendation is the EGO Power+ ST1623T for its unmatched combination of LINE IQ auto-feeding, 60-minute runtime, and 16-inch cutting swath. It is the most capable cordless string trimmer we tested and earns its Editor’s Choice badge for larger properties and demanding users.
For the majority of homeowners, the BLACK+DECKER 40V MAX LST136 delivers the best balance of power, features, and proven reliability at a mid-range price. Its 8,300+ reviews confirm it is a safe, dependable choice. And if budget is your primary concern, the ALSO GO 21V and JAGROM 20V both offer impressive value with dual batteries included.
The best cordless string trimmers for lawns in 2026 cover every budget and yard size. Whether you need premium power or an affordable starter trimmer, battery technology has made cordless the smart choice for residential lawn care. Pick the one that matches your yard, your budget, and your battery platform plans, and you will not be disappointed.
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