Top 10 Battery String Trimmers — Best Overall + Best Value in 2027

1. EGO Power+ ST1623T

The ST1623T ranks first on the widest cut in the class paired with the lightest serious shaft: a 16-inch swath, a telescopic carbon-fiber straight shaft, and 10.2 pounds with the 4.0Ah battery. The 56V brushless motor drives 0.095-inch twisted line through pampas grass without bogging. Low speed stretches runtime past 45 minutes, and the Powerload head rewinds line at the push of a button.

This is the pick for a homeowner who wants one battery to run a whole yard system — the splined coupler accepts EGO pole saw, edger, hedge trimmer, brush cutter, blower, and cultivator heads. The trade is price: $349 as a kit, $90 more than the Ryobi RY40209VNM directly below, which offers the same attachment concept on a heavier aluminum shaft. Warranty is 5 years tool, 3 years battery.

2. Ryobi RY40209VNM 40V HP

Second place goes to the cheapest genuinely attachment-capable trimmer here at $259 with a 4.0Ah battery and charger. The 40V HP brushless motor spins a 15-inch cut with a 0.080-inch dual-line bump head, and runtime reaches 38 minutes on low. The straight aluminum shaft carries a splined coupler that accepts Ryobi's Expand-It heads — pole saw, edger, blower, cultivator, brush cutter, hedge trimmer.

Buy this if you own no battery platform yet, because the 40V line spans more than 80 Ryobi tools including a 42-inch zero-turn mower, all stocked at Home Depot. What you give up against the EGO above is refinement and weight: 11.4 pounds with the 4.0Ah pack, an inch less swath, and thinner line that works grass better than saplings.

3. Stihl FSA 60 R

Third on the strength of weight and build — 7.5 pounds without a battery makes it the lightest serious trimmer on this list. The 36V AK-system brushless EC motor drives a 14.6-inch swath with 0.080-inch line through a TapAction 2 bump head. The loop handle suits tight edging. Runtime is 30 minutes on the AK 30 pack and 60 minutes on the AK 50, with sealed bearings and glass-reinforced polymer housing.

This is the dealer-channel buy: 8,000-plus independent Stihl dealers handle setup and service, and registration extends the 2-year warranty to 3. The hard trade against the two picks above is versatility — no attachment coupler, so it stays a pure trimmer forever. Bare tool runs $259; the AK 30 and AL 101 charger kit is $399.

4. Husqvarna 525iLST 40V

Fourth for commercial-tier hardware: a 17-inch swath, the widest here, cutting 0.095-inch line through a brushless motor in a magnesium housing with IPX4 weather sealing. Three speed settings — savE, standard, boost — push runtime to 75 minutes on a BLi200 in savE mode. Weight is 10.4 pounds without battery, and the straight shaft accepts a bicycle handlebar for all-day work.

Municipal crews in noise-restricted European cities run these, which tells you the intended user: semi-pros and owners of large properties already on Husqvarna 40V. The cost is real — $349 bare, $499 with the BLi200 and charger, versus $349 all-in for the EGO at rank one. Warranty is 2 years residential, 1 year commercial.

5. Milwaukee 2828-21HD M18 FUEL

Fifth because its value is the battery, not the trimmer. The M18 FUEL brushless motor cuts a 16-inch swath with 0.095-inch line on a straight shaft, with a variable-speed trigger and a Quik-Lok head. Runtime hits 60 minutes on the HD12.0 pack in light cutting. The kit is $349 with the HD12.0 battery and Rapid Charger, and Milwaukee's 5-year tool warranty is the longest in the trade-tool class.

The buyer is a tradesperson already holding M18 drills, impacts, saws, and vacs — the same pack that runs an M18 table saw runs this. At 12.5 pounds with the HD12.0 it is the heaviest tool here and wants a shoulder strap, and there is no attachment coupler. If you are not on M18, the EGO and Ryobi above deliver more trimmer per dollar.

6. Greenworks 2110402 40V

Sixth overall and the Best Value pick: a brushless motor at $199 with a 2.0Ah battery and charger, which nothing else here matches. The 13-inch dual-line head runs 0.080-inch line with auto-feed, and the curved aluminum shaft keeps total weight to 6.8 pounds. Runtime is 35 minutes on the 2.0Ah pack. Warranty runs 4 years on the tool and 3 on the battery.

Aimed at first-time battery buyers with a quarter-acre yard, and the 40V platform covers 70-plus tools including a 21-inch self-propelled mower and a 730 CFM blower. The 13-inch swath is the cost — noticeably more passes than the 15-inch Ryobi above on a half acre. Against the Black+Decker below, the brushless motor is the difference in thick weeds.

7. Black+Decker LSTE525 20V MAX

Seventh as the ultra-budget entry: $149 with a 2.0Ah battery and charger, and 5.9 pounds with the battery installed — the lightest tool on this list. The 20V MAX brushed motor turns a 12-inch cut with 0.065-inch line through an EASYFEED auto-feed head, and the shaft telescopes. Runtime is 40 minutes on the 2.0Ah pack. The head flips 180 degrees into a wheeled walk-behind edger.

Right tool for a townhouse or patio owner with under 2,000 square feet of trim work, and the low weight suits smaller-frame users and seniors. The brushed motor is the honest trade — it bogs in dense vegetation where the brushless Greenworks above keeps cutting. Warranty is 2 years. Anything past a quarter acre outgrows it quickly.

8. DEWALT DCST972X1 FLEXVOLT

Eighth on raw torque: the 60V FLEXVOLT brushless motor cuts a 17-inch swath with 0.095-inch line, the closest gas substitute here for tough commercial-edge work. A high/low gear switch backs the variable-speed trigger, and the 3.0Ah FLEXVOLT pack delivers 55 minutes in low gear. The patented Quickload spool rewinds line in 30 seconds with no disassembly. Kit price is $329 with battery and charger.

This makes sense for someone already invested in FLEXVOLT, since the same pack runs a DeWalt table saw and chainsaw. Weight is 12.2 pounds with the battery, second heaviest here, and there is no attachment coupler. It matches the Husqvarna above on swath for $170 less than that full kit, but gives up weather sealing and the savE runtime mode. Warranty is 3 years.

9. EGO Power+ ST1502SA

Ninth because it is the flagship stripped down: same 56V brushless motor and same Powerload push-button rewind head, but a 15-inch swath instead of 16 and no attachment coupler. It runs 0.095-inch line on a straight shaft and weighs 9.4 pounds with the 2.5Ah pack, lighter than the ST1623T. Runtime is 45 minutes on the low setting. The kit is $269 with battery and charger.

For an EGO buyer who wants the Powerload head and nothing else, this saves $80 over the rank-one ST1623T. That gap is small enough that the single-purpose limitation is the whole decision — the 56V Arc-Lithium platform still reaches EGO mowers, blowers, chainsaws, and snowblowers, but this shaft will never take a pole saw. Warranty is 5 years tool, 3 years battery.

10. Toro 51840T Flex-Force 60V

Tenth on platform logic rather than standout specs. The 60V Flex-Force brushless motor cuts 14 inches with 0.080-inch dual-line auto-feed on a straight shaft, weighs 8.9 pounds with battery, and runs 40 minutes on the 2.5Ah pack. Bare tool is $179 — the cheapest serious-brand brushless entry here — or $299 with the 2.5Ah battery and charger. Warranty is 3 years tool, 3 years battery.

The case for it is one battery across the yard if you already own a Toro Recycler 21-inch self-propelled mower on Flex-Force. Without that mower the math falls apart: the 14-inch swath sits mid-pack, and the Toro tool lineup is far smaller than the Greenworks or Ryobi platforms above. At similar kit money, the $199 Greenworks gives more.

How we ranked these

Rankings weighted cutting power at 25% (motor watts, brushless vs brushed), real-load runtime at 20% on thick fescue and edging, cut width plus line diameter at 15%, ergonomics at 15% covering weight, balance and shaft type, attachment ecosystem at 10%, battery platform reach at 10%, and warranty plus parts availability at 5%. Inputs came from Wirecutter's 2026 guide, Project Farm's 12-tool shootout, Pro Tool Reviews bench data, Tool Box Buzz, and owner threads.

Deliberately ignored: peak amperage specs, because manufacturers compare them unfairly across voltage classes and the number tells you nothing about sustained torque. Also ignored "professional-grade" branding unbacked by a commercial warranty, and shaft material on residential tools — aluminum is fine, and carbon fiber only matters past roughly 45 minutes of daily use. Bare-tool prices were excluded from value scoring unless a kit price was also published.

What to look for

Cut swath decides time-to-finish more than any spec: a 16-inch head finishes a yard in roughly half the passes of a 13-inch. Line diameter decides what you can actually cut — 0.080-inch handles grass, 0.095-inch handles weeds and saplings. Above $200, brushless is non-negotiable. And watt-hours, not voltage, is the runtime number: a 40V 5.0Ah pack at 200Wh outlasts a 60V 2.0Ah pack at 120Wh.

The common mistake is buying voltage instead of platform. Buyers chase a 60V badge, then discover the battery fits one tool. Pick the ecosystem first — EGO, Ryobi 40V, Greenworks, Milwaukee M18 — because your second and third purchases ride on that pack. Second mistake: skipping attachment capability to save $80, then paying $200 for a standalone edger a year later. Also avoid heads with non-replaceable spools.

Related questions

How many batteries do I actually need for a half-acre yard?

Two. A single 4.0Ah pack gives 30 to 45 minutes of real cutting on low speed, and high speed cuts that to 15 to 25 minutes. Half an acre of edging and trim work regularly runs past a single charge. A second pack on the charger means you never stop mid-job, and it doubles as your mower or blower backup.

Is a carbon-fiber shaft worth paying extra for?

Only past about 45 minutes of daily use. Carbon fiber on the EGO ST1623T drops total weight to 10.2 pounds while staying rigid, which matters for landscapers and large-property owners running the tool for hours. For a quarter-acre homeowner doing 20 minutes a week, aluminum performs identically and costs less. Spend the difference on a second battery instead.

Why does the Greenworks win Best Value over the cheaper Black+Decker?

Motor type. The Greenworks 2110402 runs a brushless motor at $199; the Black+Decker LSTE525 is brushed at $149. Brushless runs cooler, lasts longer, and delivers more torque per watt-hour, so the Greenworks handles thick weeds the LSTE525 bogs on. Greenworks also backs it with a 4-year tool warranty against Black+Decker's two, on a 70-plus-tool platform.

Can a battery trimmer replace a gas trimmer in 2027?

For homeowner work, yes. EGO, Husqvarna, and DeWalt's 56 to 60V brushless trimmers match 25cc gas units on grass and light brush. Where gas still wins is all-day commercial brushcutting with 0.105-inch line — sustained runtime per dollar favors a tank of fuel over a wall of batteries. Most yards between a quarter acre and two acres never hit that ceiling.

What does attachment-capable actually get me?

A splined coupler that accepts pole saw, edger, hedge trimmer, brush cutter, cultivator, and blower heads on the same powerhead and battery. EGO, Ryobi Expand-It, and Stihl KombiSystem all use this. Ryobi's lineup alone spans 10-plus heads. It costs $50 to $100 more upfront and turns a $250 trimmer into a tool system worth well over a thousand.

Which trimmer is best for a smaller-frame user or a senior?

Weight ranks first. The Black+Decker LSTE525 is lightest at 5.9 pounds with battery, and the Greenworks 2110402 is 6.8 pounds with a curved shaft that eases wrist strain. If you need real cutting power at low weight, the Stihl FSA 60 R is 7.5 pounds bare with a loop handle. Skip the 12-pound Milwaukee and DeWalt.

Should I buy the Milwaukee if I already own M18 tools?

Yes, and mostly only then. The 2828-21HD runs on the same HD12.0 pack as your drills, impacts, and saws, which removes an entire battery purchase from the math. It also carries Milwaukee's 5-year tool warranty. But at 12.5 pounds with no attachment coupler, it loses to EGO and Ryobi on trimmer-specific merit alone.

Does bump-feed or auto-feed matter for long-term reliability?

It does. Bump-feed advances line when you tap the head on the ground — mechanically simple and proven durable. Auto-feed advances line off motor torque with no input from you, but Pro Tool Reviews teardowns and r/Tools owner reports both show the internal mechanism failing more often. EGO's Powerload sidesteps the argument by rewinding the spool at a button press.

FAQ

How long does a battery string trimmer run per charge?

Expect 30 to 45 minutes of real cutting per 4.0Ah pack on a brushless 40 to 60V trimmer in low speed. High speed drops that to 15 to 25 minutes. Husqvarna's 525iLST stretches to 75 minutes in savE mode on a BLi200. Plan on two batteries for any yard over a quarter acre.

Are battery trimmers as powerful as gas in 2027?

For homeowner use, yes. EGO, Husqvarna, and DeWalt's 56 to 60V brushless trimmers match 25cc gas trimmers on grass and light brush. For all-day commercial brushcutting with 0.105-inch trimmer line, gas still wins on sustained runtime per dollar. The gap has closed enough that noise-restricted municipal crews in Europe run Husqvarna 40V battery units.

What's the difference between bump-feed and auto-feed line heads?

Bump-feed advances line when you tap the head on the ground — proven reliable, but it requires you to tap. Auto-feed advances line automatically off motor torque, which is convenient, but the internal mechanism fails more often according to Pro Tool Reviews and Reddit r/Tools owner reports. Bump-feed is the safer long-term bet on a tool you plan to keep.

Should I buy attachment-capable or single-purpose?

Attachment-capable systems — EGO Multi-Head, Ryobi Expand-It, Stihl KombiSystem — cost $50 to $100 more upfront and accept pole saw, edger, cultivator, hedge trimmer, and blower heads. If you own a yard with trees or defined bed edges, buy it. If you have a flat quarter acre and no trees, single-purpose tools like the Stihl FSA 60 R or EGO ST1502SA save money.

What line diameter should I use?

Match it to what you cut. 0.065-inch suits light grass on small 20V tools like the Black+Decker LSTE525. 0.080-inch is the residential standard and handles grass plus moderate weeds. 0.095-inch twisted line cuts weeds, saplings, and pampas grass — it's what the EGO ST1623T, Husqvarna 525iLST, and DeWalt DCST972X1 ship with. Never exceed the head's rated diameter.

Does higher voltage mean longer runtime?

No — watt-hours do. Multiply voltage by amp-hours: a 40V 5.0Ah pack is 200Wh and outlasts a 60V 2.0Ah pack at 120Wh. Voltage signals power class, not endurance. 40V is residential, 56 to 60V is prosumer, 80V is semi-pro. Compare Wh when you're deciding between two kits at similar prices.

Is a 13-inch swath enough for my yard?

Under a quarter acre, yes — the Greenworks 2110402's 13-inch head is fine and its 6.8-pound weight is easier on the wrist. Past a quarter acre, the extra passes add up fast. A 16- or 17-inch head like the EGO ST1623T or Husqvarna 525iLST cuts your total trim time roughly in half on larger properties.

Which brand has the largest battery platform?

Ryobi's 40V line spans 80-plus tools including a 42-inch zero-turn mower, and it's stocked at every Home Depot. Milwaukee M18 is larger at 280-plus tools but skews toward trade tools rather than outdoor power. Greenworks 40V covers 70-plus tools including a 21-inch self-propelled mower and a 730 CFM blower at roughly half EGO's pricing.

Why does the EGO ST1623T cost $80 more than the ST1502SA?

The attachment coupler and one extra inch of swath. Both run EGO's 56V brushless motor and Powerload head. The ST1623T adds the splined coupler that accepts pole saw, edger, hedge trimmer, brush cutter, and cultivator heads, plus a 16-inch cut versus 15, and a carbon-fiber shaft. Only skip it if you're certain you'll never want attachments.

What should make me walk away from a trimmer entirely?

A non-replaceable spool head. When the head cracks around year three — and it will — the whole tool becomes scrap because you can't source the part. Also walk from brushed motors above $200, and from any brand claiming professional-grade without a commercial warranty backing the claim. Check parts availability before you buy, not after something breaks.

Sources

• https://www.nytimes.com/wirecutter/reviews/best-string-trimmer/
• https://www.protoolreviews.com/best-cordless-string-trimmer-reviews/
• https://www.consumerreports.org/home-garden/string-trimmers/
• https://www.homedepot.com/b/Outdoors-Outdoor-Power-Equipment-String-Trimmers/N-5yc1vZbx6f
• https://www.stihlusa.com/products/trimmers-and-brushcutters/homeowner-trimmers/fsa60r/
• https://www.husqvarna.com/us/lawn-garden/trimmers/
• https://www.egopowerplus.com/string-trimmers/
• https://www.tomsguide.com/best-picks/best-string-trimmers
• https://www.popularmechanics.com/home/tools/g20051013/best-string-trimmers/

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