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If you do regular lawn edge work, a reliable lithium cordless string trimmer can make quick work of grass along driveways, beds, and fences without the hassle of cords or gas mixing. Choosing the right trimmer affects how long you can operate between battery charges, how comfortably you can handle repetitive trimming, and how clean your final cut lines look. This guide covers seven shortlisted lithium cordless string trimmers that suit typical residential yards and small properties. We evaluated run time, cutting power, weight and ergonomics, and battery system practicality to highlight tools that perform well in real garden conditions. Read on to understand the tradeoffs so you can pick the best trimmer for your routine and yard size.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | CRAFTSMAN V20 13 in. Cordless String Trimmer and Edger Kit with 4Ah Battery |  |
| Best Quality Built to a higher standard if you want something more solid | Milwaukee M18 FUEL String Trimmer with Quik-LOK (bare tool) |  |
| Best Value The sweet spot between price and what you get | BLACK+DECKER 20V MAX 12-Inch Cordless String Trimmer and Wheeled Edger (LST522) |  |
| Best Budget The cheapest option that still gets the job done reliably | Generic 3‑in‑1 Cordless String Trimmer and Brush Cutter with 2 Batteries |  |
| Highest Rated A top-rated pick with lots of positive feedback | ALSO GO 21V Cordless Electric Weed Wacker with 12" Cutting Swath and 2×2.0Ah Batteries |  |
| Most Popular A crowd favorite that many people choose with confidence | WORX 20V 12" 2-in-1 Cordless String Trimmer & Lawn Edger (WG163) |  |
| Best Seller A high-volume bestseller chosen again and again | BLACK+DECKER 20V MAX 12" Cordless String Trimmer and Edger (LST300) |  |
CRAFTSMAN V20 13 in. Cordless String Trimmer and Edger Kit with 4Ah Battery
| Power Source | Battery Powered |
|---|---|
| Cutting width | 13 inches |
| Number of Batteries | 1 (included) |
| Battery Average Life | 63 minutes |
The CRAFTSMAN V20 13-inch string trimmer and edger kit is a compact, performance-focused tool for routine lawn-edge and trimming tasks. It combines a 4.0Ah V20 battery and two-speed motor to let you choose higher power for thick grass or lower speed for longer runtime, and the Turn-To-Edge design converts the unit to an edger without extra tools. In use the 13-inch cutting swath covers a lot of ground per pass on small to medium yards, and the adjustable handle helps maintain a comfortable posture during longer sessions. Notable features include the included battery and charger, an auto-feed spool with 0.065-inch line, and a manufacturer-stated runtime of up to 63 minutes on low speed. This model leans on a brushed motor platform, so it does not offer the higher efficiency or longer motor life of brushless designs, and heavy-duty or commercial clearing will push its limits. For homeowners who want a lightweight, easy-to-use cordless trimmer that balances runtime and cutting ability, it is a practical choice; those needing maximum durability or brushless power may prefer a different model.
Best for: Gardeners who prioritize strong cutting performance in a lightweight cordless package and want the flexibility to trade between power and runtime for routine yard maintenance.
Less Ideal for: Do not choose this if you need a commercial-grade or heavy brush-clearing tool or if you require the greater efficiency and lifespan of a brushless motor.
- Included 4.0Ah V20 battery and charger provide ready-to-use runtime up to 63 minutes on low speed
- 13-inch cutting swath covers wider area per pass, reducing time on small to medium lawns
- Two-speed control lets you prioritize power for thick grass or extend runtime for light trimming
- Turn-To-Edge functionality converts the trimmer into an edger without extra attachments
- Uses a brushed motor rather than brushless, which may reduce long-term efficiency and durability
- Line diameter is 0.065 in, which is thinner than heavier-duty trimmers and can struggle with very thick growth
Verdict: A lightweight, performance-oriented cordless trimmer kit that delivers a wide 13-inch swath and flexible two-speed operation for efficient small to medium yard work.
Milwaukee M18 FUEL String Trimmer with Quik-LOK (bare tool)
| Power Source | DC |
|---|---|
| Cutting width | 16 inches |
| Speed | 6200 rpm |
| Battery Average Life | 3 years |
The Milwaukee M18 FUEL string trimmer is a cordless, brushless trimmer engineered for demanding yard work and professional use. The POWERSTATE brushless motor delivers high torque and the listed 6200 rpm cutting speed gives the power needed to tackle thick grass and light weeds, while the 16 inch cutting width balances coverage and control for longer passes. It is offered as a bare tool and is compatible with all 13 Milwaukee QUIK-LOK attachments, so you can convert it for edging, brush cutting, or other jobs without buying a separate powerhead. Typical use is heavy-duty trimming around yards, fence lines, and properties where durability and attachment flexibility matter. Practical benefits include gas-level power without fuel maintenance and the modular QUIK-LOK system for multi-tasking. Important limitations are that the listing is for the bare tool only so batteries and charger are required, and its heavier item weight means it may be more fatiguing on extended handheld use compared with lighter consumer trimmers.
Best for: Best for homeowners or pros who need a durable, gas-replacing trimmer and value the ability to swap attachments for multiple yard tasks.
Less Ideal for: Not the best choice for casual users who want a complete kit out of the box or for those who prioritize the lightest possible tool for long daily use.
- Brushless POWERSTATE motor for strong, gas-like cutting performance
- 16 inch cutting width for good coverage without sacrificing maneuverability
- QUIK-LOK compatibility expands functionality with multiple attachments
- Cordless DC power eliminates fuel maintenance and reduces noise
- Sold as bare tool so battery and charger are not included
- Relatively heavy for handheld use which can increase operator fatigue
Verdict: Choose this trimmer if you want a heavy-duty, brushless cordless powerhead that adapts to many jobs via the QUIK-LOK attachment system.
BLACK+DECKER 20V MAX 12-Inch Cordless String Trimmer and Wheeled Edger (LST522)
| Power Source | Battery Powered |
|---|---|
| Cutting width | 12 inches |
| Speed | Two-speed (100 rpm listed) |
| Number of Batteries | 1 Lithium Ion (included) |
This BLACK+DECKER LST522 is a small, lightweight cordless trimmer aimed at routine yard cleanup and edging. It uses the included 20V MAX extended runtime lithium battery and a two-speed PowerDrive transmission so you can choose higher torque for dense grass or lower speed to preserve battery life during longer jobs. The Automatic Feed Spool (AFS) removes the need to bump to release line, which keeps cutting continuous and simple. A quick-convert wheeled edger mode and adjustable handle/height make neat borders along driveways and sidewalks straightforward without extra tools. Practical benefits include the compact 12-inch cutting swath for maneuvering around tight beds and the included charger so it is ready to use out of the box. Limits are its modest cutting width and battery class, which make it best for small to medium yards rather than heavy professional clearing, and run time depends on the chosen speed and vegetation density. For homeowners who value an easy-to-handle, multiuse tool for weekly trimming and clean edging, this is a sensible option.
Best for: Homeowners who want a lightweight, easy-to-use trimmer that handles routine trimming and clean edging around small to medium lawns and tight spaces.
Less Ideal for: Large properties, users who need long continuous runtime for heavy brush, or professionals who require commercial-grade power and wider cutting swaths.
- Includes extended-run 20V MAX lithium battery and charger for immediate use
- Automatic Feed Spool eliminates bumping to advance line for uninterrupted trimming
- Two-speed PowerDrive gives higher torque for thick growth or lower speed for longer runtime
- Converts quickly to a wheeled edger for clean borders without separate tools
- 12-inch cutting width and consumer-grade battery limit suitability for large or heavy overgrowth
- Not intended for commercial or continuous heavy-duty clearing tasks
Verdict: A compact, easy-to-handle cordless trimmer that combines automatic line feed and a wheeled edger conversion for efficient small‑yard trimming and tidy borders.
Generic 3‑in‑1 Cordless String Trimmer and Brush Cutter with 2 Batteries
| Power Source | Battery Powered |
|---|---|
| Cutting width | 30 centimeters |
| Speed | 18000 rpm |
| Number of Batteries | 2 Lithium Ion batteries included |
This cordless 3‑in‑1 string trimmer is designed as a budget-friendly, all-in-one tool for routine yard maintenance. It runs on two included 4.0Ah lithium batteries and an 880W motor rated at 18,000 RPM, which gives enough power to tackle grass, light weeds, and small brush without being tethered to an outlet. The package arrives with multiple cutting options — round and long stainless blades plus plastic blades — and basic safety gear so you can switch between trimming and light brush-cutting depending on the task. Users will appreciate the dual safety start, rotating debris shield, adjustable shaft, and the convenience of alternating batteries to keep working while one charges. Expect a tool suitable for small to medium yards and occasional heavier patches, but not for continuous commercial use or very dense woody brush. Build and long-term durability are typical of entry-level gear, so treat it as a seasonal homeowner tool and keep spare cutting parts on hand.
Best for: Cost-conscious homeowners who need an affordable cordless trimmer for regular lawn edge trimming, light weed control, and occasional brush clearing around a small to medium yard.
Less Ideal for: Landscaping professionals or homeowners with very large properties or frequent heavy-duty clearing needs should look for a commercial-grade trimmer with higher durability and clearer runtime specs.
- Comes with two 4.0Ah lithium batteries and a fast charger to minimize downtime
- Includes multiple cutting attachments (round and long stainless blades plus plastic blades) for varied trimming tasks
- Lightweight, adjustable shaft and ergonomic handle make it easy to use and store
- Safety features include a dual start switch and a rotating debris shield
- Entry-level construction may not hold up to heavy professional use or sustained cutting of dense woody brush
- No detailed runtime estimate provided so actual battery life depends on cutting conditions
Verdict: A fully equipped, budget-friendly cordless trimmer that gives homeowners the battery backup and cutting options needed for routine yard maintenance.
ALSO GO 21V Cordless Electric Weed Wacker with 12" Cutting Swath and 2×2.0Ah Batteries
| Power Source | Battery Powered |
|---|---|
| Cutting width | 12 inches |
| Speed | 9500 rpm |
| Number of Batteries | 2 (included) |
This ALSO GO 21V cordless weed wacker is designed for straightforward yard maintenance, combining a 9500 rpm motor, 12 inch cutting swath, and two 2.0Ah batteries to handle routine trimming and edging around a small to medium yard. It converts from trimmer to edger by rotating the head 90 degrees and allows vertical adjustment for slopes and corners, which makes precise edge work easier without switching tools. The automatic line feed advances the 1.4mm line as it wears, reducing stops to reload, and the package includes ten spare spools so you can keep going. At roughly five pounds and with an adjustable auxiliary handle, it is easy to maneuver and causes less fatigue during longer sessions. Important limitations are modest battery capacity compared with higher-end cordless models and a 12 inch cutting width that is ideal for light to moderate growth but will require more passes on very dense or overgrown areas. The unit is practical for everyday lawn upkeep where ease of use and low weight matter more than professional-level runtime or heavy-duty cutting power.
Best for: Best for seniors or anyone who prioritizes a lightweight, easy-to-handle trimmer for regular lawn maintenance and precise edging around walkways and garden beds.
Less Ideal for: Not a great choice for users who need long continuous runtime or who regularly trim very dense, overgrown brush on large properties.
- Lightweight design eases handling and reduces operator fatigue
- Includes two 2.0Ah batteries and a fast charger for quick swap-and-go use
- Automatic line feed with spare spools minimizes interruptions for reloading
- 2-in-1 trimmer and edger head plus vertical adjustment improves precision on edges and slopes
- 12 inch cutting width balances control and coverage for typical yard tasks
- Battery capacity is modest so continuous runtime may be limited on larger yards
- 12 inch cutting swath and 2.0Ah batteries are not optimal for very dense or overgrown vegetation
Verdict: A lightweight, easy-to-use cordless trimmer with automatic line feed and included batteries that makes routine trimming and edging simple for seniors and casual users.
WORX 20V 12" 2-in-1 Cordless String Trimmer & Lawn Edger (WG163)
| Power Source | Battery Powered |
|---|---|
| Cutting width | 12 inches |
| Speed | 7600 rpm |
| Number of Batteries | 2 Lithium Ion batteries required. (included) |
The WORX WG163 is a compact 2-in-1 cordless string trimmer that converts quickly to a wheel-guided edger for straight, clean borders. It uses a Command Feed spool so you only advance line when you want to, and the head tilts 90 degrees to reach slopes and tight areas. Rubberized support wheels help guide edging for consistent results and the adjustable spacer guard protects flowers and landscaping during trimming. Included with the tool are two 20V PowerShare batteries and a charger, which makes it ready to work on small to medium yards and lets you swap batteries across other WORX 20V tools. At about 5.5 pounds it is easy to maneuver and less fatiguing for longer sessions. Limitations to consider are the modest 12-inch cutting swath and single-speed motor, so it is not the fastest option for very large properties or heavy brush. The Command Feed system reduces bump-feed interruptions but you will still need to keep replacement line on hand for sustained use.
Best for: Buyers who want a lightweight, easy-to-use 2-in-1 trimmer and edger for small to medium lawns and value included batteries and proven features backed by many user reviews.
Less Ideal for: Not well suited for homeowners with large acreage, dense brush, or who need variable-speed power for heavy-duty cutting tasks.
- Converts quickly between trimmer and wheel-guided edger for two tools in one
- Command Feed spool provides on-demand line advance without bumping
- Two 20V PowerShare batteries included so you can work longer and use batteries across other WORX tools
- 90° tilting head and adjustable spacer guard improve access and protect plants
- Lightweight design eases fatigue during extended use
- 12-inch cutting width and single-speed motor limit efficiency on large yards or thick vegetation
Verdict: Choose the WORX WG163 if you want a lightweight, battery-ready 2-in-1 trimmer and edger that is easy to use and works well on small to medium lawns.
BLACK+DECKER 20V MAX 12" Cordless String Trimmer and Edger (LST300)
| Power Source | Battery Powered |
|---|---|
| Cutting width | 12 inches |
| Speed | 6200 rpm |
| Number of Batteries | 1 Lithium Ion (included) |
The BLACK+DECKER LST300 is a compact, battery-powered 2-in-1 string trimmer and wheeled edger designed for routine yard maintenance and edging tasks. It uses a 20V Powerconnect lithium-ion battery (included) and a PowerDrive transmission to deliver higher torque at the cutting head, while a 12-inch cutting swath makes it easy to navigate around garden beds and sidewalks. The automatic feed spool keeps line length correct without bumping, and adjustable height plus a textured handle improves comfort for longer sessions. Because it is cordless and lightweight it starts quietly and avoids the fuss of gas tools, and the included wall-mountable charger simplifies storage. Expect solid performance on standard grass and moderate overgrowth; however the 12-inch head and single included 2.0 Ah battery limit runtime and may require slower passes or a second battery for large yards or very thick weeds. For homeowners focused on convenience and everyday trimming, this model balances ease of use with enough cutting power for typical light-to-moderate jobs.
Best for: Homeowners who want an easy-to-use, low-noise cordless trimmer for regular lawn touch-ups and clean edging around sidewalks and beds and who value simplicity and proven performance.
Less Ideal for: Those with several acres, dense brush, or frequent heavy clearing needs should look at higher-voltage cordless or gas-powered trimmers instead.
- Converts quickly between string trimmer and wheeled edger for two common tasks
- Automatic Feed Spool (AFS) keeps line fed without bumping
- PowerDrive transmission increases torque for stronger cutting at the head
- Lightweight with adjustable handle and height for comfortable use
- Includes 20V lithium-ion battery and charger so it is ready to use out of the box
- 12-inch cutting swath and single 2.0 Ah battery limit runtime and may be slow on large yards or very thick weeds
- Not suited for heavy-duty brush cutting compared with more powerful gas or higher-voltage cordless models
Verdict: A lightweight, easy-to-use 2-in-1 cordless trimmer that is ideal for everyday light-to-moderate lawn trimming and edging tasks.
Choosing the Right Lithium Cordless String Trimmer: Key Factors to Consider
Battery System and Run Time
Battery chemistry and capacity determine how long the trimmer will run between charges. For a typical yard, one battery might handle edging for 20 to 40 minutes depending on grass thickness. If you have a larger lawn or thick, wet grass, choose a machine that supports higher amp-hour cells or accepts multiple battery sizes.
Interchangeable battery platforms matter for gardeners who already own other cordless tools. Using the same battery across a hedge trimmer or mower simplifies charging and reduces the total number of batteries required. Also consider whether batteries charge quickly or if a spare battery is a practical investment for uninterrupted work.
Cutting Power and Motor Type
Motor power affects the trimmer's ability to handle dense grass, tall weeds, and light saplings. Brushless motors usually deliver more efficient power and longer motor life compared with brushed motors, which can heat up and wear faster under heavy load.
Look for a balance between power and battery draw. A very powerful motor will cut more cleanly but drain the battery faster. For most residential uses, a mid-range, efficient motor paired with a suitably sized battery delivers the best combination of cut quality and usable runtime.
Weight Distribution and Ergonomics
A lightweight trimmer reduces arm and shoulder fatigue, especially when trimming long borders or working on slopes. Equally important is how weight is distributed along the shaft and handle. A well-balanced tool feels lighter in use and is easier to maneuver for precise edging.
Adjustable shafts, telescoping handles, and secondary support handles help you find a comfortable posture. Check for trigger placement and whether the tool allows continuous throttle locking for extended cuts without hand cramping. Small ergonomic choices add up over long sessions.
Line Feed, Head Design, and Maintenance
How the line is fed and replaced affects downtime and ease of use. Bump-feed heads provide quick line advancement but can tangle; automatic feed systems are more convenient but sometimes more complex to service. A head that accepts thicker line or offers quick-reload spools will speed maintenance in the yard.
Consider how easy it is to access the head for replacing line or cleaning debris. Also evaluate guard design and debris deflection since robust guards protect both the head and nearby plants during trimming.
Durability and Weather Resistance
Cordless trimmers live outside and are exposed to moisture, sun, and dirt. Materials and protective finishes influence how long the tool will last under those conditions. Sealed electrical components and corrosion-resistant shafts help prevent premature failure when stored in a garage or shed.
Simple, repairable designs with replaceable components extend lifespan. Check whether common wear parts like spools, bump knobs, and guards are easy to source. A trimmer that is easier to service will stay operational across seasons with minimal replacement parts.
Noise, Vibration, and Neighborhood Use
Battery trimmers are generally quieter than gas models, but noise level still matters for early morning or late evening maintenance. Lower-noise motors and insulated housing reduce disturbance to neighbors and make long trimming sessions more pleasant.
Vibration affects both comfort and control. Excessive vibration can lead to hand fatigue and make precise edging harder. Look for anti-vibration features, rubberized grips, or balanced designs that minimize transmitted vibration to your hands.
Matching Trimmer Size to Yard Workload
Think about how you use a string trimmer. For small yards and light touch-ups, a lighter, lower-capacity trimmer paired with a single battery may be ideal. For larger lawns or frequent heavy trimming, choose a model designed to accept higher-capacity cells or multiple batteries so you can extend run time without long charging pauses.
Also consider the length and type of shaft. Straight shafts provide reach and are better for general trimming, while curved shafts can be lighter and easier to store. Shaft length affects posture and leverage, so pick a size that keeps your back and shoulders comfortable during typical sessions.
- Short sessions and narrow beds: prioritize weight and compact storage
- Frequent, long sessions: prioritize battery capacity and quick swap options
- Tall or tangled growth: prioritize cutting power and sturdier line options
Battery Care and Charging Best Practices
Proper battery care extends usable life and preserves run time. Store batteries in a cool, dry place and avoid leaving them completely discharged for long periods. If you only trim seasonally, top up charge cells every few months rather than letting them sit fully depleted.
Use the charger and charging routine recommended by the battery platform. Fast charging is convenient but may slightly reduce long-term battery life if used exclusively. Keeping a single charged spare battery on hand is often more practical than relying on rapid charges between tasks.
- Avoid extreme temperatures when storing batteries
- Rotate through batteries to prevent deep discharge
- Inspect battery contacts and keep them clean
Line Types and When to Use Them
Trimmer line comes in round, twisted, serrated, and multi-sided profiles. Round line is quiet and adequate for general grass, while thicker or serrated line cuts through thicker weeds and light brush more effectively. Multi-sided or square line produces cleaner edges but can increase vibration and battery draw.
Choose a line diameter compatible with your trimmer head and the vegetation you expect to cut. Keep a small stock of the correct line and a spool preloaded if you frequently maintain long borders; swapping spools in the field saves time.
- Round line: best for regular lawn grass
- Serrated or multi-sided: better for dense weeds
- Thicker diameter: improves durability but reduces runtime
Storing and Winterizing Your Trimmer
Clean off grass clippings, sap, and dirt before long-term storage to prevent corrosion and blockages. Remove the battery before storing to protect the electronics and battery health. Wipe down the shaft and head, and inspect moving parts for wear or damage.
If you keep the tool outdoors in a shed or garage, use a simple cover to protect it from dust and moisture. Replace worn line, empty debris from the head, and check guard fasteners before the first use in spring to ensure safe operation.
- Remove and store batteries separately
- Clean and inspect the head and guard
- Keep spare line and basic tools with the trimmer
Improving Control for Precise Edging
If crisp edges are important, practice angle and speed. A slower walk speed combined with a steady head angle produces sharper borders. Using a straight shaft and a well-balanced trimmer makes it easier to hold a consistent cutting plane along sidewalks and beds.
Consider accessories like edging wheels or guide attachments that mount to the shaft to help maintain a uniform distance from hard surfaces. Those small changes can turn a decent trimming outcome into a professional-looking edge without extra effort.
- Walk at a controlled pace for even results
- Use shaft angle to control cut depth and edge profile
- Try simple accessories to maintain consistent spacing
How We Chose the Best Lithium Cordless String Trimmer
We started by focusing on features that matter in everyday yard use and excluded specialty commercial machines and two-stroke gas models. Our selection favored trimmers with proven battery platforms and common replacement options so homeowners can keep running time predictable. Key evaluation criteria included run time and battery compatibility to reflect real-world operating duration and ease of swapping cells; cutting power and line delivery to judge how cleanly the tool handles thicker grass and light weeds; weight and ergonomics to assess fatigue during edging and extended sessions; build durability and weather resistance for outdoor storage and seasonal use; and ease of maintenance including head access and line replacement. We also considered noise level and vibration because quieter, smoother tools are preferable in residential neighborhoods. Products were excluded if they relied on proprietary, hard-to-find batteries, lacked clear replacement line access, or were designed for commercial crews rather than home users. The final list emphasizes balanced performance across these practical dimensions so gardeners get tools that work reliably in real yards.
FAQ
How long will a lithium cordless string trimmer run on a single charge?
Run time depends on battery capacity, motor efficiency, and the thickness of the vegetation. Typical residential use ranges from 20 to 45 minutes per charge. Using a higher-capacity battery or carrying a spare extends workable time between charges.
Can I use the same battery across other garden tools?
Often yes. Many manufacturers design batteries to be interchangeable across a tool platform. Using the same battery for multiple tools reduces the number of chargers and spare cells you need, but confirm compatibility before assuming interchangeability.
Is a brushless motor worth paying extra for?
Brushless motors are usually more efficient, deliver better torque for the same battery draw, and require less maintenance than brushed motors. For frequent or heavy trimming, a brushless motor typically offers noticeable benefits in performance and battery life.
What line thickness should I use for my yard?
Match the line diameter to your trimmer head and yard vegetation. For regular lawn grass, thin to medium diameters work well. For thicker weeds or occasional brush, choose a larger diameter or a serrated/multi-sided profile to improve cutting durability.
How should I store the trimmer and batteries over winter?
Clean the tool, remove the battery, and store batteries in a cool, dry place with a partial charge. Wipe off any debris from the head and check for worn parts. This prevents corrosion and helps batteries retain capacity through storage.
Final Verdict
Prioritize the features that match how you use a trimmer: choose a higher-capacity battery and efficient motor for larger or tougher yards, or favor lighter weight and ergonomics for quick touch-ups and frequent edging. Line feed design and ease of maintenance determine how much downtime you will experience during a season. Balance run time, cutting power, and comfort to find the best lithium cordless string trimmer for your lawn. Focus on battery system compatibility and serviceable parts so the tool stays useful across seasons and tasks.
