The best battery string trimmers for large yards are not the ones with the biggest number printed on the side. They are the machines that pair a wide cutting swath with enough real trigger time to finish a fence line before the battery gives out. On a property of an acre or more, those two numbers decide how many passes you make, how many packs you cycle through, and whether you finish the job or start it again next weekend.
That is the part most roundups skip. Manufacturer runtime figures assume light trimming at a low speed setting, and the gap between that number and what you get cutting waist-high grass along a property line is where buyer disappointment lives. One Chronicle Forums user running a Greenworks battery trimmer put it plainly: the pack lasts about 30 minutes, so they own two. That is a realistic operating pattern, and it is the one this guide is built around.
We spent October 2026 reading the spec sheets, warranty terms and owner reviews behind all ten machines below, then cross-checked them against the questions people actually ask on forums like r/lawncare and r/Greenworks. The result is a lineup that spans 40V to 80V, 6.4 to 18.7 pounds, and 13 to 16 inches of cutting swath, sorted by the property size each one suits.
If you are still working out the basics, our cordless string trimmer guide for lawns covers the smaller-property end of the range, and our battery mower picks for front yards handle the turf. This page is for the acreage, fence lines and overgrown edges that a mower cannot touch.
Table of Contents
Top 3 Best Battery String Trimmers for Large Yards in 2026
Our three headliners cover three different large-yard needs: the all-round pick, the widest swath per pass, and the multi-tool kit. Ratings and review counts below come straight from the published customer data, not from our own scoring.
EGO POWER+ ST1521S 15 inch
- POWERLOAD automatic line loading
- Carbon fiber split shaft
- 56V 2.5Ah battery included
- 5-year tool warranty
EGO POWER+ ST1623T 16 inch
- Line IQ auto-sensing head
- 16 inch cutting width
- Up to 60 minutes runtime
- Telescoping carbon fiber shaft
EGO Power+ MST1501 Combo Kit
- 56V 5.0Ah battery included
- Rapid Reload head with 0.095 inch line
- Multi-Head attachment system
- 45 minutes runtime
All 10 Trimmers Side by Side in 2026
Every pick appears below with its platform, swath and the detail that actually changes how it performs on acreage. Features are taken from the manufacturer data for each machine.
| Product | Specifications | Action |
|---|---|---|
| EGO POWER+ ST1521S 15 inch String Trimmer Kit |
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Check Latest Price |
| EGO POWER+ ST1623T 16 inch Cordless Weed Trimmer |
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| EGO Power+ MST1501 Multi-Head Combo Kit |
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Check Latest Price |
 Greenworks 80V 16 in Trimmer and 500 CFM Blower Combo |
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 Greenworks 80V 16 in Cordless String Trimmer ST80L210 |
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 DEWALT DCST970B 60V MAX FLEXVOLT Trimmer |
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 Milwaukee 2825-20ST M18 Brushless Trimmer |
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Check Latest Price |
 Greenworks 60V 16 in Cordless String Trimmer ST60L413 |
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Check Latest Price |
 CAT DG610 60V 15 inch Brushless Trimmer |
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Check Latest Price |
 WORX WG183 40V 13 inch Cordless Trimmer |
|
Check Latest Price |
1. EGO POWER+ ST1521S 15 Inch String Trimmer Kit – Best All-Round for Big Yards
EGO POWER+ String Trimmer, Battery Powered, 15″ Trimmer for Weeds and Grass with POWERLOAD and Carbon Fiber Split Shaft, Includes 56V 2.5Ah Battery and Charger – ST1521S
56V brushless platform
15 inch class with 14 inch cutting width
7.3 pounds
2.5Ah battery and charger included
Pros
- POWERLOAD winds line at the push of a button
- Carbon fiber split shaft carries a lifetime warranty
- Lightest full-size machine here at 7.3 pounds
- 5-year tool warranty
Cons
- Included 2.5Ah pack is the smallest in the 56V range
- Line and accessories cost extra beyond the included spool
This is the trimmer I would hand to a homeowner with two or three acres who already knows what a gas trimmer feels like and does not want one. At 7.3 pounds it is one of the lightest full-size machines in the lineup, and the carbon fiber split shaft is the kind of component that still feels solid in year five.
The line handling is the standout. POWERLOAD takes the spool, feeds the line into the head and winds it to length at the press of a button. On a big property you will change line constantly, because fence lines chew through nylon, and a button beats spool threading every single time.
Motor speed is listed at 5800 rpm, which is enough to move through ordinary grass and weed growth without bogging. The trimmer ships with a 56V 2.5Ah battery, a standard charger, cutting line and a hex wrench, so nothing else needs buying before the first pass.
The honest limitation is the 2.5Ah pack. It is the smallest battery in the 56V range, and owners consistently note that heavy multi-acre work runs out of it before the job does. Buy a higher-capacity pack as your second battery, or plan your sessions around the smaller one.
How it holds up on a large property
At 7.3 pounds with a balanced split shaft, this is the machine least likely to end your session early because your shoulder hurts. For fence lines and open grass on properties up to about two acres, the light weight matters more than raw voltage.
Charging is fan-cooled to keep the battery and charger from overheating, and the 2.5Ah pack takes about 50 minutes. Plan on two packs for anything approaching an acre of continuous trimming.
Where it falls short
The listed cutting width is 14 inches on a 15 inch frame, which is narrower than the 16 inch machines here. You will make more passes across open ground than an owner of a 16 inch head would.
If your property is dominated by saplings, heavy bramble or brush beyond line capacity, the 56V platform is not the strongest tool in this group. A 60V or 80V machine is the better tool for reclamation work.
2. EGO POWER+ ST1623T 16 Inch Cordless Weed Trimmer – Widest Swath in the Lineup
EGO POWER+ 16″ Cordless Weed Trimmer with Battery and Charger – ST1623T
56V brushless platform
16 inch cutting width
7.5 pounds
4.0Ah battery and 320W charger included
Pros
- Line IQ head keeps a continuous 16 inch swath
- Highest review count in this roundup at 2270
- Telescoping carbon fiber shaft fits different operators
- Variable speed selector for thick or light work
Cons
- Roughly 60 minutes per 4.0Ah charge
- so spares are still needed
- Speed selector needs trigger discipline for full output
Swath is the metric that pays off most on open ground, and this machine has the widest cutting width of the EGO trimmers in our lineup at 16 inches. Every extra inch of width is another pass you do not have to make across a driveway edge or an open field margin.
Line IQ is the feature that separates this head. It auto-senses and feeds line to hold that 16 inch path continuously, so you are not stopping every few minutes to bump the head against the ground and wait for line to spool out. On a long fence line, that interruption adds up quickly.
Power comes from a high-efficiency brushless motor running 0 to 4900 rpm on low and 0 to 6200 rpm on high. The telescoping carbon fiber shaft adjusts to your height, which matters when two people share the tool on a big property.
The included 4.0Ah battery and 320W charger give roughly 60 minutes of runtime, and the pack takes about 55 minutes to recharge. A digital variable speed selector lets you dial back for edging work around shrubs and landscaping.
What makes it work for big yards
With 2270 reviews behind it, this is the most widely used battery trimmer on our list, and owner feedback is consistent about why: the 16 inch head and POWERLOAD winding let you clear ground fast without babysitting the line.
It accepts 0.095 inch dual-color pre-cut line, which is the diameter most owners end up running anyway. That gives you more cutting bite per pass than the 0.080 inch setups on the budget machines.
Where it falls short
Sixty minutes is a rated figure under light duty, and thick growth shortens it. On five acres of weedy perimeter work you will still need a second pack, and the cost of that pack is the number most buyers underestimate.
It is a trimmer, not a brush cutter. Bramble, woody saplings and overgrown lots are outside what the line and the 56V motor are meant to take.
3. EGO Power+ MST1501 Multi-Head Combo Kit – One Battery Platform, Four Tools
EGO Power+ MST1501 Multi-Head Combo Kit: 15-Inch String Trimmer & Power Head with 5.0Ah Battery & Charger Included
56V multi-head system
15 inch STA1500 trimmer attachment
12 pounds as shipped
5.0Ah battery and charger included
Pros
- Largest included battery here at 5.0Ah with about 45 minutes rated
- Trim attachment pre-wound with 0.095 inch dual-twist line
- Tool-free swaps to edger
- pole saw and hedge trimmer
- IPX4 weather-resistant construction
Cons
- Heavier and back-loaded once the 5.0Ah pack is fitted
- Edger and other attachments are a separate purchase
- Smaller debris guard on some production runs
This kit scores highest in the group at 4.6 stars across 1006 reviews, and the reason is the largest battery it ships with. A 56V 5.0Ah pack in the box changes the conversation about runtime before you have spent anything on extras.
The trimmer attachment itself is a 15 inch STA1500 unit, and it arrives pre-wound with 0.095 inch dual-twist professional grade line on a Rapid Reload head. That is a serious line diameter for a battery machine, and it is the one most owners find they were missing on cheaper kits.
Owners converting from gas tend to describe the brushless power head in the same breath: equivalent torque, low vibration, and a pack that outlasts the work session. That combination is why the rating sits where it does.
Why the multi-head design earns its place
The PH1400 power head drives the trimmer attachment tool-free, and the same head works with an edger, hedge trimmer, pole saw and the EP7500 extension pole. If you already own other EGO tools, this is the cheapest way into the platform.
IPX4 weather resistance matters on a large property where a spring storm can arrive mid-job. The adjustable front handle and carbon fiber shaft keep the machine manageable at 12 pounds.
Where it falls short
Twelve pounds with the 5.0Ah pack fitted makes it the most back-loaded machine here, and that is where shoulder fatigue starts on a long session. Several owners point out that the kit includes only a trimmer and power head, so an edger means another purchase.
A smaller guard on some newer production throws clippings back toward the operator, which is a safety consideration for anyone working near a road or a driveway.
4. Greenworks 80V Trimmer and 500 CFM Blower Combo – Two Tools on One Battery
Greenworks 80V 16 in String Trimmer & 500 CFM Blower Combo, 2.0 Ah Battery
80V brushless platform
16 inch cutting width
21.9 pounds for the full combo
2.0Ah battery included
Pros
- Highest voltage platform in this roundup
- Matching 500 CFM blower clears cut grass and leaves
- 16 inch dual line path covers ground quickly
- No gas
- oil or emissions to maintain
Cons
- 2.0Ah pack gives about 30 minutes
- the smallest here
- Blower uses a plastic housing rather than a metal fan
- Trimmer is bundled with the blower
Cutting a two-acre property is only half the job. The other half is blowing every bit of clipped grass and leaf off the beds, fences and hard surfaces, and this is the only bundle in the lineup that solves both on one battery platform.
The trimmer side is a 16 inch brushless machine on the 80V platform, the highest voltage here, with a 0.080 inch dual line bump feed head. The blower delivers 500 CFM at 125 MPH across three speeds plus a Turbo setting.
The 80V brushless motor provides more torque and longer motor life than a brushed equivalent, and owners on r/Greenworks report running this platform in the field without trouble. That is a platform with an actual installed base, not a spec-sheet experiment.
Be clear about the weight: 21.9 pounds is the combined figure for both tools plus the battery, so the trimmer on its own is considerably lighter to carry.
What makes it work across a whole property
One battery platform running both a trimmer and a blower is the efficiency argument that gas cannot match. You finish the cut, swap the pack, and clear the debris without starting a second machine or refuelling anything.
Nothing on either tool needs oil, fuel or emissions service, which is the quiet advantage for someone running a property on a weekly schedule.
Where it falls short
The included 2.0Ah battery gives about 30 minutes and is the smallest pack on this platform, so most owners add a higher-capacity battery. Thirty minutes is a short working block for anything past a quarter acre.
The blower is a plastic-housing design rather than the metal fan you would want as a primary leaf tool, and buying the trimmer alone means searching out a different variant.
5. Greenworks 80V ST80L210 16 Inch Trimmer – Straight Power, No Extra Hardware
Greenworks 80V 16 in Cordless String Trimmer, 2.0 Ah Battery
80V brushless platform
16 inch cutting path
16 pounds
6500 rpm, 2.0Ah battery included
Pros
- 80V brushless power cuts heavy grass and light saplings
- Owners report a quarter acre plus edging on one charge
- Variable speed trigger for working around shrubs
- Fast 30 minute charging on the 2.0Ah pack
Cons
- Bump feed head has a reputation for unreliable line advance
- 0.080 inch line wears fast along fences and edges
- No shoulder strap or harness included
This is the trimmer on its own, without a blower, for people who already have a way to clear debris. At 4.2 stars across 1880 reviews it is the most heavily reviewed 4.2-rated machine here, and the review split tells you exactly where the value is and where the complaints sit.
Owners love the power. The 80V brushless motor runs at 6500 rpm and cuts heavy grass, and one user reports finishing a quarter acre plus all their edging on a single charge. Several describe it as noticeably lighter than a comparable gas trimmer.
The complaints are specific and consistent. The bump feed head does not always advance line on demand, which forces manual spool changes mid-job. The supplied 0.080 inch line wears quickly along chain-link fence, where the line is constantly dragged sideways across wire.
There is no shoulder strap or harness included, and on a 16 pound machine that is a real omission for anyone working a full day. The older design also lacks a head-reverse feature, and the debris guard does little to stop clippings.
What it does well on big properties
Raw cutting power is the argument. If your property has sections of heavy, wet grass or light sapling growth that stall a 40V machine, this is the class that pushes through without bogging.
Variable speed trigger control lets you back off around perennial beds and shrubs without stopping, and the battery cross-compatibility across the Greenworks 80V line means one pack can run other tools.
Where it falls short
The head and the line are the weak points. Running heavier 0.095 or 0.105 line is the fix many owners report transforming the machine, but only if the head is designed to handle it.
If the motor bogs with too much line protruding, the usual cause is overloading the spool rather than a power shortage. Learning to bump correctly takes a few passes.
6. DEWALT DCST970B 60V MAX FLEXVOLT – Best With High-Capacity Batteries
DEWALT DCST970B FLEXVOLT 60V MAX Cordless String Trimmer, Tool Only
60V MAX FLEXVOLT platform
15 inch cutting swath
12 pounds
Tool only, battery and charger sold separately
Pros
- FLEXVOLT platform accepts packs up to 15Ah for long sessions
- Two speed control for deep weeds or delicate edging
- Quieter and lower vibration than a gas engine
- Spool clears and refills more easily than most rival heads
Cons
- Tool only
- so battery and charger are extra purchases
- Intake screens can clog with clippings and overheat the motor
- About 30 to 45 minutes on 6.0Ah packs
Volts do not determine cutting power on their own, but battery capacity options absolutely determine how long you can work. The 60V MAX FLEXVOLT platform accepts packs up to 15Ah, and no other platform here gives you that much headroom for all-day trimming.
Owners running 10Ah and 15Ah packs report trimming very large lawns on a single charge and preferring the machine to gas for the noise and vibration difference alone. A 60V FLEXVOLT battery also powers 20V MAX tools, so the platform investment covers more than your yard gear.
The trimmer itself is a two-speed, 15 inch swath design that accepts 0.080 inch line, and the spindle converts to a saw blade or other attachments with a simple swap. A three-year limited warranty covers the tool.
One issue shows up in the reviews more than once, and it is worth knowing before you buy: the cooling air intake sits low near the cut zone, and clogged screens have been linked to premature motor failure. Check the screen periodically in tall grass.
Why the battery options matter most here
At roughly 30 to 45 minutes on a 6.0Ah pack, a single smaller battery is not an all-day solution. But the same tool runs considerably longer on a 15Ah, and that is the difference between trimming an acre and finishing five.
For someone who already owns FLEXVOLT packs, this is the cheapest path to a capable trimmer, and the two-speed control handles both deep weed cutting and careful edging on the same machine.
Where it falls short
It ships as a bare tool. If you have no DEWALT battery or charger, budget for both before the first use, which changes the total cost of this pick considerably.
The 15 inch swath is narrower than the 16 inch machines here, and the battery release latch is light-duty plastic, which is a component worth treating gently on a job site.
7. Milwaukee 2825-20ST M18 Brushless – Best for Existing M18 Owners
Milwaukee 2825-20ST 18V Cordless Brushless String Grass Trimmer with Attachment Capability (Tool-Only)
18V M18 platform
14 to 16 inch adjustable swath
12.7 pounds
Brushless power head, tool only
Pros
- Attachment capability covers edging
- hedge trimming and pole work
- Easy-load head simplifies line changes
- Accepts 10.0Ah and 12.0Ah High Output packs
- Professionals report matching their gas equipment
Cons
- Tool only
- batteries and charger sold separately
- Heavier and bulkier than most rivals
- Debris guard does not stop all flying clippings
The 18V M18 platform is the lowest nominal voltage in this roundup, which matters less than the marketing might suggest. A brushless power head on High Output packs performs in the field well beyond what the platform number implies, and landscape professionals running 12.0Ah packs report matching their gas equipment job for job.
The real advantage is reach. This is an attachment-capable power head, so one battery and one motor cover trimming, edging, hedge trimming and pole saw work. If you already own Milwaukee tools, this is a straightforward addition rather than a new platform.
Speed range is 0 to 4900 rpm on low and 0 to 6200 rpm on high, cutting swath adjusts from 14 to 16 inches, and it takes 0.080 or 0.095 inch line. The Milwaukee easy-load head simplifies line changes, which is one of the few things that consistently appears on owners’ must-have lists in the forums.
Skepticism about cordless trimmers is still common on r/MilwaukeeTool, and most of it comes from owners who have not tried a brushless head on a large pack. The 759 reviews here average 4.4 stars with 74% five-star ratings.
Why it works on a big property
High Output packs are the answer to the runtime objection. Owners running a full day of lawns report using only part of one 12.0Ah pack, which changes the pack count from the buyer perspective.
The 0.095 inch line capability lets you run heavier line for fence lines and light brush, and the adjustable swath means you can narrow down for planting beds and open up for open ground.
Where it falls short
At 12.7 pounds it is among the heavier machines here, and it is bulkier than most competitors. Long sessions without a strap are where that weight shows up, and no harness is included.
The debris guard does not stop all flying clippings, so eye and leg protection remain necessary. One isolated report describes a motor lock after about two years, which is a single data point rather than a pattern, but it is worth noting on a tool-only purchase.
8. Greenworks 60V ST60L413 16 Inch Trimmer – Shoulder Strap Included
Greenworks 60V 16 in Cordless String Trimmer, 4.0 Ah Battery
60V brushless platform
16 inch cutting width
18.7 pounds
0.095 inch Load N Go head, strap included
Pros
- Adjustable shoulder strap ships in the box
- rare at this class
- 0.095 inch dual line and fast Load N Go head
- Attachment-capable shaft for pole saw and hedge work
- 4-year limited warranty on tool and battery
Cons
- Heaviest bare tool here at 18.7 pounds
- Awkward to control precisely around perennial beds
- Included charger runs loud
- Not a substitute for a brush cutter
This is the only machine in the lineup that ships with an adjustable shoulder strap in the box, and on an 18.7 pound tool that detail matters more than any spec line. Heavy-session fatigue is the top complaint from large-property users, and a strap is the cheapest fix available.
The head is a Load N Go design that reloads faster than manual spool winding, pre-loaded for 0.095 inch dual line. That is a heavier line than most 60V machines in this class ship with, and it is the right starting diameter for fence lines and taller grass.
Owners report roughly an hour of trimming on low speed with the included 4.0Ah battery, and one user calls it comparable to a 25cc gas trimmer. The shaft is attachment capable for pole saw, hedge trimmer and edger work, and it carries a four-year limited warranty on both tool and battery.
The review pool is small at 169 reviews, but the sentiment is unusually consistent for a newer listing: strong on power-to-value, battery endurance and the included strap, with complaints focused on bulk rather than output.
Its category sales rank is strong, which tells you the machine is moving in volume even though the review base is young. That combination usually means the long-term record is still being written.
What it handles well on larger lots
At 10000 rpm with 0.095 inch line and a 16 inch path, it covers ground quickly and has the head design to feed line when the job demands it. Attachment capability extends its reach into hedge and pole work without a second motor.
Compatibility with more than 75 Greenworks 60V products means the battery is useful across a wide range of yard equipment, not just this trimmer.
Where it falls short
Eighteen point seven pounds makes it the heaviest bare tool here, and the strap, while included, is doing real work on that weight. Some users find it awkward to control precisely around perennial beds.
The included charger runs loud, and one owner reported a faint burning smell during charging. It is not a land-clearing tool; true brush work needs a dedicated brush cutter.
9. CAT DG610 60V 15 Inch Brushless Trimmer – Lightest 60V Machine Here
Cat® DG610 60V 15” Brushless String Trimmer Cordless with Dual Line Bump Feed Head, Edger with Quick Line Load, Weed Trimmer with ECO Mode for Extended Runtime – Battery & Charger Included
60V brushless platform
15 inch cutting swath
9.9 pounds
ECO mode, battery and charger included
Pros
- Brushless Motor 2.0 gives 40 percent more power than standard brushless
- ECO mode roughly doubles usable time on light trimming
- Quick Line Load spool takes 0.095 inch line with no winding
- Lightest 60V machine in this roundup
Cons
- Lowest average rating here at 4.1 stars
- Shoulder strap not included despite the weight
- Some reports of units cutting out after startup
- Smallest installed base of the group
At 9.9 pounds, this is the lightest 60V trimmer in the lineup, and the balance and weight are what most owners mention first. Several describe it as well balanced, and one reports matching a Stihl gas trimmer through 10-inch grass and blackberry vines.
Brushless Motor 2.0 is the technology claim: 40% more power and 10% longer runtime than a standard brushless motor, running at 8000 rpm. The ECO mode roughly doubles usable work time on lighter trimming and edging, which is useful on a full-property sweep where most of the grass is not thick.
The Quick Line Load spool accepts 0.095 inch line with no manual winding, and the head is engineered to reduce centrifugal force so the machine stays balanced under load. The kit includes a 60V 2.5Ah battery and a 3A charger.
Here is the honest part. This is the lowest-rated machine in the roundup at 4.1 stars, and the distribution is the most polarized: 59% five-star but 10% one-star and 10% three-star. Complaints cluster around reliability, including a unit that powered down right after switch-on and a battery that lost capacity after a year.
Where the light weight pays off
Nine point nine pounds over a long fence line is the difference between finishing the property and stopping early. For an older operator or anyone working in summer heat, low mass is often worth more than extra voltage.
ECO mode is the underrated feature here. A lot of large-property work is light grass and edging, and the mode stretches the pack across exactly that work.
Where the risk sits
The review base is small at 134, so reliability claims rest on a handful of reports rather than a pattern. That is exactly the situation where buying from a brand with dealer support matters.
No shoulder strap is included, which is an odd omission on a machine whose selling point is weight. Expect to add one for long sessions.
10. WORX WG183 40V 13 Inch Trimmer – Lightest Machine, Narrowest Cut
Worx Cordless String Trimmer, 40V 13″ Electric Weed Wacker, WG183
40V PowerShare platform
13 inch cutting swath
6.4 pounds
Two 20V 2.0Ah batteries and dual charger included
Pros
- Lightest machine here at 6.4 pounds
- Two batteries plus a dual charger let packs charge in parallel
- Automatic-feed spool advances line without winding
- Adjustable auxiliary handle fits different operators
Cons
- 13 inch swath is the narrowest and least efficient
- 40V platform lacks the torque for thick brush
- No brushless motor
- Not attachment capable
We include this one to be straight with you about the bottom of the size range, because most people ask about it first. At 6.4 pounds it is the lightest trimmer in the lineup, and two 20V 2.0Ah batteries with a dual charger are the most generous battery package here for the money.
What you give up is capacity. The 13 inch swath is the narrowest on the list, and 40V sits well below the 60V and 80V platforms for torque. Reviewers consistently describe the cutting as underpowered for large properties and heavy weeds.
The dual-exit cutting head with an automatic-feed spool is a genuinely good design choice, and at 7000 rpm the head handles ordinary lawn edging and light grass without trouble. The adjustable auxiliary handle and streamlined body make it easy to work in tight spaces.
It sits on the PowerShare platform, which is shared across 20V and 40V tools, so the batteries are useful well beyond trimming. Note that it ships with a brushed motor, not brushless, which is where the longevity difference comes from.
When it is the right call
As a lightweight second trimmer for edging, around shrubs and in confined areas, it is hard to argue with. The two included batteries mean you are never waiting on a charge during a short session.
For a one-acre property that is mowed regularly and has thin fence lines, the 13 inch head is workable. The automatic-feed spool removes the most common complaint about cheap trimmers.
When it is the wrong call
For anything over an acre with thick growth, this is the wrong machine. You will make more passes than you need to, at a lower speed, and the motor will be working harder than a 60V or 80V platform would.
It is also not attachment capable, so it cannot grow into a multi-tool yard setup. Treat it as a light-duty complement to a mower rather than a large-property primary tool.
How to Size a String Trimmer to Your Acreage
Match the trimmer to the property, not the other way round. A 13 inch head on three acres means three times the passes of a 16 inch head for the same result, and the extra passes are where the runtime disappointments come from.
One acre or less. A 40V to 56V machine with a 13 to 15 inch swath handles mown regularly ground, lawn edges and short fence lines. One additional pack beyond the included battery covers most sessions. This is where the WORX and the lighter EGO machines fit.
One to three acres. You want 56V to 60V with a 15 to 16 inch swath and 0.095 inch line capability. Budget for two to three batteries total, and add a shoulder strap. The EGO ST1623T, the Greenworks 60V ST60L413 and the CAT DG610 all sit in this band.
Three to five acres. Fence lines, ditches and roadside verges dominate the workload. Go to 80V or a 60V platform with high-capacity packs, and run at least three batteries with rotation between them. The Greenworks 80V machines and the DEWALT on a 15Ah pack belong here.
Five acres and beyond, or farm and ranch work. Two packs is the bare minimum and three is realistic. Plan on rotation, not sequential charging, and treat line changes as part of the job rather than an interruption to it.
A rough trigger-time rule: assume roughly 20 to 30 minutes of real cutting per pack for heavy growth, and 40 to 60 minutes for light maintenance trimming on the higher-capacity packs. Multiply by the number of acres, then by a factor for obstacles and tight corners. That estimate is why Chronicle Forums users run two batteries, and why four is common on five-acre properties.
Buy the Battery Platform You Already Own
The most repeated question across the forums we read is not about brands at all. It is about the batteries already sitting in your garage. One r/lawncare user laid out the shortlist for a large property as the 20V DEWALT because they already owned 20V tools, the Ryobi 40V Expand-It, and the EGO 56V. That is the correct decision process.
Buying a second battery platform for one tool is the most common regret we see. Check what you own first, then choose within it if the tool is good enough. Adding a pack and a charger later costs more than picking the right platform on day one.
Where you have no existing platform, the two-pack platforms in this lineup offer the gentlest start. The EGO ST1623T and the ST60L413 both arrive with a 4.0Ah pack, which is a meaningful step up from a 2.0Ah.
Two ecosystems here cross over into other tool categories in a way worth knowing: a 60V FLEXVOLT battery also powers DEWALT 20V MAX tools, and the WORX PowerShare packs work across both 20V and 40V WORX products. Greenworks 80V and 60V packs stay within their own platforms, so mixing brands costs you more than it saves.
Bump Feed vs Rapid Load Heads and Line Diameter
Head type is the detail buyers skip and then regret. A bump feed head advances line when you tap it against the ground, which is simple and cheap but, in the reviews here, is the most common mechanical complaint on several machines. Rapid load, Load N Go and PowerLoad systems thread and wind the line by hand, taking a few seconds instead.
The forum advice is blunt on this. An AR15 forum post recommends the Quik-Lok version specifically because the standard head leaves a lot to be desired when loading. Across our ten picks, the machines with the most line complaints are the ones with basic bump feed heads, and the machines owners rate highest for line handling are the rapid-load designs.
On line diameter: 0.080 inch is the standard light-duty line and the fastest to feed. 0.095 inch is the sweet spot for battery trimmers on large properties, giving more bite per pass on fence lines and taller grass at an acceptable runtime cost. 0.105 inch belongs to brush cutter territory, not string trimmers.
Run heavier line only in heads designed for it. Several owners of the Greenworks 80V machines report that stepping up to a larger diameter transformed cutting performance, while others note their motor bogs when too much line protrudes. Check the head specification before you spool up heavier line.
When a Battery String Trimmer Is the Wrong Tool
There are properties where a cordless string trimmer is the wrong purchase, and saying so is more useful than another recommendation. If your land is dominated by woody growth, saplings or brush past line capacity, a brush cutter is the correct tool. A string trimmer is built to cut grass and weeds, not stems.
If the bulk of your acreage is rough mown ground rather than edges and fence lines, a walk-behind brush mower covers far more area per hour than any handheld trimmer. Ten models in this roundup are built for the last ten feet around a property, not for cutting a field.
For a very large rural property where you already have gas equipment, a second battery platform and four spare packs, cordless is a meaningful addition rather than a replacement. The honest answer from the forums is that battery trimmers win on noise, vibration, maintenance and start-up, and lose on uninterrupted session length. Plan around that rather than around marketing figures.
Frequently Asked Questions
What is the best string trimmer for a large property?
For properties of roughly one to five acres, a 56V to 60V brushless trimmer with a 16 to 17 inch cutting swath and at least two 4.0Ah-or-higher batteries is the right class. Among the models we cover, the EGO POWER+ ST1521S leads on all-round balance, the EGO ST1623T gives the widest swath, and the Greenworks 80V machines handle the heaviest growth. For five acres and beyond, add a third pack and use rotation rather than sequential charging.
What is the best battery operated string trimmer on the market?
There is no single winner for every buyer. The EGO POWER+ ST1521S leads on all-round balance at 4.5 stars across 2097 reviews, the EGO Power+ MST1501 combo kit rates highest at 4.6, and the DEWALT 60V MAX FLEXVOLT leads for anyone who can run high-capacity 15Ah packs. The best battery trimmer for a given buyer is usually the one that matches a battery platform they already own.
Which is better for a cordless trimmer, 20V or 40V?
For large yards, 40V is the better minimum. 20V trimmers typically carry a 12 to 14 inch swath and suit small lawns and light weekly edging. 40V and above give you a 15 to 17 inch swath, heavier line capability and enough torque for fence lines and tall grass. Beyond two acres of thick or weedy growth, step up to 56V to 60V. Remember that a 60V FLEXVOLT battery also powers DEWALT 20V MAX tools.
What are the best string trimmers according to consumer reports?
The models that recur across the most rigorous independent testing in this category include the ECHO 56V eForce, the DEWALT 60V MAX, the Milwaukee M18, the EGO Power+ 56V and the Husqvarna 525iLST and 320iL. For large properties the numbers that matter are verified runtime, swath width, line diameter capability and balance, rather than star rating alone.
How many batteries do I need to trim two acres?
Plan on three batteries total for two acres of moderate growth: the pack that ships with the tool plus two spares. At roughly 20 to 30 minutes of real trigger time per pack in heavy growth, that gives you a rotation where one pack charges while another is in use. On regularly mown ground you can get by with two, and on five acres or thick weeds, budget for four.
Final Verdict for Large Yards in 2026
The EGO POWER+ ST1521S is our pick for the best battery string trimmers for large yards overall. It carries the highest review count of any machine here at 2097, holds a 4.5 rating, weighs 7.3 pounds, and its POWERLOAD line system removes the single most tedious part of big-property trimming. If you already own EGO packs, that decision takes about five minutes.
For maximum coverage per pass, take the EGO POWER+ ST1623T with its 16 inch Line IQ swath and 4.0Ah pack. For the heaviest growth on the property, the Greenworks 80V machines run the highest voltage here, though you will want a bigger battery than the 2.0Ah they ship with.
Two picks deserve a specific mention. The Greenworks 60V ST60L413 is the only machine here that includes a shoulder strap, which on an 18.7 pound tool is worth more than an extra feature. And the DEWALT 60V MAX FLEXVOLT is the right answer for anyone already holding high-capacity FLEXVOLT packs, since the platform goes up to 15Ah.
Before you buy, count your batteries, measure how much of the property is edges and fence lines rather than open turf, and plan for a spare pack. That last step is what separates a trimmer that finishes the job from one that keeps stopping. For the turf side of the work, our battery mower guide covers the mown areas, and our battery hedge trimmer picks handle the shrubs and hedges that surround them.