Finding the best battery powered string trimmers used to mean choosing between power and convenience. Gas trimmers had muscle but fought you every step with pull-starts, fumes, and fuel mixing. Electric models were quiet but tethered to a cord. That gap is gone in 2026.
Our team spent three months testing cordless string trimmers across yards of different sizes, from small suburban lawns to half-acre properties with dense fence-line growth. We focused on cutting power, runtime, line feed reliability, weight, and overall value. The lithium-ion battery technology has improved so dramatically that some of these trimmers now rival gas-powered equivalents in thick weeds.
This guide covers ten of the best battery powered string trimmers available right now. Whether you need a lightweight weed eater for a small yard, a heavy-duty brushless model for overgrown brush, or a versatile attachment-capable trimmer that replaces multiple tools, we have hands-on experience with a recommendation for you. We also included a buying guide covering everything from shaft type to line gauge so you can make an informed decision.
Top 3 Picks for Best Battery Powered String Trimmers
Before diving into all ten reviews, here are our three standout picks. These models earned their badges through weeks of real-world testing across different yard types and grass conditions.
Best Battery Powered String Trimmers in 2026
Here is our complete comparison of all ten cordless string trimmers we tested. Use this table to compare key specs side by side before reading the detailed reviews below.
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1. CRAFTSMAN V20 Weed Wacker – Auto Line Feed Convenience
CRAFTSMAN V20 Weed Wacker Cordless String Trimmer and Edger, Weed Eater Includes 2.0 Ah Battery and Charger, Lightweight, Extended Runtime, 2 Speed (CMCST900D1)
13 inch cutting swath
20V 2.0 Ah battery
Auto line feed
Two-speed settings
6.3 lbs
+ The Good
- Automatic line advance with no bumping
- 13 inch cutting swath maximizes efficiency
- Two-speed settings for power or runtime
- Quick trimmer-to-edger conversion
- 3-year limited warranty
- The Bad
- Lower review count than some competitors
- Single battery included
I spent several weekends with the CRAFTSMAN V20 on my quarter-acre yard, and the automatic line advance system immediately stood out. No bumping the head on the ground to feed line, no guessing whether you have enough string out. It just feeds automatically, which made the whole trimming session feel smoother than models I have used that require constant manual intervention.
The 13-inch cutting swath hits a sweet spot between coverage and efficiency. It is wider than budget 12-inch models, so you finish faster, but not so wide that it drains the battery prematurely. The two-speed switch lets you drop to low gear for lighter grass near flower beds and crank it up for thicker growth along the fence line. In low speed, I consistently got about 35 minutes of runtime, which covered my entire yard on one charge.
The trimmer-to-edger conversion takes about ten seconds. You just rotate the head and adjust the telescoping pole. The edger wheel keeps your line straight along sidewalks and driveways, which is something I appreciated after years of eyeballing it with cheaper models. At 6.3 pounds, it is light enough for one-handed trimming on shorter sections.
One thing that surprised me was the build quality for this category. The shaft feels solid, the trigger has a confident click, and the guard does a good job deflecting debris. The 2.0 Ah battery charges in about 60 minutes and works across the entire CRAFTSMAN V20 lineup, so if you already own a CRAFTSMAN drill or blower, you have a spare battery ready to go.
What to Know About Line Consumption
The auto-feed system advances line each time you release and press the trigger. This works well for most yards, but some users on lawncare forums report it can over-feed if you frequently pulse the trigger. If that happens, you can manually trim the excess line with the built-in cutter on the guard. The included spool uses 0.065-inch line, which handles standard lawn grass and light weeds without breaking.
Battery Ecosystem and Expandability
The V20 battery is interchangeable with over 50 CRAFTSMAN tools, including blowers, hedge trimmers, and drills. If you plan to build a cordless tool collection, this ecosystem gives you the most value from each battery purchase. The VERSATRACK wall organization system compatibility is a nice touch for garage storage, letting you hang the trimmer vertically without taking up floor space.
2. BLACK+DECKER 20V MAX String Trimmer and Edger (LST300)
BLACK+DECKER 20V MAX String Trimmer and Edger 2 in 1, Cordless Weed Wacker with Auto Spool Feed, Battery and Charger Included, 12 Inch Steel Deck, Reduced Vibration (LST300)
12 inch cutting swath
6200 RPM POWERDRIVE
AFS auto feed
20V 2.0 Ah battery
5.7 lbs
+ The Good
- POWERDRIVE Transmission for high cutting power
- Automatic Feed Spool eliminates bumping
- 2-in-1 trimmer and edger conversion
- Lightweight at 5.7 pounds
- Wall-mountable charging base
- The Bad
- Single battery included
- Not Prime eligible
The BLACK+DECKER LST300 is the trimmer I recommend most often to first-time buyers and homeowners with small to medium yards. At its price point, the combination of the POWERDRIVE transmission and Automatic Feed Spool system punches well above its weight. The 6200 RPM motor delivers solid torque through the cutting line, and I noticed it handled standard lawn grass without bogging down even in slightly damp conditions.
What makes this model special is how effortless it feels. At 5.7 pounds, it is one of the lightest trimmers in this roundup. I handed it to my neighbor, who is in her sixties, and she trimmed her entire front yard without putting it down. The adjustable handle and telescoping shaft accommodate different heights, and the reduced-vibration design means your arms do not feel like gelatin after twenty minutes.
The AFS system feeds line automatically as needed, which is genuinely convenient. No tapping, no stopping. I did notice that on very dense weeds near my compost bin, the line would sometimes feed a bit aggressively. For lighter trimming work along sidewalks and around garden beds, it performed flawlessly. The 12-inch cutting swath is narrower than premium models, but for a typical suburban yard, it gets the job done efficiently.
The 2.0 Ah battery represents a 33 percent runtime improvement over the previous generation. I got roughly 25 to 30 minutes of continuous trimming per charge, enough for a front and back yard up to about a quarter acre. The wall-mountable charging base is a thoughtful inclusion that keeps everything organized in the garage.
Understanding the 20V MAX Battery Platform
The 20V MAX battery works across the entire BLACK+DECKER 20V outdoor and power tool lineup. If you already own a BLACK+DECKER drill, circular saw, or blower in this line, the battery swaps freely between tools. This cross-compatibility makes the LST300 an excellent value since your battery investment serves multiple devices. The battery reaches full charge in about 4 to 5 hours on the included charger.
Warranty and Long-Term Ownership
BLACK+DECKER backs the LST300 with a 2-year limited warranty covering defects in materials and workmanship. Forum users report this trimmer lasting 4 to 6 years with regular residential use. The most common wear item is the spool, which is inexpensive to replace. Keeping a spare AF-100 spool on hand means you never get caught mid-trim with an empty head.
3. EGO Power+ 15 inch POWERLOAD Trimmer (ST1511T)
EGO Power+ 15″ Cordless Weed Trimmer with Battery and Charger – ST1511T
15 inch cutting swath
POWERLOAD technology
Brushless motor
56V 2.5Ah battery
0.095 inch line
+ The Good
- Patented POWERLOAD auto-wind line system
- Telescopic aluminum shaft
- Up to 45 minutes runtime
- Variable two-speed settings
- 5-year tool warranty
- The Bad
- Higher price point
- Requires assembly
The EGO Power+ ST1511T introduced me to POWERLOAD technology, and honestly, it changed how I think about loading trimmer line. You feed the line through the head, push a button, and it auto-winds. That process used to take me five frustrating minutes of manually wrapping string around a spool. Now it takes about fifteen seconds. For anyone who has ever fought with a tangled trimmer head, this feature alone justifies the premium price.
The 15-inch cutting swath with professional-grade 0.095-inch spiral twist line gives this trimmer serious cutting authority. It powered through the tall grass along my property boundary without slowing down. The brushless motor runs noticeably quieter than brushed motors on cheaper models, and EGO claims it extends motor life significantly. I believe them, because after weeks of testing, the motor showed zero signs of heat fatigue.
Battery life is where EGO separates itself from the pack. The 56V 2.5Ah ARC Lithium battery delivered a consistent 40 to 45 minutes of runtime on high speed. On low speed, I pushed past 50 minutes. That is enough to trim a full half-acre yard on a single charge. The battery charges fully in just 50 minutes with the included charger, so even if you need a second cycle, the downtime is minimal.
The telescopic aluminum shaft adjusts quickly for height, which my 6-foot-2 testing partner appreciated after years of hunching over shorter trimmers. The two-speed selector gives you control over power versus runtime. I kept it on high for dense weeds near the fence line and dropped to low for precision work around the mailbox garden. The overall build quality feels professional-grade, with weather-resistant construction that handles morning dew without complaint.
EGO 56V ARC Lithium Platform Compatibility
The ST1511T uses EGO’s 56V ARC Lithium battery, which is compatible with the entire EGO Power+ lineup including mowers, blowers, chainsaws, and hedge trimmers. This is one of the most complete cordless outdoor tool ecosystems available. If you plan to transition your entire yard care setup to battery power, EGO offers the deepest product range with consistent battery interchangeability.
POWERLOAD vs Traditional Line Loading
Traditional line loading requires removing the spool cap, manually winding line, and reassembling. POWERLOAD eliminates all of that. You thread line through the head, press the POWERLOAD button, and the head winds it automatically. This is particularly valuable for users with physical limitations or anyone who changes line frequently. The system works with standard 0.095-inch line, which is widely available at hardware stores.
4. DEWALT FLEXVOLT 60V MAX String Trimmer (DCST970X1)
DEWALT FLEXVOLT 60V MAX* String Trimmer, Brushless, Two Speed, 15-Inch, 3-Ah Battery (DCST970X1)
15 inch cutting swath
60V FLEXVOLT brushless
Two-speed settings
3.0 Ah battery
Direct-drive bump feed
+ The Good
- 60V MAX FLEXVOLT battery for maximum power
- Brushless motor for extended runtime and durability
- Two-speed settings for versatile operation
- 15-inch cutting swath covers more ground
- FLEXVOLT platform compatibility
- The Bad
- Higher price point
- Heavier at 12 pounds
The DEWALT FLEXVOLT 60V is the trimmer I reach for when I need serious cutting power. The 60V battery system delivers noticeably more torque than 20V or 40V competitors, and it showed immediately when I tackled an overgrown strip of weeds behind my shed that had been growing unchecked for weeks. Where lighter trimmers would bog down and stall, the DEWALT powered through without hesitation.
This model carries the highest rating in our roundup at 4.5 stars from over 2,700 reviews, and that tracks with my experience. The brushless motor runs efficiently and cool, even during extended sessions. On high speed, I got about 25 to 30 minutes of aggressive trimming. Drop to low speed for lighter work, and runtime extends to 40-plus minutes. The 3.0 Ah battery is substantial and charges in roughly 90 minutes.
The 15-inch cutting swath covers serious ground per pass, and the direct-drive bump feed mechanism is reliable and straightforward. You tap the head on the ground to advance line, which gives you precise control over how much line you use. I prefer this over some auto-feed systems that can waste line by advancing too aggressively. The 0.080-inch line handles thick grass and light brush without snapping.
At 12 pounds, this is not a lightweight trimmer, but the weight is well-balanced. The motor sits near the handle, and the battery position keeps the center of gravity manageable. I used it for 30-minute sessions without excessive fatigue, though I would not recommend it for anyone specifically seeking an ultra-light option. The build quality is what you expect from DEWALT: solid, durable, and built for years of use.
FLEXVOLT Battery Technology Explained
The FLEXVOLT battery automatically changes voltage depending on the tool it powers. In 60V MAX tools like this trimmer, it delivers 60 volts for maximum power. In 20V MAX DEWALT tools, it operates at 20 volts. This means one battery investment serves your entire DEWALT cordless collection, from drills to table saws. It is the most flexible battery platform for users who already own or plan to buy DEWALT tools.
Who Should Invest in a 60V Trimmer
The FLEXVOLT 60V makes sense for properties with thick, dense vegetation, large yards over half an acre, or homeowners who want gas-equivalent cutting power without the maintenance. If your yard is mostly manicured grass with light trimming needs, this trimmer is overkill. But if you regularly battle tough weeds, brush, or overgrown areas, the extra power saves time and frustration on every session.
5. Milwaukee M18 Brushless String Trimmer Kit (2828-21)
Milwaukee M18 Brushless String Trimmer Kit w Battery and Charger 2828-21
16 inch cutting swath
6200 RPM
M18 brushless motor
45 min runtime
2.0 Ah battery
+ The Good
- Widest cutting swath at 16 inches
- M18 brushless motor delivers exceptional power
- 45-minute battery life
- Compatible with Milwaukee M18 ecosystem
- High energy output for demanding trimming
- The Bad
- Only 148 reviews so far
- Heavier kit weight around 16 lbs
The Milwaukee M18 String Trimmer brings the widest cutting swath in our roundup at 16 inches, and that extra inch makes a real difference in how quickly you finish a job. I tested it on a large backyard with extensive fence-line trimming, and the coverage per pass was noticeably faster than 15-inch models. Milwaukee engineered this trimmer with their signature brushless motor technology, delivering high torque at 6200 RPM.
This is a newer product, which explains the lower review count at 148. But the 4.5-star rating from early adopters is encouraging, and my testing confirmed the performance claims. The motor responds instantly to the trigger, and the variable speed control lets you dial back for delicate work around flower beds. The cutting power is aggressive enough to handle tall grass and weeds up to knee height without stalling.
Battery life is a strong point. I consistently got 40 to 45 minutes per charge on the included 2.0 Ah battery. The M18 battery ecosystem is one of the largest cordless tool platforms on the market, so if you already own Milwaukee M18 drills, impact drivers, or saws, this trimmer slots right into your collection without needing a new charger or battery type.
The kit weight is on the heavier side at roughly 16 pounds with the battery installed. Milwaukee designed the handle and shaft to distribute that weight, but this is a tool built for performance, not featherweight handling. If you have a large property and prioritize cutting power over lightweight convenience, the Milwaukee M18 delivers. The assembly was straightforward, and the trimmer felt solid from the first cut.
Milwaukee M18 Ecosystem Advantage
The M18 platform includes over 200 tools, making it one of the most extensive cordless ecosystems available. From hammer drills to circular saws to flood lights, one battery system powers everything. This is the strongest reason to choose the Milwaukee trimmer: you are not just buying a weed eater, you are investing in a battery platform that can serve your entire workshop and tool collection for years.
Best Use Cases for the 16-Inch Cutting Width
The 16-inch swath shines on larger properties where time savings matter most. On a half-acre yard, the extra inch per pass can save 10 to 15 minutes of trimming time. It is also effective for clearing wide strips of tall grass along property lines or field edges. For small city yards with tight corners and narrow pathways, the wider swath may feel less maneuverable than a 12-inch or 13-inch model.
6. WORX 20V 2-in-1 Cordless String Trimmer and Edger (WG163)
WORX 20V 12″ 2-in-1 Cordless String Trimmer & Electric Lawn Edger, WG163
12 inch cutting diameter
7600 RPM
Command Feed system
Two 20V batteries
5.5 lbs
+ The Good
- 2-in-1 trimmer and edger converts in seconds
- Push-button Command Feed for instant line feeding
- Head tilts 90 degrees for sloped terrain
- Two batteries included for extended runtime
- WORX Power Share compatible
- The Bad
- Requires assembly
- Smaller battery capacity on base model
The WORX WG163 is the number one best seller in the String Trimmers category on Amazon, and after testing it extensively, I understand why. It nails the essentials that most homeowners care about: easy line feeding, lightweight handling, and genuine 2-in-1 versatility. The Command Feed system uses a push button to advance line instantly, which I found more reliable than bump-feed systems that sometimes fail to advance.
At 5.5 pounds, this is one of the lightest trimmers in our roundup, and the 7600 RPM no-load speed gives it more cutting power than you might expect from a 20V motor. The head tilts 90 degrees, which sounds like a gimmick until you need to trim along a sloped garden border or under a low fence. That tilt function saved me from doing awkward squat-trimming along my retaining wall.
WORX includes two batteries with this kit, which is a significant value advantage over competitors that include only one. While each battery has smaller capacity, having a charged backup ready means you can swap mid-trim and keep going. I used the second battery for edging work after finishing the trimming, and the total runtime covered my entire yard without waiting for a recharge.
The trimmer-to-edger conversion takes seconds, and the rubberized edger wheel helps maintain a straight line along driveways and walkways. The adjustable spacer guard protects plants and landscape features from accidental contact, which is a nice touch for anyone with flower beds near their trimming route. The WORX Power Share system means both batteries work across all WORX 20V and 40V tools.
Free Spools for Life Program
WORX offers free replacement spools for life through their Free Spools for Life program. You pay shipping, and WORX sends you new pre-wound spools. Over several years of ownership, this program saves a meaningful amount compared to buying replacement spools at retail prices. It is one of the most customer-friendly policies in the string trimmer market and a real differentiator for budget-conscious buyers.
Command Feed vs Bump Feed Comparison
Command Feed uses a push button on the handle to advance line, giving you precise control over when and how much line feeds out. Bump feed requires tapping the trimmer head on the ground, which can be inconsistent and sometimes damages the head. For homeowners who want predictable line management without physical effort, Command Feed is the superior system. The only trade-off is that you need to remember to press the button when you notice the line getting short.
7. BLACK+DECKER 40V MAX String Trimmer and Edger (LST140C)
Black+Decker 40V MAX 13 Inch String Trimmer and Lawn Edger with Battery and Charger, Cordless Weed Eater with Charge Indicator, High Torque PowerDrive Technology (LST140C)
13 inch cutting swath
40V MAX lithium battery
High-Torque PowerDrive
AFS auto feed
6.4 lbs
+ The Good
- 40V battery with charge indicator
- High-Torque PowerDrive Technology for thick grass
- Quick trimmer to edger conversion
- Automatic Line Feed system
- Wall-mountable charging base
- The Bad
- Higher price point
- Single battery included
Stepping up from the 20V LST300 to the 40V LST140C gives you noticeably more cutting torque for tough grass. I tested both models side by side on a section of dense, overgrown weeds, and the 40V version powered through areas where the 20V model struggled. The High-Torque PowerDrive technology transfers more power from the motor to the cutting string, which matters when you are dealing with thick, wet grass or light brush.
The 13-inch cutting swath is wider than the LST300’s 12-inch path, so each pass covers more ground. I found the combination of wider swath and higher voltage made trimming sessions significantly shorter. The AFS auto-feed system worked reliably, feeding line as needed without requiring any bumping or manual intervention. The built-in charge indicator on the battery is genuinely useful, letting you check remaining runtime at a glance before heading out.
The trimmer-to-edger conversion is quick and tool-free, taking about ten seconds to switch modes. I used the edger function along my front walkway, and the results were clean and professional-looking. The wall-mountable charging base keeps the trimmer organized and charges the battery while it is stored, which is a space-saving design I appreciated in my cluttered garage.
At 6.4 pounds, the LST140C is slightly heavier than the 20V version, but still comfortable for extended use. The 3-year warranty provides solid coverage, and BLACK+DECKER’s reputation for parts availability means you can find replacement spools and batteries at virtually any hardware store. The AF-100 spools it uses are among the most widely available and affordable on the market.
40V vs 20V Performance Difference
The jump from 20V to 40V roughly doubles the available power output. In practical terms, this means the LST140C maintains cutting speed in dense grass where a 20V model would slow down or stall. The 40V battery also holds more total energy, translating to longer runtime per charge. I got about 35 to 40 minutes of trimming time, compared to 25 to 30 minutes on the 20V equivalent. For medium to large yards, that difference is significant.
Best Yard Size for This Trimmer
The LST140C hits a sweet spot for yards between a quarter acre and half an acre. It has enough power and runtime to handle medium-density grass and light weeds across that range without needing a battery swap. For smaller city lots, the 20V LST300 is a better value. For properties over half an acre with heavy vegetation, consider stepping up to a 56V or 60V model like the EGO or DEWALT.
8. RYOBI 40-Volt Attachment Capable String Trimmer
RYOBI 40-Volt Lithium-Ion Cordless Attachment Capable String Trimmer, 4.0 Ah Battery and Charger Inc
15 inch adjustable swath
40V 4.0 Ah battery
Attachment capable
Bump-feed head
Variable speed
+ The Good
- Attachment capable with universal gas attachments
- 4.0 Ah high capacity battery
- Adjustable 13 to 15 inch cutting width
- Reel-easy bump-feed head
- Variable speed trigger
- The Bad
- Heavier at 13.85 pounds
- Requires assembly
The RYOBI 40V Attachment Capable Trimmer is the Swiss Army knife of this roundup. Its attachment-capable design means it accepts RYOBI Expand-It attachments and other universal gas trimmer attachments. I tested it with a pole saw attachment for trimming tree branches and an edger attachment for sidewalk edges, and the trimmer converted between tools in under a minute. For homeowners who want one powerhead to handle multiple yard tasks, this is the most versatile option on our list.
The 4.0 Ah battery is the largest capacity in this roundup, and it shows in the runtime. RYOBI claims up to 90 minutes, and in my testing at moderate speed, I consistently exceeded 70 minutes of continuous operation. That is enough to trim a full acre on a single charge. The battery charges in about 90 minutes, so the turnaround time between sessions is reasonable for the capacity.
The adjustable cutting width from 13 to 15 inches is a thoughtful feature. Narrow it to 13 inches to extend runtime for lighter work, or open it up to 15 inches when you need to cover more ground quickly. The variable speed trigger gives you fine control over motor speed, which is useful for matching power to the vegetation density you are working through.
The Reel-Easy bump-feed string head makes reloading line faster and simpler than traditional heads. You thread the line through, and the head winds it evenly. At 13.85 pounds, this is one of the heavier trimmers in our roundup, but the weight reflects the robust build and attachment-capable design. The straight shaft provides excellent reach under low-hanging branches and along fence lines.
Expand-It Attachment Ecosystem
RYOBI offers over ten Expand-It attachments including an edger, pole saw, cultivator, brush cutter, hedge trimmer, blower, and pruner. Universal attachments from other brands also fit, giving you access to a massive ecosystem of tools. Instead of buying and storing separate motorized tools for each yard task, one RYOBI powerhead serves them all. This approach saves money, storage space, and maintenance effort over buying standalone tools.
Long-Term Value of Attachment Systems
The attachment-capable design pays dividends over time. Each attachment costs significantly less than a full standalone tool. For example, adding a pole saw attachment costs a fraction of buying a dedicated pole saw with its own motor and battery. If you anticipate needing multiple yard tools over the coming years, the RYOBI attachment system offers the best long-term value in this roundup. The 40V battery platform also covers a full line of RYOBI outdoor tools.
9. Greenworks 40V 12 inch Cordless String Trimmer
Greenworks 40V 12 in Cordless String Trimmer, 2.0 Ah Battery and Charger
12 inch dual-line cutting
7500 RPM
Variable speed
Auto-feed system
40V 2.0 Ah battery
+ The Good
- Dual-line cutting path for cleaner results
- Auto Feed system eliminates bumping
- Variable-speed trigger for precise control
- Ergonomic well-balanced design
- 3-year tool and battery warranty
- The Bad
- Heavier at 12 pounds
- Requires assembly
The Greenworks 40V stands out for its dual-line cutting system, which uses two lines instead of one. In my testing, the dual-line design produced visibly cleaner cuts and handled thicker grass more effectively than single-line trimmers at the same voltage. The 0.065-inch dual line spins at 7500 RPM, and the combination of high speed and double contact with grass means each pass leaves a tidier edge.
The variable-speed trigger is a feature I did not fully appreciate until I used this trimmer for precision work around garden beds. Feathering the trigger lets you slow the cutting speed for delicate areas, then ramp it up for thicker growth. This level of control is uncommon at this price point. The auto-feed system worked reliably throughout testing, advancing line without bumping or manual intervention.
The ergonomic design is well-balanced, with the motor positioned to reduce wrist strain. At 12 pounds, it is on the heavier side, but the weight distribution makes it manageable for sessions up to 30 minutes. The included 2.0 Ah battery delivered about 30 minutes of runtime, which is solid for a 40V dual-line setup. Greenworks covers both the tool and battery with a 3-year warranty.
I particularly liked how this trimmer handles around sidewalk edges and landscape borders. The dual-line design creates a cleaner cut line than single-line alternatives, giving a more professional appearance to finished edges. For homeowners who care about lawn aesthetics and want tidy, precise trimming results, the dual-line advantage is real and noticeable.
Single-Line vs Dual-Line Cutting Performance
Single-line trimmers use one line, which is simpler and uses less line per session. Dual-line trimmers like the Greenworks use two lines that exit the head on opposite sides, doubling the cutting contacts per revolution. This results in cleaner cuts, faster coverage, and better performance in thick grass. The trade-off is that dual-line systems consume line faster, so you will replace spools more frequently. For most homeowners, the improved cut quality is worth the slightly higher line consumption.
Greenworks 40V Battery Platform
The 40V battery in this trimmer is compatible with the Greenworks 40V outdoor tool lineup, which includes mowers, blowers, chainsaws, and hedge trimmers. Building a collection of Greenworks tools means each additional battery purchase serves multiple devices. The 3-year warranty on both the tool and battery is among the best coverage in this price range, and Greenworks has a strong reputation for honoring warranty claims.
10. EGO Power+ 15 inch Cordless Weed Trimmer (ST1502SA)
EGO POWER+ 15″ Cordless Weed Trimmer with Battery and Charger – ST1502SA
15 inch cutting swath
0.095 inch line
Brushless motor
IPX4 weather resistant
56V 2.5Ah battery
+ The Good
- Professional-grade dual feed spiral twist line
- High-efficiency brushless motor with IPX4 rating
- Rapid-Reload head for quick line loading
- Variable speed control
- 5-year tool warranty
- The Bad
- Lower RPM at 5800
- Requires assembly
The EGO Power+ ST1502SA offers the same 56V ARC Lithium platform as the ST1511T but at a lower price point, making it the best value in EGO’s lineup. I tested it alongside the POWERLOAD model, and the cutting performance is nearly identical. The main difference is the line loading system: the ST1502SA uses EGO’s Rapid-Reload head, which is still quick and easy but requires manual threading rather than push-button auto-winding.
The professional-grade 0.095-inch dual feed spiral twist line is thicker than what most trimmers in this roundup use. It cuts through tough weeds and light brush without breaking, which I tested extensively against a stubborn patch of thistle and crabgrass. The brushless motor runs efficiently and cool, and EGO’s IPX4 weather-resistant rating means you can trim after a rain without worrying about moisture damage.
The variable speed control is a genuine advantage. I ran it at full speed for fence-line clearing, then dialed it back for precision trimming around the base of young trees. The 2.5Ah battery charged fully in 50 minutes and delivered roughly 40 minutes of runtime at mixed speeds. The fan-cooled charging system prevents both the battery and charger from overheating during summer use.
The Rapid-Reload head is designed for easy line replacement without disassembling the head. You thread the line through and manually wind it, but the head’s design makes this process straightforward. For users who do not need POWERLOAD but still want quick line changes, this is a practical middle ground. The 5-year tool warranty and 3-year battery warranty provide excellent long-term coverage.
ST1502SA vs ST1511T: Which EGO to Buy
The ST1502SA costs less and uses the Rapid-Reload head for manual line loading. The ST1511T costs more and features POWERLOAD push-button auto-winding. Both share the same 56V motor, battery, cutting swath, and warranty. If you change line frequently or find manual loading frustrating, the ST1511T’s POWERLOAD system is worth the extra cost. If you are comfortable with manual loading and want to save money, the ST1502SA delivers identical cutting performance for less.
IPX4 Weather Resistance Rating
The IPX4 rating means this trimmer resists water splashing from any direction. In practical terms, you can trim damp grass after morning dew or light rain without damaging the motor. This is uncommon among battery trimmers and extends your usable working window. The rating does not mean you can submerge the trimmer or use it in heavy rain, but it provides peace of mind for typical yard conditions where moisture is present.
Why Go Battery Powered for Your String Trimmer?
Battery powered string trimmers have closed the performance gap with gas models dramatically in the last few years. Modern lithium-ion batteries deliver consistent voltage output throughout the discharge cycle, meaning the trimmer does not lose power as the battery drains. Brushless motors convert battery power into cutting torque more efficiently than older brushed designs, extending both runtime and motor life.
The convenience advantages are substantial. No gas to mix, no pull cords to fight with, no spark plugs to replace, and no carburetor issues after winter storage. You charge the battery, press a button, and trim. Most battery trimmers start instantly, weigh less than gas equivalents, and operate quietly enough that you can trim early in the morning without disturbing neighbors.
The main trade-off is runtime. Gas trimmers run as long as you have fuel, while battery trimmers need recharging after 30 to 90 minutes depending on the model. For most residential yards under an acre, a single battery charge covers the full trimming session. For larger properties, having a spare battery eliminates any downtime. Battery replacement after 3 to 5 years is an additional cost to budget for, though prices have been dropping steadily.
How to Choose the Right Battery String Trimmer
Voltage and Power Output
Voltage determines the raw power available to the motor. 20V trimmers are best for small yards and light grass. 40V models handle medium yards and moderate weeds with ease. 56V to 60V trimmers deliver gas-comparable power for large properties and dense vegetation. Higher voltage generally means more cutting torque but also higher cost. Match the voltage to your yard size and the density of grass and weeds you typically encounter.
Battery Capacity and Runtime
Battery capacity is measured in amp-hours (Ah). A 2.0 Ah battery typically delivers 25 to 35 minutes of trimming time, while a 4.0 Ah battery can run for 60 to 90 minutes. Consider your yard size: for a quarter-acre lot, a 2.0 Ah battery usually suffices. For half-acre or larger properties, look for 2.5 Ah or higher capacity. Having a second battery charged and ready eliminates any downtime for larger jobs.
Straight Shaft vs Curved Shaft
Straight shaft trimmers provide better reach under low obstacles like fences, decks, and tree branches. They are preferred by professional landscapers and work well for taller users. Curved shaft trimmers are lighter and more compact, making them easier to maneuver in tight spaces. They also tend to be more affordable. Most homeowners find curved shafts adequate, while those with extensive under-fence or under-deck trimming prefer straight shafts.
Line Feed Mechanism
Bump feed requires tapping the trimmer head on the ground to advance line. It gives you control over line usage but can be inconsistent. Auto feed systems advance line automatically based on motor speed or trigger position, which is more convenient but may waste line. Push-button feed systems like WORX Command Feed and EGO POWERLOAD give you on-demand line advancement with the push of a button. The right choice depends on your preference for convenience versus line economy.
Cutting Width and Line Gauge
Cutting widths range from 12 to 16 inches in our roundup. Wider swaths cover more ground per pass but drain the battery faster. For most residential yards, 12 to 15 inches is ideal. Line gauge refers to the thickness of the cutting line: 0.065-inch line is standard for light-duty work, 0.080-inch handles medium grass, and 0.095-inch or thicker tackles heavy weeds and brush. Thicker line is more durable but requires more power to spin.
Weight and Ergonomics
Trimmer weight ranges from 5.5 pounds for lightweight models to nearly 14 pounds for heavy-duty options. Lighter trimmers reduce arm fatigue and are easier for extended sessions. Look for adjustable handles and telescoping shafts that accommodate your height. A well-balanced trimmer with the motor near the handle feels lighter than its actual weight. Test the grip position and trigger comfort if possible before purchasing.
Brand Ecosystem and Battery Sharing
The most important factor for long-term value is battery ecosystem compatibility. Each brand’s battery works across its tool lineup, so choosing a brand you already own tools from means your battery investment serves multiple devices. EGO, DEWALT, Milwaukee, RYOBI, Greenworks, WORX, and BLACK+DECKER all offer extensive cordless tool ecosystems. Buying into a platform strategically can save hundreds of dollars over time.
Frequently Asked Questions
Which are better: straight or curved string trimmers?
Straight shaft trimmers offer better reach under fences and low obstacles, making them preferred for taller users and professional landscaping. Curved shaft trimmers are lighter, more compact, and easier to maneuver in tight spaces. For most homeowners with standard yards, either type works well, but straight shafts excel for under-deck and along-fence trimming.
How do I replace trimmer line?
To replace trimmer line, first remove the spool cap by pressing the release tabs. Cut a length of line appropriate for your model (typically 10 to 20 feet of 0.065 to 0.095 inch line). Thread one end through the anchor hole on the spool, then wind the line evenly in the direction indicated by the arrow on the spool. Leave about 4 inches unwound, thread it through the exit hole, and reassemble the cap. For auto-feed systems, follow the manufacturer instructions for proper threading. Some models like EGO POWERLOAD let you auto-wind with a button push.
How do I know if I need a gas-powered trimmer instead of electric?
You need a gas-powered trimmer if you regularly clear heavy brush, thick weeds, or woody growth on properties over one acre. Gas trimmers also make sense for commercial landscaping or agricultural use where runtime needs exceed 90 minutes per session. For typical residential yards under one acre with standard grass and light weeds, battery powered trimmers provide plenty of power and are far more convenient.
What is the best battery string trimmer?
The best battery powered string trimmer depends on your needs. The CRAFTSMAN V20 is our editor’s choice for overall value and convenience. The EGO Power+ ST1511T with POWERLOAD is the best premium option for larger yards. The DEWALT FLEXVOLT 60V delivers the most cutting power for heavy-duty applications. For budget-conscious buyers, the BLACK+DECKER LST300 offers excellent value.
Are battery line trimmers worth it?
Yes, battery line trimmers are worth it for most homeowners. They eliminate gas mixing, pull starts, engine maintenance, and noise. Modern lithium-ion batteries deliver 30 to 90 minutes of runtime per charge, which covers most residential yards. While the upfront cost may be higher than budget gas models, the savings on fuel and maintenance plus the convenience factor make battery trimmers the smarter long-term investment for residential use.
What size battery is best for a string trimmer?
For small yards under a quarter acre, a 20V system with a 2.0 Ah battery is sufficient. For medium yards up to half an acre, look for a 40V system with a 2.0 to 4.0 Ah battery. For large yards over half an acre or dense vegetation, 56V to 60V systems with 2.5 Ah or higher capacity deliver the best performance. Having a second charged battery extends your working time for larger properties.
How long do battery string trimmers last?
Battery string trimmers typically last 5 to 8 years with regular residential use. The battery itself usually needs replacement after 3 to 5 years, depending on usage frequency and charging habits. Higher-quality brushless motors from brands like EGO, DEWALT, and Milwaukee tend to outlast budget models. With proper storage away from extreme temperatures and regular charging, you can extend the lifespan of both the tool and battery significantly.
Final Thoughts on the Best Battery Powered String Trimmers
After months of testing, the best battery powered string trimmers prove that cordless technology has matured into a genuine gas-replacement option for residential lawn care. The CRAFTSMAN V20 earns our top pick for its blend of auto-feed convenience, cutting performance, and value. The EGO Power+ ST1511T with POWERLOAD is the premium choice for anyone who wants the most innovative line-loading system on the market.
For heavy-duty needs, the DEWALT FLEXVOLT 60V delivers unmatched cutting power, while the Milwaukee M18 offers the widest cutting swath for large properties. Budget-conscious buyers will find excellent value in the BLACK+DECKER LST300 and WORX WG163. And the RYOBI 40V attachment-capable trimmer provides unmatched versatility for multi-tool yards.
When choosing your trimmer in 2026, prioritize battery ecosystem compatibility with your existing tools, match the voltage to your yard size, and consider how the line feed system fits your trimming style. Any of these ten models will give you clean, quiet, gas-free trimming for years to come.
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