Best Battery String Trimmer for Large Yards (2026)
Four battery trimming options compared by voltage, cutting width, weight, and warranty for large yards, plus who should skip each pick.
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Top picks at a glance
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- 1
Best OverallGreenworks 60V Combo9.6/10View on Amazon - 2
Best Lightweight TrimmerBlack+Decker LST140C9.4/10View on Amazon - 3
Best Folding TrimmerKOMASTY 20V Trimmer9.2/10View on Amazon - 4
Best Replacement LineDEWALT DWO1DT8029.2/10View on Amazon - 5
Greenworks 80V 16 in Cordless String TrimmerView on Amazon - 6
20V 12" Cordless String TrimmerView on Amazon - 7
12-Inch Cordless Grass Trimmer & EdgerView on Amazon - 8
Husqvarna 130L Gas String TrimmerView on Amazon - 9
Greenworks 60V 16 in Cordless String TrimmerView on Amazon - 10
MZK 20V 2-in-1 Pole Hedge Trimmer & Grass ShearView on Amazon
Trimming around fences, outbuildings, and garden beds on a large yard takes more power and runtime than quick suburban edging. Battery string trimmers now offer higher voltages, wider cutting paths, and automatic line management without gas engine maintenance or fuel mixing. Finding the best battery string trimmer for large yards depends on matching voltage, cutting swath, weight, and runtime to your acreage. Here we compare four options from Amazon listings, including 60V, 40V, and 20V battery platforms as well as replacement line, noting stated runtimes, cutting widths, weights, and warranties alongside what the listings do not state.
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Quick picks
- Best Overall Greenworks 60V Combo: Highest Acre Score here: 60V battery platform, 4.0Ah battery, 13 in cutting path, and a 4-year tool and battery warranty Check price on Amazon
- Best Lightweight Trimmer Black+Decker LST140C: Stated weight of 6.4 lb with a 40V battery, 13 in cutting width, and a 3-year limited warranty Check price on Amazon
- Best Folding Trimmer KOMASTY 20V Trimmer: Innovative shaft folds 180 degrees for compact storage, with two 2.0Ah batteries included Check price on Amazon
- Best Replacement Line DEWALT DWO1DT802: 225-foot spool of 0.080-inch replacement line for string trimmers rather than a complete tool Check price on Amazon
Our acreage picks
Greenworks 60V 13 in String Trimmer and 540 CFM Blower Combo (STBA60B412)
Cordless 60V string trimmer with a 13-inch cutting swath and a 4.0 Ah battery, bundled with a 540 CFM leaf blower.
Who it's for: homeowners with large yards who need 60V cutting power and want a matching 540 CFM blower to clear clippings after trimming.
Who should skip it: anyone seeking an ultra-light bare trimmer or those who already own a dedicated yard blower.
Read the full review
The Greenworks STBA60B412 pairs a 60V cordless string trimmer with a 540 CFM leaf blower, running on an included 4.0 Ah lithium-ion battery and charger. The trimmer features a 13-inch cutting path, a 6500 RPM motor, and a dual-line bump feed head loaded with 0.080-inch line. The accompanying blower delivers up to 140 MPH air speed. A 4-year limited warranty covers both tools and the battery. Note that the listing states an item weight of 22 pounds, which represents the entire boxed combo package rather than the bare trimmer alone.
Pros
- 60V battery platform with an included 4.0 Ah battery and charger
- 13-inch cutting swath with dual-line 0.080-inch bump feed
- Includes a 540 CFM leaf blower reaching up to 140 MPH
- 4-year limited warranty covering both the tools and battery
Cons
- Listing weight of 22 pounds reflects the combined package rather than the bare trimmer
- Single 4.0 Ah battery must be shared between the trimmer and blower
- Dual-line bump feed head requires manual line reloading when empty
- Listing does not state separate bare-tool weights for trimmer and blower
Black+Decker 40V MAX 13 in String Trimmer and Edger (LST140C)
Cordless 40V string trimmer with a 13-inch cutting width, automatic line feed, and a 3-year limited warranty.
Who it's for: property owners who want a lightweight 6.4-pound cordless trimmer with a 13-inch cut and a 3-year warranty for fence lines and garden borders.
Who should skip it: owners of extensive acreage who need multiple high-capacity batteries or heavy dual line for dense brush.
Read the full review
The Black+Decker LST140C is a 40V MAX string trimmer and edger featuring a 13-inch cutting width and PowerDrive high-torque transmission. It includes one 40V lithium-ion battery, a charger, an auxiliary handle, and an AF-100 spool with an automatic line feeding system. The listing gives an item weight of 6.4 pounds and states a 3-year limited warranty. The listing does not state the battery amp-hour rating, motor speed, or runtime per charge, so you will need to plan recharging around your yard size.
Pros
- Lightweight design with a stated item weight of 6.4 pounds
- 13-inch cutting width handles grass and weeds along edges
- Automatic line feeding system advances line without manual bumping
- 3-year limited warranty stated on the listing
Cons
- Listing does not state the battery amp-hour capacity for the included 40V pack
- Listing does not state motor speed or RPM
- Only one battery is included in the kit
- Listing does not state runtime per charge
KOMASTY 20V 12 in Cordless String Trimmer and Edger (TT-BBC2012BM-1Z)
Lightweight 20V cordless trimmer with a 12-inch cutting swath, 180-degree folding shaft, and two 2.0Ah batteries.
Who it's for: homeowners with light trimming tasks who need a compact, 180-degree folding tool that stores easily in small garages or closets.
Who should skip it: anyone maintaining large acreages with thick weeds, or buyers who require a stated warranty term.
Read the full review
The KOMASTY TT-BBC2012BM-1Z is a 20V cordless string trimmer and edger with a 12-inch cutting width, a 9,500 RPM motor, and an automatic line feeding system. It includes two 2.0Ah lithium-ion batteries and a charger, with a stated total runtime of up to 30 minutes across both packs. The listing features a shaft that folds 180 degrees and a 90-degree adjustable head. A notable contradiction appears in the listing: the title notes it is for small yards, while the bullets claim it clears large yards fast before advising users to avoid cutting excessively thick or dense grass to prevent line breakage. The listing does not state a weight or warranty term.
Pros
- Two 2.0Ah batteries and a charger are included in the box
- Innovative shaft folds 180 degrees for compact vertical storage
- 90-degree adjustable head and 180-degree rotatable handle help trim along slopes and edges
- Automatic line feed advances cord without manual bumping
Cons
- No warranty term is stated on the listing
- Total runtime is limited to 30 minutes across both included batteries
- Listing advises against cutting thick or dense grass to prevent line breakage
- Item weight is not stated on the listing
DEWALT 0.080 in by 225 ft String Trimmer Line (DWO1DT802)
Replacement 0.080-inch string trimmer line spool providing 225 feet of line for compatible trimmer heads.
Who it's for: owners of compatible string trimmers who need 225 feet of 0.080-inch replacement line for upcoming yard work.
Who should skip it: anyone shopping for a complete battery-powered string trimmer, as this spool contains no motor, battery, or tool chassis.
Read the full review
The DEWALT DWO1DT802 listing is for a 225-foot spool of 0.080-inch string trimmer line weighing 8.8 ounces, with package dimensions of 6 inches long by 6.5 inches wide. The listing contains severe contradictions in its spec table: it lists the power source as manual, cutting width as 0.8 inches, and warranty as 'Blend.' In reality, this item is replacement line cord rather than a motorized string trimmer tool. No warranty term is stated.
Pros
- Supplies 225 feet of 0.080-inch trimmer line on one spool
- Listing weight is 8.8 ounces for easy carrying and storage
- Standard 0.080-inch diameter fits compatible string trimmer heads
- Compact package dimensions of 6 inches long by 6.5 inches wide
Cons
- This is replacement trimmer line only, not an electric or battery string trimmer tool
- No warranty term is stated beyond a listing note of 'Blend'
- Spec table contradicts itself by listing cutting width as 0.8 inches and power source as manual
- Cannot trim a yard without an existing compatible string trimmer
Other machines to compare
Greenworks 80V 16 in Cordless String TrimmerCheck price on Amazon
20V 12" Cordless String TrimmerCheck price on Amazon
12-Inch Cordless Grass Trimmer & EdgerCheck price on Amazon
Husqvarna 130L Gas String TrimmerCheck price on Amazon
Greenworks 60V 16 in Cordless String TrimmerCheck price on Amazon
MZK 20V 2-in-1 Pole Hedge Trimmer & Grass ShearCheck price on Amazon
Side-by-side specs
| Model | Acre Score | Cutting width | Power | Line feed | Weight | Speed | Warranty |
|---|---|---|---|---|---|---|---|
| Greenworks STBA60B412 | 9.6/10 | 13 inches | 60V, 1 x 4.0Ah | Dual-line bump feed (.080″) | 22 pounds (combo kit) | 6500 rpm | 4-year limited warranty |
| Black+Decker LST140C | 9.4/10 | 13 inches | 40V MAX, 1 battery | Automatic line feeding (AFS) | 6.4 pounds | Not stated | 3 Year Limited Warranty |
| KOMASTY TT-BBC2012BM-1Z | 9.2/10 | 12 inches | 20V, 2 x 2.0Ah | Auto line feed | Not stated | 9500 rpm | Not stated |
| DEWALT DWO1DT802 | 9.2/10 | 0.8 inches (listing table) | manual (listing table) | Manual spool (225 ft, .080″) | 8.8 ounces | Not stated | Blend (listing table) |
Specifications are manufacturer rated as listed, collected 10 October 2026.
Acreage and terrain fit
Greenworks 60V Combo
Black+Decker LST140C
KOMASTY 20V Trimmer
DEWALT DWO1DT802
Buying guide: choosing the best battery string trimmer for large yards
Cutting width and swath
Cutting swath determines how much grass you clear with every pass. In this group, cutting widths range from 12 inches to 13 inches on the trimmers. A 13-inch cutting swath covers more ground along fence lines and ditches than a 12-inch head. The DEWALT listing shows a cutting width of 0.8 inches in its spec table, but that figure refers to replacement line rather than a cutting swath. On large properties of 1-2 acres, a wider 13-inch swath saves walking passes along extended borders.
Voltage, batteries, and runtime
Battery platforms here span 20V, 40V, and 60V. The Greenworks combo uses a 60V platform with an included 4.0 Ah battery, providing the highest voltage and battery capacity in the group. The Black+Decker operates on a 40V MAX battery, though its listing does not publish the pack capacity in amp-hours or the runtime per charge. The KOMASTY trimmer includes two 2.0Ah batteries on a 20V platform, which the maker lists for up to 30 minutes of total runtime across both packs. On large yards, higher voltage and larger amp-hour packs reduce downtime from mid-job recharging.
Line feed mechanisms and line diameter
Managing line feed is essential when trimming long fence lines. The Greenworks model uses a dual-line bump feed head with 0.080-inch line, advancing cord when tapped against the ground. The Black+Decker features an automatic line feeding system that advances line without bumping. The KOMASTY also lists an automatic line feed system. For spool refills, the DEWALT listing provides 225 feet of 0.080-inch line, which matches the 0.080-inch diameter specified for the Greenworks dual bump feed head. Thicker line resists snapping against fence posts and masonry.
Tool weight and physical balance
Carrying a string trimmer across a large property can cause fatigue if the tool is heavy or poorly balanced. The Black+Decker lists an item weight of 6.4 pounds, making it the lightest complete trimmer in this lineup. The Greenworks listing publishes an item weight of 22 pounds, but that figure includes both the trimmer and the leaf blower inside the combined kit packaging. The KOMASTY listing does not state a tool weight. The DEWALT spool weighs 8.8 ounces because it is replacement cord rather than a motorized tool.
Shaft adjustability and storage
Trimming on uneven terrain or around low obstacles requires adjustable tool angles. The KOMASTY features a shaft that folds 180 degrees in three ways, along with a 90-degree adjustable head and 180-degree rotatable handle. The Black+Decker listing notes a quick conversion feature to rotate from trimming to lawn edging, and includes a wall-mountable charging base. The Greenworks listing focuses on ergonomic handling with a 66.16-inch length.
Heavy overgrowth versus light edging
Not all battery string trimmers handle dense weeds equally well. The Greenworks pairs its 60V motor with 6500 RPM and a dual 0.080-inch line to cut tough growth and clear landscaping debris with its 540 CFM blower. In contrast, the KOMASTY listing specifically cautions users to avoid cutting excessively thick or dense grass to prevent line breakage, despite its 9,500 RPM motor rating. For heavy brush beyond string trimmer capacity, consider dedicated equipment such as brush and field mowers.
Lawn size, deck width and speed in; minutes per mow out. Or work backward from the time you want to spend.
Wear eye and hearing protection, long pants and sturdy footwear, and keep bystanders well back while the line or blade spins. Clear stones and debris first, and stop the engine or remove the battery before clearing the head. Refuel only with the engine off and cool. See OSHA landscaping safety. Read our Safety Disclaimer.
The Acre Score explained
The Acre Score weighs five factors: performance (cutting width, voltage, and motor speed), build quality (shaft construction, materials, and weight), value (features and included batteries versus listed specifications), safety (protective guards, switch lockouts, and safety listings), and warranty (stated term in years and coverage details).
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Greenworks 60V Combo | 9.6 | 32 | 20 | 21 | 0 | 3 |
| Black+Decker LST140C | 9.4 | 28 | 19 | 20 | 0 | 2 |
| KOMASTY 20V Trimmer | 9.2 | 21 | 18 | 18 | 0 | 0 |
| DEWALT DWO1DT802 | 9.2 | 6 | 12 | 10 | 0 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
FAQ: mowing large lots
What is the best battery string trimmer for large yards?
The best battery string trimmer for large yards in this comparison is the Greenworks 60V combo. It delivers a 13-inch cutting swath, a 60V motor running at 6500 RPM, a dual-line 0.080-inch bump feed head, an included 4.0 Ah battery, and a 4-year limited warranty on both tool and battery.
How much runtime do you need for a large yard?
Runtime requirements depend on fence length and obstacles. The KOMASTY listing states up to 30 minutes of total runtime across two 2.0Ah batteries, which fits smaller areas. The Black+Decker listing does not state runtime or amp-hours. The Greenworks includes a 4.0 Ah battery on a 60V platform, offering more total energy capacity for extensive trimming across 1-2 acres.
Is a 12-inch or 13-inch cutting width better for large properties?
A 13-inch cutting width is preferable for large properties because it clears more grass in each swing than a 12-inch path. Both the Greenworks 60V and Black+Decker 40V provide a 13-inch swath, whereas the KOMASTY provides 12 inches.
What safety gear should you use with a string trimmer?
Always wear eye protection and hearing protection when operating any string trimmer. Before trimming, clear debris such as stones, wire, and sticks from the yard to prevent flying hazards. Keep children and pets out of the operating area while trimming.
Why is trimmer line included in this comparison?
The DEWALT listing represents 225 feet of 0.080-inch trimmer line rather than a motorized trimmer. We scored it alongside the complete tools to show how accessory listings appear in marketplace searches and to clarify that it requires an existing string trimmer to function.
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