Ditching the gas can and pull cord is a major upgrade for anyone who trims weeds and edges lawns. Modern battery-powered string trimmers have closed the performance gap with gas while weighing significantly less, starting instantly, and running much quieter. But with so many models on the market — varying in battery voltage, cutting width, feed mechanisms, and brand ecosystems — choosing the right one can quickly become overwhelming if you don’t know what actually matters in daily use.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. My deep market research involves analyzing technical specifications, studying horticultural data, and synthesizing aggregated owner feedback to identify the best tools for outdoor maintenance.
In this guide, I break down seven top cordless string trimmers across different price and performance tiers, compare their real-world specs, and share what actual owners consistently praise or critique. After studying specs and thousands of owner reviews, the best cordless string trimmer delivers the best mix of power, runtime, and comfort for most yards.
How To Choose The Best Cordless String Trimmer
Buying a cordless string trimmer involves more than just picking the most popular brand. To get a model that will handle your yard without frustration, focus on these four areas.
Battery Voltage & Power Platform
Higher voltage (e.g., 40 V, 56 V, 60 V) generally delivers more torque and longer runtime than lower voltage (20 V), especially for thick weeds. But voltage isn’t everything — the battery amp-hour (Ah) rating also determines how long you can work. A 4 Ah battery at 40 V can outlast a 2 Ah battery at the same voltage. Also consider the brand’s power‑tool platform: if you already own tools that share batteries, sticking with that ecosystem saves money and reduces clutter.
Cutting Width & Line Thickness
A wider cutting swath (13–17 inches) covers more ground per pass, making the job faster. However, wider swaths also demand more power. Thicker line (0.080–0.105 in) handles heavier growth, while thinner line (0.065 in) is fine for light grass. Some trimmers accept both, giving you flexibility.
Feed Mechanism: Bump vs. Automatic vs. Manual
Bump feed requires you to tap the head on the ground to advance line — it’s simple and reliable. Automatic feed (like EGO’s Line IQ) senses when the line is short and feeds it without stopping, but it adds complexity and weight. Manual feed (button press) gives you full control. Choose based on your tolerance for fiddling mid‑job.
Weight, Balance & Ergonomics
Lightweight trimmers under 7 lbs reduce fatigue, but balance matters more than raw weight. A well‑balanced tool with an adjustable handle and telescopic shaft lets you work comfortably for longer. Curved shafts are easier for smaller users, while straight shafts reach under shrubs and make edging simpler.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| EGO Power+ ST1623T | Cordless String Trimmer | Large yards, heavy weeds | 16″ cutting width, 56 V, auto-feed (Line IQ), carbon-fiber shaft | Amazon |
| DEWALT DCST972X1 | Cordless String Trimmer | Attachment‑compatible, gas‑like power | 15–17″ adjustable, 60 V, 0.080″ line, variable speed | Amazon |
| Husqvarna 320iL | Cordless String Trimmer | Quiet performance, edging precision | 16″ cutting width, 40 V, Dual‑Direction head, Power Boost | Amazon |
| Greenworks ST40B213 | Cordless String Trimmer | Value for moderate yards | 15″ cutting width, 40 V, 0.085″ line, brushless motor | Amazon |
| WORX WG173 | 3‑in‑1 Trimmer/Edger/Mini Mower | Versatility on small properties | 13″ cutting width, 20 V, Command Feed, 6.62 lbs | Amazon |
| Greenworks 48V Combo Kit | Combo (Mower+Trimmer+Blower) | Complete lawn care bundle | 20″ mower, 12″ trimmer, 320 CFM blower, 4 Ah ×2 + 2 Ah | Amazon |
| Xinweilan GCJ‑0012 | Cordless Weed Wacker (Stringless) | Very small yards, budget entry | 6″ cutting width, 21 V, 3 blades, 3.28 lbs | Amazon |
In‑Depth Reviews
1. EGO Power+ ST1623T 56-Volt 16-Inch Cordless String Trimmer
The EGO ST1623T sits at the top of the cordless string‑trimmer class for good reason. It packs a 56‑volt power plant that feels closer to a gas engine than any electric model I’ve studied, yet it starts with a simple push of a button. The bundled 4.0 Ah battery delivers up to 60 minutes of runtime, and the kit also includes a spare 2.5 Ah battery — a thoughtful addition that lets you keep working while one pack charges. The telescopic carbon‑fiber shaft is exceptionally rigid and lightweight, and it adjusts to fit users of different heights without any compromise in balance.
What really sets the ST1623T apart is the patented Line IQ technology. Instead of bumping the head on the ground, an internal sensor automatically feeds trimmer line as needed, maintaining a consistent 16‑inch cutting swath. Owners consistently report that this system works flawlessly, eliminating the frustration of stopping to tap the head. Powerload winding — just feed line through the head and press a button to spool it — is another time‑saver that gets high marks from users.
On the downside, the trimmer head is noticeably larger and heavier than conventional designs, which shifts the balance point. Many owners recommend using a shoulder harness for extended sessions. The included charger is also louder than expected. Despite these minor quibbles, the combination of power, intelligent features, and build quality makes this the model most likely to satisfy owners of medium to large yards who want a gasoline‑grade experience without the hassle.
What works
- Excellent cutting power — handles weeds thicker than a pencil
- Line IQ auto‑feed and Powerload winding are genuinely effortless
- Telescopic carbon‑fiber shaft is both light and incredibly strong
- Long runtime and quick recharge keep you working
What doesn’t
- Heavier head changes balance — a harness is recommended
- Charger produces a louder hum than competing units
- Premium price point may be overkill for very small lawns
2. DEWALT 60V Cordless String Trimmer (DCST972X1)
DEWALT brings its professional‑grade engineering to the cordless trimming market with the DCST972X1. Powered by a 60‑volt max battery, this machine delivers torque that competing 40‑volt units simply can’t match. The brushless motor is paired with a high‑performance transmission that spins the head with authority, easily slicing through overgrown weeds and thick grass. A key advantage is the universal attachment system: you can swap the trimmer head for an edger, hedge trimmer, or pole saw, making this a true system tool for more than just grass.
The adjustable cutting swath — 15 in or 17 in — lets you match the width to the task, and the variable‑speed trigger with hi/lo range gives you precise control whether you’re trimming delicate flower beds or clearing fence lines. Owners consistently praise the quick‑load spool, which drastically reduces downtime when re‑spooling line. The tool also accepts 0.095‑inch line for heavier work, giving you flexibility without needing a different head.
Where the DEWALT falls short is battery life. Several owners note that the included 60V battery can run out in as little as 20–30 minutes under heavy load, and the tool seems hungry for power. If you have a large property, you’ll almost certainly need to buy a second or third battery. Additionally, the spool housing can be finicky when winding line — some users had to resort to aftermarket spools or careful manual winding before the head would feed reliably. The weight (about 15 lbs with battery) is on the high side, and the lack of a shoulder strap is a missed opportunity.
What works
- Industry‑leading power — as strong as many gas trimmers
- Attachment‑compatible, increasing value if you already own DEWALT attachments
- Variable trigger and dual speed give excellent control
- Fast load spool reduces re‑stringing headaches
What doesn’t
- Battery run time is mediocre, especially on full power
- Heavy — can fatigue the shoulder during longer sessions
- Line spool assembly can be tricky to wind correctly
3. Husqvarna WeedEater 320iL Cordless String Trimmer
Husqvarna brings its Swedish engineering heritage to the battery market with the 320iL. This trimmer is designed around a lightweight package — just 7 lbs with the included 4 Ah battery — so you can work all afternoon without feeling it. The 40‑volt motor is surprisingly punchy, and the Power Boost button delivers an extra 20 % of torque when you hit a patch of heavy weeds or brambles. The straight shaft and 16‑inch cutting width make it easy to reach under bushes and along fences, while the Dual‑Direction head lets you spin the cutting direction horizontally or vertically for precise edging.
Owners love the quiet operation and instant start. The variable‑speed trigger is smooth, and the intuitive touchpad controls with LED indicator make operation foolproof. The included battery and charger are both fast and compact, and the battery is compatible with all of Husqvarna’s 40‑volt handheld tools — a great benefit if you plan to expand your cordless ecosystem.
The biggest concern reported by long‑term users is the trimmer head. A number of owners say the stock head fails to feed trimmer line reliably after a few uses, leading to frustration. Some solved the problem by installing an aftermarket head (which requires a small modification). Others reported issues with the shaft loosening after months of use. If you get a well‑built unit, this trimmer is a joy to use; but the variability in head quality is worth noting before you buy.
What works
- Very light weight — one of the easiest to maneuver all day
- Power Boost mode provides extra torque on demand
- Dual‑Direction head simplifies edging and prevents debris scatter
- Quiet operation and premium feel
What doesn’t
- Stock trimmer head has reliability issues with line feed
- Shaft can develop a wobble over time if not tightened properly
- Battery and charger cost extra if you buy the tool‑only version
4. Greenworks 40V 15″ Cordless String Trimmer (ST40B213)
Greenworks has built a strong reputation for delivering solid battery‑powered tools at accessible prices, and the ST40B213 continues that tradition. This trimmer uses their 40‑volt system with a brushless motor that provides 30 % more torque than their previous generation, thanks to the TorqDrive system. It spins a dual .085‑inch line across a 15‑inch cutting path, which is enough for normal grass and moderate weeds. The bump‑feed head is simple and effective — just tap on the ground to advance line — and the variable‑speed trigger lets you dial in the power.
What stands out in owner reports is the combination of power and value. Many users note that this trimmer handles everything a typical suburban yard can throw at it, including thick fescue and blackberry vines, with no bogging. The lightweight design (around 7 lbs) and adjustable assist handle make it comfortable for most users. The push‑button start is as simple as it gets, and there’s no gas, no pull cord, and no messy mixing.
The most common criticism is run time. The included 2.0 Ah battery lasts only about 20–30 minutes of continuous heavy trimming, which is fine for a small lawn but frustrating for larger properties. Many owners quickly invest in a higher‑capacity 4.0 Ah or 5.0 Ah battery to extend their work window. Also, the 15‑inch cutting width is a bit narrow compared to rivals, meaning more passes to cover the same area. Still, for someone on a tighter budget who wants brushless performance, this is a very compelling option.
What works
- Excellent value for brushless power at a mid‑range price
- TorqDrive motor punches above its weight against thicker weeds
- Lightweight and easy to handle for all ages
- Compatible with Greenworks 40V battery platform (mowers, blowers, etc.)
What doesn’t
- Included 2.0 Ah battery provides only 20–30 minutes runtime
- 15″ cutting width is narrower than many competitors
- Charging the battery takes a few hours
5. WORX 3‑in‑1 Cordless String Trimmer (WG173)
The WORX WG173 is a clever 3‑in‑1 machine that switches between a string trimmer, a wheeled edger, and a mini‑mower. While only a 20‑volt tool, WORX’s brushless motor is tuned for efficiency, and the 4.0 Ah Power Share PRO battery extends runtime by 30 % over previous models. The 13‑inch cutting diameter is small, but the dual .065‑inch line spins fast enough for typical lawn grass and light undergrowth. The adjustable head pivots 90° for edging, and the included wheels let you roll the trimmer along sidewalk edges for a clean line without bending.
What owners appreciate most is the Command Feed system — pressing a button on the handle advances the line exactly as much as you need. No bumping, no trips back to the spool. The telescopic shaft and adjustable auxiliary handle make it easy to dial in a comfortable fit. At just 6.62 lbs, it’s one of the lightest in this roundup, and the Power Share platform means the same battery works with 140+ WORX tools.
The main trade‑off with the WG173 is power. It simply won’t cut heavy brush or tall, thick weeds as effectively as the higher‑voltage models. Owners who try to push it into dense growth find the motor bogs down and the line wears quickly. The small spool also requires more frequent line changes. Additionally, a few owners noted that the charger can deplete the battery if left plugged in for days after charging — an odd quirk that’s worth knowing. For small, well‑maintained yards, however, this combination of versatility, weight, and convenience is hard to beat.
What works
- Lightweight and well‑balanced, great for small properties
- Command Feed button is cleaner than bump feed
- Converts to wheeled edger and mini‑mower for versatile use
- Interchangeable battery with large WORX platform
What doesn’t
- Limited power — struggles with heavy weeds and overgrowth
- Small spool means frequent line replacement
- Charger may slowly drain battery if left connected
6. Greenworks 48V (2×24V) Electric Lawn Mower Combo Kit
For homeowners who need a complete lawn‑care solution, the Greenworks 48V combo kit is a turnkey package. It includes a 20‑inch steel‑deck push mower, a 12‑inch string trimmer, a 320 CFM variable‑speed blower, three batteries (two 4.0 Ah and one 2.0 Ah), and two chargers. The mower uses two 4 Ah batteries in series to generate 48 volts, producing up to 3,250 RPM at the blade. The trimmer is adequate for light trimming, and the blower is surprisingly capable with its variable‑speed nozzle. Everything is backed by a three‑year warranty.
Owners who made the switch from gas are consistently impressed with the quiet operation and instant start of the whole system. The mower’s single‑lever height adjustment (7 positions) and foldable handle for vertical storage make it convenient to store in tight spaces. The trimmer uses a bump‑feed head and an adjustable handle, while the blower offers two speeds. The fact that all three tools share the same 24‑volt batteries (arranged in different configurations) simplifies charging and management.
The downside is that the individual tools are not the top performers in their respective categories. The trimmer’s 12‑inch cutting width is small, and its power is only adequate for light grass. The mower can handle moderate lawns, but if you have thick St. Augustine or wet grass, you may need the turbo mode and a careful pace. The batteries are also relatively small — the mower runtime is about 30 minutes with fresh 4 Ah batteries, and the trimmer’s 2 Ah pack runs out quickly. You may need to buy additional high‑capacity batteries for larger lawns. This kit is a great value if you need every tool and are willing to accept “good enough” performance across the board.
What works
- Everything you need to maintain a lawn in one box
- Excellent value compared to buying each tool separately
- Zero emissions, low noise, and essentially no maintenance
- 3‑year warranty adds peace of mind
What doesn’t
- Trimmer is underpowered for anything beyond light trimming
- Mower runtime is limited with the included batteries
- Replacement batteries are costly
7. Xinweilan Electric Weed Wacker (Stringless, with 3 Blades)
The Xinweilan is the entry‑level pick that proves you don’t need to spend big money to handle a small yard. This cordless “stringless” trimmer uses a 21‑volt battery to spin a head that accepts three types of blades: plastic for gentle grass trimming, stainless steel for bigger weeds, and a manganese steel circular saw blade for thick brush. It weighs just 3.28 lbs — the lightest in this comparison — and the telescopic pole extends from 34.6 to 47.2 inches to suit different heights. The rotating head (0–90°) lets you edge along walkways easily.
Owners who have used it on small properties are genuinely impressed with the cutting ability for the low cost. The plastic blade handles open grass without issue, and the stainless steel blade chews through vines and briars that would stall a 20‑volt string trimmer. The double‑safety start switch and splash guard are nice touches. The two included 2.0 Ah batteries provide enough runtime to finish a small yard.
However, this is not a heavy‑duty tool. The 6‑inch cutting width means you’ll walk many more passes than with a 15‑inch trimmer. The aluminum shaft can break at the connection point under stress — a few owners reported this happening, though the warranty covered it. The blade bolt also tends to loosen during use, so you need to check and tighten it periodically. For occasional trimming on a tiny lot, the Xinweilan offers incredible value, but it will frustrate anyone with serious weed‑whacking needs.
What works
- Unbeatable weight — under 3.5 lbs makes it effortless for anyone
- Three blade types provide surprising versatility for the price
- Two batteries included to extend work time
- Very low cost to try battery‑powered trimming
What doesn’t
- Narrow 6″ cutting width is very slow for larger areas
- Aluminum shaft can break under heavy use
- Blade loosening is a recurring annoyance
- Less powerful than conventional string trimmers at similar price
Hardware & Specs Guide
Battery Voltage & Runtime
Voltage directly influences how much power the motor can produce. 20 V trimmers (like the WORX) are fine for light trimming, while 40 V, 56 V, and 60 V tools cut through thick weeds with authority. Battery capacity (Ah) determines how long you can work. A 4 Ah battery at any voltage will generally run 30–60 minutes depending on load. Always consider the brand’s battery platform — sticking with one ecosystem allows you to share batteries across tools, reducing long‑term cost.
Cutting Width & Line Options
Wider swaths (15–17 in) cover ground faster but require more power to spin. Thicker line (0.080–0.105 in) handles dense growth, while thinner line (0.065 in) is lighter on the motor and better for delicate edging. Some trimmers accept multiple line diameters, and a few models offer adjustable swath settings. Also note: stringless designs use rigid plastic or metal blades — they cut differently and can be more durable but may damage hard surfaces.
Feed Mechanism Types
Bump feed (tap head on ground) is the oldest and still very reliable. Automatic feed (Line IQ on EGO) senses line length and feeds as needed — no stopping, but adds weight and complexity. Button feed (Command Feed on WORX) lets you advance on demand without bumping. Manual winding heads require you to remove the spool and wind by hand. Choose based on your patience mid‑task.
Shaft & Weight
Straight shafts are standard for reach under shrubs and edging, while curved shafts lower the center of gravity for easier swinging. Material matters: steel shafts are heavy but cheap; aluminum is lighter; carbon‑fiber (EGO) is the lightest and strongest. Total weight with battery ranges from under 4 lbs to over 15 lbs. Heavier trimmers can fatigue the user quickly, especially for those with a weak grip or shoulders. A harness can offset the weight of heavier models.
FAQ
What voltage battery is best for a cordless string trimmer?
Is a brushless motor worth the extra money?
How much should I expect to spend on a capable cordless trimmer?
Can I use the same battery across multiple brands?
Final Thoughts: The Verdict
For most gardeners who want a blend of power, innovative features, and long‑term reliability, the winner for the best cordless string trimmer is the EGO Power+ ST1623T because it combines gas‑like cutting force with fuss‑free auto‑feed and excellent build quality. If you need attachment compatibility and already own DEWALT tools, the DEWALT DCST972X1 is a close second. And for those on a budget who still want brushless performance, the Greenworks ST40B213 offers the best value without sacrificing cutting ability.