5 Best Cordless String Trimmer Edger: Top Picks and Buying Guide

If you are shopping for the best cordless string trimmer edger, the BLACK+DECKER 20V MAX String Trimmer and Edger is the strongest all-around choice for most homeowners. It combines a practical 12-inch cutting swath, automatic line feeding, comfortable adjustments, and a battery and charger in the box. The Worx 20V 10″ 2-in-1 Cordless String Trimmer is the clear alternative when low weight, plant protection, and WORX battery compatibility matter most.

These tools are designed for the work a lawn mower cannot finish: trimming around fences and beds, cleaning up tall grass, and creating a sharper border along sidewalks or driveways. A cordless model also avoids gas, extension cords, and the starting or fueling hassles associated with traditional equipment.

The rankings below compare cutting width, power-management features, line-feed design, handling, battery setup, versatility, and ownership considerations. The list includes both straightforward homeowner trimmers and more ambitious multifunction tools, so you can match the equipment to your yard rather than simply choosing the most powerful-looking option.

Best Cordless String Trimmer Edger Picks at a Glance

1. BLACK+DECKER 20V MAX String Trimmer and Edger

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The BLACK+DECKER 20V MAX String Trimmer and Edger earns the top position because it offers the most balanced combination of convenience, control, and useful everyday performance. Its 12-inch cutting swath is wide enough to make routine cleanup reasonably efficient without making the tool unnecessarily cumbersome around garden beds, posts, and landscaping borders.

Its POWERDRIVE transmission is designed to deliver more motor power to the cutting string, while the motor reaches up to 6,200 RPM. That combination should appeal to homeowners who need more than light cosmetic trimming but do not want to move up to a heavier-duty platform. The Automatic Feed Spool advances line when needed without bumping the head, reducing one of the most common interruptions during yard work.

Switching between trimming and edging takes seconds, making it practical for maintaining grass along sidewalks, driveways, and planting areas. The adjustable handle and height positions support a more comfortable stance, and reduced vibration helps during longer sessions. It is also quieter and easier to start than a gas-powered trimmer, with no fuel mixing or pull-start procedure.

The kit includes a 2.0Ah lithium-ion battery, charger, and a wall-mountable charging base. BLACK+DECKER states that this battery provides 33% more runtime per pack than its previous LBXR20 battery. As a 20V MAX tool, it is most attractive to owners already using compatible BLACK+DECKER batteries, although this package includes what you need to begin. A 12-inch swath favors maneuverability over maximum coverage, so large properties or dense brush may call for a higher-capacity battery or a stronger platform.

2. Worx 20V 10″ 2-in-1 Cordless String Trimmer

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The Worx 20V 10″ 2-in-1 Cordless String Trimmer is the clearest alternative to the top-ranked BLACK+DECKER because it emphasizes light handling and precision around delicate landscaping. At only 4.2 pounds, it is especially appealing for smaller yards, routine touch-ups, and users who prefer a tool that is easy to carry and control rather than one built around the widest possible cutting path.

The trimmer converts to an in-line edger by rotating the head 180 degrees. It also lets you choose between a narrower cut for potentially longer runtime and a wider cut for faster work. That flexibility is useful when the same yard includes both tight flower beds and more open lawn edges. An automatic feed line system advances cord without bumping, helping keep the workflow simple.

A notable advantage is the adjustable spacer or flower guard. It helps create a physical buffer around flowers, plants, ornaments, and other landscape features, which can give less experienced users more confidence when trimming close to valuable borders. The auxiliary handle and long shaft provide reach while preserving control around fences, garden beds, and awkward corners.

This model belongs to the WORX Power Share battery system. The included 20V battery works with WORX 20V tools and select 40V and 80V WORX products, giving the package more value for an existing WORX owner. The trade-off is its 10-inch cutting width: it will take more passes than a 12- or 13-inch tool across larger areas. Choose it when low weight, edge precision, and platform compatibility are more important than covering a broad section of lawn quickly.

3. 13″ Electric Weed Wacker

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This 13-inch Electric Weed Wacker places third because it offers the broadest range of cutting functions in the group, but its comparatively small review base and more specialized design make it harder to recommend universally. It is positioned as a 4-in-1 tool that can serve as a string trimmer, lawn edger, mini lawn mower, and brush cutter, giving owners more ways to handle an irregular or overgrown yard with one device.

Instead of relying only on trimmer line, it includes three cutting options: trimmer line, metal blades, and saw blades. That lets users select a method for ordinary grass, tougher weeds, or small shrubs. Its 15,000 RPM brushless motor and steel gear set are designed to improve cutting power and reduce jamming, while the 13-inch width can cover ground efficiently during basic trimming.

The adjustable cutting head and telescoping pole help accommodate different heights and angles. A non-slip ergonomic handle is intended to reduce fatigue, and the listed weight is 5.2 pounds. The package is unusually complete, including replacement blades, trimmer lines, a storage bag, installation tools, and a matched charger. It also lists a three-year warranty for the main machine and a two-year warranty for the batteries.

Two 21V 6.0Ah batteries are included, which is a substantial battery setup compared with many basic trimmer kits. Still, the extra blades and functions mean setup and safe handling deserve more attention than with a simple line-only model. Metal and saw blades require appropriate clearance and careful storage, and this tool may be more capability than a small, regularly maintained lawn needs. It makes the most sense for owners who specifically want multifunction cutting and extended battery capacity in one kit.

4. 20V Electric Cordless String Trimmer 2 X

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The 20V Electric Cordless String Trimmer 2 X ranks fourth as a compact, storage-friendly option for small yards and basic lawn maintenance. Its strongest distinction is not an unusually broad feature set but the way it folds and pivots. The shaft folds 180 degrees in three ways for vertical storage, which may be valuable in an apartment, compact garage, shed, or crowded utility area.

A 90-degree adjustable head and 180-degree rotatable handle help the tool reach slopes, areas beneath benches, and corners that are uncomfortable with a fixed arrangement. It also converts between trimming and edging by pivoting the head, so one tool can handle tall grass and cleaner lawn borders. The 12-inch cutting swath is a useful middle ground for ordinary homeowner work.

The upgraded motor is listed at 9,500 RPM, and the automatic line-feed system dispenses cord without bumping. If the cord breaks, the supplied instructions describe releasing the trigger, then pressing and holding the safety lock and switch together to reactivate the tool. Keeping the head parallel to the ground during trimming is also important for proper operation.

The package includes two 2.0Ah batteries and a charger, with up to 30 minutes of total continuous runtime stated for the two batteries. That figure is best viewed as a task-planning guide rather than a guarantee for every cutting condition. Thick or dense growth can demand more power, and the manufacturer advises allowing batteries to cool for a few minutes after use. This is a practical choice for homeowners who value compact storage and maneuverability, but a larger yard may require working in sections or keeping the second battery charged and ready.

5. BLACK+DECKER 40V MAX 13 in String Trimmer

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The BLACK+DECKER 40V MAX 13 in String Trimmer is fifth on this list not because it lacks useful capability, but because its higher-voltage platform is more than some small-yard owners need. It is a sensible choice for users who want a wider 13-inch cutting path, additional control over power consumption, and a battery system aimed at longer or more demanding trimming sessions.

Its standout feature is the PowerCommand Dial, which allows the operator to choose maximum power for thick weeds or maximum runtime for longer areas. That type of adjustment is helpful when one yard contains both light grass around a patio and heavier growth along a fence. The POWERDRIVE transmission supports power delivery to the cutting string, while the motor operates at speeds up to 8,500 RPM.

Like the other leading options here, it uses an Automatic Feed Spool, so line advances as needed without bumping. Conversion from trimmer to edger takes seconds, and the adjustable height and soft-grip handle are intended to make extended use more comfortable. A battery state-of-charge indicator provides a clearer idea of remaining power, which can make it easier to plan a larger job.

The included 40V MAX lithium-ion battery and fast charger are important ownership advantages. The charger is specified to restore full battery power in two hours or less. That is convenient, although replacement batteries and chargers should be selected from the compatible BLACK+DECKER 40V MAX family rather than mixed with the company’s 20V platform. Choose this model when the 13-inch width and power/runtime control justify the larger system; for light edging and occasional trimming, the 20V BLACK+DECKER or lighter Worx model is likely easier to handle.

How to Choose the Best Cordless String Trimmer Edger

A cordless string trimmer edger is often purchased as a secondary lawn tool, but it still needs to match the size, layout, and condition of your property. The right choice is not automatically the model with the highest RPM or largest battery. A well-matched trimmer should be comfortable enough to use regularly, powerful enough for the vegetation you actually face, and simple to maintain between jobs.

Start with the type of work you do most

Think about whether your main task is light edging, general grass trimming, weed removal, or clearing tougher growth. Routine work around sidewalks and flower beds favors a lightweight 2-in-1 tool with good maneuverability. The Worx model is particularly suited to that use because of its 4.2-pound weight, flower guard, and narrow 10-inch cutting width.

If your yard has mixed conditions, a model with a wider swath and stronger power delivery may save time. The 12-inch BLACK+DECKER 20V tool balances maneuverability and coverage, while the 13-inch models cover more ground per pass. The multifunction 13″ Electric Weed Wacker is aimed at owners who specifically need blade options for brush or small shrubs, not merely owners who want to trim lawn edges.

Understand cutting width

Cutting width describes how much grass the head reaches in one pass. A 10-inch head is easier to guide in confined areas and can be a good match for small yards, narrow beds, and precise edging. The trade-off is that it requires more passes across an open lawn.

A 12-inch or 13-inch head can improve efficiency over larger areas. However, a wider head may feel less precise beside plants and may require more care around landscape borders. Width should therefore be matched to both the amount of lawn and the number of obstacles. A large cutting path is not automatically better if most of your work takes place between shrubs, posts, and hardscape.

Choose the battery platform carefully

Battery compatibility can be one of the most important long-term considerations. The WORX 20V battery works with WORX 20V tools and select 40V and 80V products in the Power Share system. That makes the Worx trimmer more attractive if you already own compatible WORX equipment or expect to add other cordless tools.

The BLACK+DECKER 20V MAX and 40V MAX products belong to different voltage families. Do not assume that a 20V MAX battery will operate a 40V MAX trimmer or that chargers are interchangeable. If you already have BLACK+DECKER batteries, confirm the voltage family and battery design before purchasing another bare tool or replacement pack.

The multifunction model’s two 21V 6.0Ah batteries provide a different kind of value: substantial stated capacity and the ability to keep working with a second pack available. The 20V Electric Cordless String Trimmer 2 X includes two 2.0Ah batteries and states up to 30 minutes of total continuous power. Runtime depends on grass density, cutting technique, line condition, and whether the tool is used under heavy load, so battery capacity should be treated as planning information rather than an exact job-time promise.

Runtime, charging, and job planning

For a small property, one included battery may be sufficient when the trimmer is used for occasional edging and touch-ups. Larger yards, overgrown areas, and infrequent maintenance sessions can consume power more quickly. A second battery reduces downtime, but it also adds cost and storage needs if purchased separately.

Charging convenience matters just as much. The top BLACK+DECKER 20V kit includes a wall-mountable charging base, while the BLACK+DECKER 40V model includes a fast charger specified to restore full power in two hours or less. These details are useful when the trimmer lives in a garage and needs to be ready for a short-notice cleanup.

Allow a battery to cool after demanding use when the instructions call for it, and avoid storing packs in places exposed to excessive heat or moisture. Keeping batteries charged according to the manufacturer’s directions helps prevent a simple maintenance habit from becoming a scheduling problem.

Look for automatic line feeding

Line-feed design affects how interrupted the work feels. An automatic feed system advances line when needed, eliminating the need to bump the head against the ground. All five listed options provide some form of automatic feeding, but automatic feed does not mean line will never run out or break.

Use the correct line type and diameter specified for the particular trimmer. Avoid forcing oversized line into the spool, and inspect the head if feeding becomes inconsistent. Grass wrapped around the cutting head, incorrectly installed line, or a spool that is not seated correctly can all make an automatic system appear faulty.

Consider trimmer-to-edger conversion

A 2-in-1 design is useful when the lawn has visible borders along sidewalks, driveways, patios, or beds. The conversion method varies by product. The Worx model rotates the head 180 degrees for in-line edging, while the BLACK+DECKER models are designed to convert in seconds. The 20V Electric Cordless String Trimmer 2 X uses a pivoting head.

Before edging, check that the head is locked in the intended position and keep the cutting line aligned with the border. Edging is a controlled operation, not simply trimming while tilted at an extreme angle. Move slowly enough to maintain a straight line and avoid throwing debris toward people, vehicles, windows, or delicate plants.

Prioritize balance and adjustability

Weight is only part of comfort. A trimmer’s balance, shaft length, auxiliary handle, grip texture, and head angle all affect how much strain reaches your wrists, shoulders, and back. The Worx model’s 4.2-pound design favors easy carrying. The multifunction trimmer lists a 5.2-pound weight and adds a telescoping pole and adjustable head. The BLACK+DECKER models offer adjustable height or telescoping adjustment along with handle features intended for better control.

Set the shaft so the cutting head rests at a comfortable distance in front of you rather than forcing you to bend forward. Keep both hands on the tool where the design provides two-hand control, and let the head do the cutting instead of pressing hard into the grass. If several people share the trimmer, adjustable height becomes more valuable because one fixed position rarely suits everyone equally well.

Decide whether you need blades

Most homeowners only need a line head for grass and ordinary weeds. A blade system can be useful for brush or tougher vegetation, but it introduces extra setup, storage, and safety considerations. The 13″ Electric Weed Wacker includes trimmer line, metal blades, and saw blades, making it the most versatile option in this group.

That versatility should not be confused with unlimited cutting ability. The supplied data describes small shrubs and overgrown weeds, not heavy timber or large woody growth. Use only the attachments intended for the tool, install them exactly as directed, and inspect guards and fasteners before operation. Store spare blades safely and keep bystanders away from the cutting area.

Use guards and protective equipment

String trimmers can throw stones, line fragments, and other debris even during ordinary lawn work. Wear eye protection, sturdy closed-toe footwear, and clothing that does not hang near the rotating head. Keep children, pets, and other bystanders away from the work area.

A flower guard, such as the adjustable spacer on the Worx model, can help reduce accidental contact with plants and ornaments, but it does not replace careful handling. Locate loose stones, sticks, irrigation components, and decorative edging before starting. Never clear a jam with the battery installed; remove the battery first and follow the product instructions.

Basic maintenance and troubleshooting

After each use, remove grass and weeds from the head, guard, and ventilation areas. A clogged head can increase load and reduce cutting consistency. Check the line spool for correct winding, examine the cutting line for excessive wear, and inspect the guard and handle for damage.

If the trimmer will not start, confirm that the battery is charged and fully seated, then check the safety lock and trigger procedure. If automatic feed stops working, release the trigger, remove the battery, and inspect the spool for tangles or incorrectly installed line. For the 20V Electric Cordless String Trimmer 2 X, the supplied operating instructions specifically describe releasing the trigger and pressing the safety lock and switch together after a line break.

Do not continue using a trimmer that vibrates unusually, makes a new grinding sound, or has a damaged guard. Remove the battery before inspecting the cutting head, and consult the manual or manufacturer support when the problem is not obvious. Proper storage also matters: keep the tool dry, protect the cutting head from impact, and store batteries separately as directed.

Match the tool to yard size and ownership goals

For a small yard and occasional edging, light weight and simple controls usually matter more than maximum voltage. The Worx model’s low weight and plant guard support precise maintenance, while the compact folding design of the 20V Electric Cordless String Trimmer 2 X is useful where storage space is limited.

For a typical homeowner wanting one dependable trimmer for grass, weeds, and edging, the BLACK+DECKER 20V model is the most balanced choice. Its included battery and charger, automatic feed, adjustable handling, and 12-inch path cover the needs of many routine maintenance jobs.

For bigger or more demanding work, consider the 40V BLACK+DECKER model or the multifunction 13″ tool. The former provides power/runtime adjustment and a 13-inch width; the latter adds blade attachments and two higher-capacity batteries. In either case, make sure the extra capability is relevant to your yard before accepting the added setup and handling requirements.

Best Cordless String Trimmer Edger FAQ

What is the best cordless string trimmer edger for most homeowners?

The BLACK+DECKER 20V MAX String Trimmer and Edger is the strongest general-purpose choice in this ranking. It has a 12-inch cutting swath, automatic line feeding, fast trimmer-to-edger conversion, adjustable handling, and a battery and charger included. It is well suited to ordinary grass trimming and lawn-edge cleanup.

Is the Worx 20V trimmer a good alternative?

Yes. The Worx 20V 10″ 2-in-1 Cordless String Trimmer is a particularly good alternative for small yards, precise work around flower beds, and users who value low weight. Its 4.2-pound design, flower guard, automatic feed, and WORX Power Share compatibility are meaningful advantages. Its narrower 10-inch cutting width is less efficient over broad areas.

Are cordless trimmer batteries interchangeable?

Only when the battery is approved for that tool’s specific platform and voltage family. WORX Power Share batteries are designed for compatible WORX tools, while BLACK+DECKER 20V MAX and 40V MAX products use different battery families. Always verify compatibility with the tool and charger documentation before swapping or buying a replacement pack.

Is a 10-inch, 12-inch, or 13-inch cutting width better?

A 10-inch width favors precision and maneuverability in tight landscaping. A 12-inch width provides a balanced combination of control and coverage, and a 13-inch width can reduce passes across more open lawn. The best size depends on your yard layout, not just its total area.

Do automatic-feed trimmers still need line maintenance?

Yes. Automatic feeding reduces bumping, but line can still wear out, break, tangle, or be installed incorrectly. Keep the spool clean, use the recommended line, and inspect the head after a line-feed problem. Always remove the battery before clearing a jam or servicing the spool.

Should I choose a cordless trimmer with metal or saw blades?

Choose a blade-equipped model only if you regularly need to handle vegetation beyond ordinary grass and weeds. The 13″ Electric Weed Wacker includes metal and saw blade options along with trimmer line, but those attachments require more careful installation, guarding, storage, and operation than a line-only trimmer. For routine edging, string line is usually simpler.

Final Verdict

The BLACK+DECKER 20V MAX String Trimmer and Edger is the best overall pick because it combines useful coverage, automatic feeding, easy edging, adjustable comfort, and a complete starter kit. Choose the Worx 20V 10″ model when low weight and plant-friendly precision are your priorities. The remaining options make sense for compact storage, higher battery capacity, wider coverage, or multifunction blade use.