Best Battery-Operated String Trimmers for Easy Cordless Yard Care
Cordless string trimmers provide convenient, maintenance-free lawn edging and weed trimming without gas engines or cords. This guide highlights five top battery-powered models that balance power, runtime, and ease of use for American yards of varying sizes. Each option combines a reliable battery system, a 12-inch to 13-inch cutting path, and user-friendly features like 2-in-1 trimmer/edger configurations or automatic line feeds. Read on to compare capabilities and choose the best fit for your yard work demands.
| Product | Brand | Voltage / Battery | Cutting Path | Included Battery(s) | |
|---|---|---|---|---|---|
| WORX WG163 | WORX | 20V | 12″ | 2 Batteries & Charger | 2-in-1 Trimmer & Edger; Instant Line Feed |
| BLACK+DECKER LST140C | BLACK+DECKER | 40V MAX | 13″ | Battery & Charger Included | Charge Indicator; High-Torque Transmission |
| Greenworks 40V 12″ | Greenworks | 40V | 12″ | 2.0Ah Battery & Charger | Auto Feed Head; Variable Speed Trigger |
| BLACK+DECKER LST522 | BLACK+DECKER | 20V MAX | 12″ | Battery & Charger Included | 2-Speed; Automatic Feed Spool |
| SUNCHERS 20V 12″ | SUNCHERS | 20V | 12″ | 2×4.0Ah Batteries & Fast Charger | 60+ Minutes Runtime; Telescopic Shaft |
WORX WG163 20V Trimmer And Edger
The WORX WG163 leverages a 20V PowerShare battery system and ships with two batteries and a charger, delivering flexible runtime around the yard. It quickly converts from a string trimmer to an edger, making it suitable for edging along sidewalks and along garden beds. The design includes a 12-inch cutting path, which is well-suited for compact to medium-sized yards. A user-friendly push-button line feed minimizes interruptions during trimming tasks.
- TRIMMER & EDGER 2-in-1 design for versatile use
- INSTANT LINE FEED with push-button spool
- HEAD TILTS 90° for access on slopes and uneven terrain
The WG163 emphasizes ease of maintenance and rapid transitions between trimming and edging. The dual batteries provide extended operation, and the tilt capability helps reach challenging spots around shrubs and fences. Lightweight construction reduces fatigue during longer sessions.
BLACK+DECKER LST140C 40V Trimmer
The BLACK+DECKER LST140C uses a high-performance 40V MAX Lithium Ion battery, and includes a battery with a charge indicator to help plan work. The tool features PowerDrive high-torque transmission, delivering strong cutting power for thicker grass and weeds. It converts from trimmer to edger in seconds for flexible yard work, and the battery-powered design reduces noise and maintenance compared to gas models.
- 40V MAX battery with state-of-charge indicator
- POWER DRIVE high-torque transmission for better cuts
- 2-in-1 Trimmer & Edger with quick conversion
The LST140C’s compact form factor and quick conversion make it a practical choice for users who want straightforward operation and reliable yard edging without cords or gasoline. The 13-inch cutting width supports faster trimming on larger patches of lawn while staying manageable for small-to-medium yards.
Greenworks 40V 12-Inch Trimmer
Greenworks offers a 40V 12″ cordless trimmer that includes a 2.0Ah battery and charger. The tool supports a 12-inch cutting path with an auto feed head for quick line advancement. A variable speed trigger provides control for delicate edging around plants and shrubs, reducing the risk of accidental damage to surrounding ornamentals. This model is designed for reliability in typical American yards with moderate to aggressive growth.
- 40V power with a 12″ cutting path
- Auto feed head for easy line advancement
- VARIABLE SPEED TRIGGER to match task difficulty
With the included battery and charger, the Greenworks trimmer is a convenient option for homeowners seeking a balanced combination of runtime, power, and straightforward operation, ideal for routine lawn maintenance and edging tasks.
BLACK+DECKER LST522 20V Trimmer
The BLACK+DECKER LST522 introduces a 20V MAX system with a compact form factor and a 12-inch cutting path. It supports a 2-speed configuration to transition between light trimming and tougher weed-cutting tasks. The 2-in-1 design makes it easy to switch to edging, and the automatic feed spool minimizes manual line advancement during operations.
- 2-Speed operation for versatile trimming
- 2-in-1 Trimmer & Edger configuration
- Automatic Feed Spool reduces bumps during use
Designed for everyday yard work, the LST522 emphasizes user-friendly operation, dependable battery power, and a compact footprint that helps reduce arm strain during longer sessions around landscaping beds and walkways.
SUNCHERS 20V 12-Inch Trimmer
SUNCHERS offers a robust 20V system with two 4.0Ah batteries and a fast charger, providing substantial runtime for larger yards. The 12-inch cutting width is paired with a telescopic shaft extending from 45 to 51 inches, accommodating taller users and reducing bending. The 90° adjustable head and 180° adjustable handle enhance trimming angles, while a wheel converts the unit to an edger for clean edges along pathways.
- Two 4.0Ah batteries + fast charger for long runtime
- Telescopic shaft: 45″ to 51″
- 90° adjustable head with 180° handle; wheel-edger option
The SUNCHERS model emphasizes extended reach and flexibility, making it well-suited for larger yards or users who prefer a longer reach and adjustable trimming angles without sacrificing edge quality around pavement and garden borders.
Buying Guide
Power, Voltage, and Runtime
Voltage typically correlates with cutting power in cordless trimmers. Higher voltage (40V, for example) offers stronger cuts through thick weeds, while 20V models are lighter and easier to handle for small to medium yards. Consider battery capacity (Ah) and how the toolkit’s runtime matches your mowing schedule. If you trim weekly in a medium-to-large yard, models with two batteries or larger capacity are advantageous to reduce downtime.
Cutting Width and Line System
A wider cutting path speeds up jobs on open spaces but may be heavier to maneuver. Auto feed spools minimize manual line advancement, reducing interruptions. A 12″ to 13″ path is typical for residential use. If you encounter thick grasses often, look for models with robust line feeds or a high-torque transmission for consistent power delivery.
2-in-1 Functionality: Trimmer And Edger
Most buyers benefit from a 2-in-1 design that switches quickly between trimming and edging. Check the ease of conversion, the stability of the edging wheel, and the range of tilt angles. A 90° head or more and adjustable handles improve reach around corners, sidewalks, and garden beds, preserving neat borders without stooping or twisting.
Ergonomics, Weight, And Handle Design
Weight and balance influence comfort during extended use. Look for ergonomic grips, adjustable handles, and telescoping shafts that accommodate different user heights. A comfortable grip reduces fatigue, while a lighter tool can help beginners handle edging tasks along patios or fence lines with less strain.
Battery Ecosystem And Compatibility
Some brands use a shareable battery system across tools, which can reduce total cost and simplify charging. If you already own a tool from the same brand, choosing a compatible battery platform can be advantageous. Consider charging time and whether spare batteries are needed for longer sessions away from outlets.
Maintenance, Durability, And Safety
Regular spool replacement and blade maintenance extend tool life. Look for durable housings, simple blade or line replacement procedures, and safety features such as automatic shutoffs and protective guards around the cutting area. Battery health and storage considerations also help preserve performance over time.
Practical Comparisons
- Best for light-to-moderate yard work: 20V models like WORX WG163 or BLACK+DECKER LST522 offer lighter weight and quick conversions.
- Best for larger yards or tougher growth: 40V options like BLACK+DECKER LST140C or Greenworks 40V provide more cutting power and longer runtimes.
- Extended runtime and reach: SUNCHERS stands out with two 4.0Ah batteries and a telescopic shaft for tall users or expansive lawns.