8 Best Battery String Trimmers (October 2026)
The best battery string trimmers include the WORX WG163 20V 2-in-1 Trimmer and Edger for small yard upkeep, the BLACK+DECKER 20V MAX 2-in-1 Trimmer and Edger for straightforward weekly trimming, and the EGO Power+ ST1502SA 15-Inch Trimmer for long open borders.
On this page (8 sections)
- How we chose the best battery string trimmers
- Compare the best battery string trimmers
- Which battery string trimmer fits your yard?
- How should you choose a battery trimmer for your yard?
- How do you set up a battery string trimmer correctly?
- How can you get cleaner cuts and longer battery sessions?
- What care and common mistakes matter most?
- Which best battery string trimmer should you buy?
The best battery string trimmer for most small yards is the WORX WG163, which combines wheeled edging, button-controlled line feed and 2 included batteries. Choose the EGO ST1502SA for long open borders, or the ST1511T when adjustable reach and powered line winding matter more.
Buy for the trimming route you actually follow: fence lines, beds, sidewalk edges and spots the mower misses. Lawn acreage matters less when most of the grass is easy to reach with a mower.
Our cordless string trimmer buying guide covers the wider category. For a shortlist centered on routine upkeep, compare our best string trimmers for home use.
Our picks at a glance
-
1
Best for small yard upkeepWORX WG163 20V 2-in-1 Trimmer and Edger
9.2/10 our score
See it on Amazon -
2
Best for straightforward weekly trimmingBLACK+DECKER 20V MAX 2-in-1 Trimmer and Edger
8.9/10 our score
See it on Amazon -
3
- 4
Check itGreenworks 40V 12-Inch Trimmer
Best for landscaped lawn borders - 5
Check itBLACK+DECKER 20V MAX LST522 Wheeled Edger Trimmer
Best for mixed trimming chores - 6
Check itBLACK+DECKER 20V MAX LSTE525 Trimmer and Edger
Best for split yard sessions - 7
Check itBLACK+DECKER 40V MAX LST136 Trimmer and Edger
Best for changing grass density - 8
Check itEGO Power+ ST1511T 15-Inch Trimmer
Best for shared household use
How we chose the best battery string trimmers
Job fit comes first: edging support for paved borders, a wider path for open stretches, and controls that suit the way you work. SundaySmarts compared the supplied specifications, battery kits and line-handling features.
The order favors practical weekly yard care, which puts the WORX first for smaller lawns. A lower-ranked model can still be the better choice when it solves a specific need, such as shaft adjustment or automatic line feed.
We separated line advancement from line replacement and avoided ranking cutting ability by voltage or motor speed alone. Neither number accounts for line size, head design and the growth you're cutting.
Compare the best battery string trimmers
Start with the cutting path and battery kit, then narrow the choices by edging support and line controls. The table makes those differences easier to compare before you read each recommendation.
| Product | Best for | Cutting width | Line diameter | Battery | Our score |
|---|---|---|---|---|---|
| WORX WG163 20V 2-in-1 Trimmer and Edger | small yard upkeep | 12 in | 0.065 in | Two 20V batteries included | 9.2 |
| BLACK+DECKER 20V MAX 2-in-1 Trimmer and Edger | straightforward weekly trimming | 12 in | One 2.0Ah battery included | 8.9 | |
| EGO Power+ ST1502SA 15-Inch Trimmer | long open borders | 15 in | 0.095 in | 2.5Ah battery and charger included | 8.7 |
| Greenworks 40V 12-Inch Trimmer | landscaped lawn borders | 12 in | 0.065 in dual line | 2.0Ah battery and charger included | 8.6 |
| BLACK+DECKER 20V MAX LST522 Wheeled Edger Trimmer | mixed trimming chores | 12 in | 2.5Ah battery and charger included | 8.5 | |
| BLACK+DECKER 20V MAX LSTE525 Trimmer and Edger | split yard sessions | 12 in | Two 20V MAX batteries included | 8.3 | |
| BLACK+DECKER 40V MAX LST136 Trimmer and Edger | changing grass density | 13 in | 40V MAX battery and charger included | 8.1 | |
| EGO Power+ ST1511T 15-Inch Trimmer | shared household use | 15 in | 0.095 in | 2.5Ah battery and charger included | 8.0 |
Which battery string trimmer fits your yard?
Choose by your main chore: maintaining compact lawn edges, clearing longer grass borders or switching often between trimming and edging. The notes below explain who each model suits and where another pick makes more sense.
WORX WG163 20V 2-in-1 Trimmer and Edger: Best for small yard upkeep
- Trimmer and wheeled edger
- Two 20V batteries included
- Button-controlled Command Feed
- Tilting head and spacer guard
A compact choice for weekly lawn borders and sidewalk edges. Support wheels guide edging, while the tilting head helps reach awkward patches.
Pros
- Support wheels for edging
- Two batteries included
- Adjustable spacer guard
Cons
- Narrower path than the EGO options
- Fine line suits routine grass trimming
WORX WG163: the best battery string trimmer for compact yards
The WG163 fits regular grass trimming and sidewalk touch-ups where control matters more than clearing a broad strip. Its 5.5 lb machine weight makes it worth considering if carrying a larger trimmer would discourage weekly upkeep.
Rubberized wheels support the tool in edging mode, while the head tilts 90 degrees to reach awkward areas. The adjustable spacer guard provides a guide around plants and garden features, though you still need to keep the cutting line clear of stems.
Command Feed gives you more line at a button press. That suits buyers who want to decide when line advances, and the second included battery gives you a spare for another part of the yard.
Skip it if your main task is cutting broad areas of tall grass. Its 12 in path and 0.065 in line are better matched to maintained borders than a neglected patch that needs clearing.
For sidewalk work, our guide to edging with a string trimmer explains how to follow an existing boundary.
BLACK+DECKER 20V MAX 2-in-1 Trimmer and Edger: Best for straightforward weekly trimming
- Automatic Feed Spool
- Trimmer-to-edger conversion
- Adjustable height and handle
- Battery and charger included
The LST300 suits maintained lawns where automatic line feed and simple controls matter most. Handle and height adjustments help you fit the tool to your stance.
Pros
- No bumping to advance line
- Converts to edging
- Adjustable working position
Cons
- One battery included
- No selectable speed control specified
BLACK+DECKER LST300: simple controls for weekly upkeep
The LST300 suits buyers who want automatic line advancement and a straightforward trim-to-edge tool. Its AFS system supplies line without a bump or a separate feed-button decision.
Adjustable height and handle positions help you find a stance that keeps your shoulders relaxed. Set those before starting, rather than bending at the waist to make the tool reach the grass.
The kit includes one 2.0Ah battery and a charger, and the battery belongs to BLACK+DECKER's 20V MAX Powerconnect system. That makes it a sensible starting point if you already use compatible tools from that family.
Choose it for a maintained lawn with predictable weekly work. Skip it if selectable speed control or an included spare battery is central to your plan; the LST522 and LSTE525 address those needs.
Automatic feed also doesn't remove the need to replace an empty spool. Our guide to loading string trimmer line explains that separate task.
EGO Power+ ST1502SA 15-Inch Trimmer: Best for long open borders
- 15 in cutting swath
- Rapid Reload head
- Variable-speed control
- 56V battery and charger included
A wider cutting path suits extended fence lines and open lawn borders. Rapid Reload helps with replacement line, and variable speed lets you ease back around delicate edges.
Pros
- Wider path for open areas
- Rapid Reload line replacement
- Accepts EGO 56V ARC Lithium batteries
Cons
- No wheeled edging conversion specified
- No telescopic shaft adjustment specified
EGO ST1502SA: a wider path for open borders
The ST1502SA is the stronger fit for long, open trimming routes where a broader sweep saves repeated passes. Its 15 in swath and 0.095 in line suit that role better than the compact options here.
Variable speed lets you reduce output for easier grass and increase it where growth is denser. Take smaller bites into tall patches rather than trying to bury the whole head in vegetation.
Rapid Reload helps with replacement line, making this a useful choice if spool refills are a chore you want to simplify. It doesn't provide the powered winding found on the ST1511T.
EGO claims up to 45 minutes of runtime from the included 2.5Ah battery and a 50-minute charge with the supplied charger. Plan extra margin for heavy cutting, frequent high-speed use or a battery that isn't fully charged.
Skip this model if wheeled edging or adjustable shaft length is your main requirement. Our EGO ST1502SA review takes a closer look at its fit for home yard care.
Greenworks 40V 12-Inch Trimmer: Best for landscaped lawn borders
- Variable-speed trigger
- Automatic line feed
- Dual-line cutting system
- Battery and charger included
A match for grass and light weeds around beds, sidewalks and lawn edges. Trigger-controlled speed lets you adjust output as you move between those areas.
Pros
- Speed adjusts at the trigger
- No bumping to feed line
- Complete battery kit
Cons
- Intended for grass and light weeds
- No wheeled edging conversion specified
Greenworks 40V: controlled trimming around landscaping
The Greenworks suits grass and light weeds around beds and lawn borders. Its variable-speed trigger lets you adjust output as you move from an open patch to a more delicate edge.
The dual-line head uses 0.065 in line, and automatic feed advances it during operation. This combination suits buyers who want speed control without managing a feed button.
Use the lower output that still cuts cleanly near landscaping, then increase it only when needed. Lower speed helps with control, but the line can still damage bark, stems and soft edging materials.
The kit includes a 2.0Ah battery and charger, so you have the core charging equipment from the start. Choose it for a routine route through established landscaping rather than a job dominated by woody growth.
Skip it if your main goal is guided sidewalk edging, since this model doesn't specify a wheeled conversion. Our Greenworks 40V trimmer review covers its controls and intended work in more detail.
BLACK+DECKER 20V MAX LST522 Wheeled Edger Trimmer: Best for mixed trimming chores
- Two speed settings
- Wheeled edger conversion
- Automatic Feed Spool
- Adjustable height and handle
Choose the LST522 when one session includes both easy lawn edges and denser grass patches. Two speed settings let you balance cutting power with battery use.
Pros
- Selectable power and runtime settings
- Wheels support edging
- Automatic line advancement
Cons
- One battery included
- Less gradual control than a variable-speed trigger
BLACK+DECKER LST522: one session with changing demands
The LST522 fits a route that mixes easy edging with denser grass patches. Its 2 speed settings let you choose a lower setting for lighter work and more output when growth calls for it.
Wheeled edger conversion helps when you move from fence-line trimming to a sidewalk boundary. Automatic line advancement keeps that change in task from also requiring a different feeding routine.
The included 2.5Ah battery gives this kit a different battery setup from the LST300. Don't turn that capacity difference into an exact runtime prediction, since cutting load and speed choice affect how long either tool runs.
Adjustable height and handle settings let you fit the working position before you start. Keep the head level with the grass instead of lifting it through your arms with every sweep.
Choose this model if automatic feed and selectable speed are your priorities. Skip it if you want a spare battery in the box or button-controlled line feed; the LSTE525 offers both.
BLACK+DECKER 20V MAX LSTE525 Trimmer and Edger: Best for split yard sessions
- Two batteries included
- Button-controlled EASYFEED
- Wheeled edger conversion
- Two speed settings
Two batteries suit buyers who trim separate yard areas or want a charged spare ready. EASYFEED gives you direct control over when more line advances.
Pros
- Spare battery included
- Button-controlled line feed
- Adjustable height and handle
Cons
- Narrow path for long open stretches
- Requires a button press to advance line
BLACK+DECKER LSTE525: a spare battery and direct feed control
The LSTE525 suits buyers who want a charged spare ready for another yard section. Its 2 included batteries let you swap packs instead of ending the session as soon as the first runs down.
That is useful for front-and-back-yard routines or a shared tool that gets used at different times. It doesn't promise continuous cutting all day, because charging speed still determines when an empty pack is ready again.
EASYFEED advances line at a button press, and 2 speed settings let you balance output with battery use. Choose it over the LST522 if direct feed control matters more than automatic advancement.
The tool weighs 5.3 lb and includes adjustable height and handle positions. Check the working balance with a battery fitted, since comfort depends on where the weight sits as well as the total.
Skip it if broad-area grass cutting is the main job. Our BLACK+DECKER 20V string trimmer review gives more context on the brand's compact trim-and-edge approach.
BLACK+DECKER 40V MAX LST136 Trimmer and Edger: Best for changing grass density
- PowerCommand adjustment dial
- Automatic Feed Spool
- Trimmer-to-edger conversion
- Battery charge indicator
The PowerCommand dial suits routes that alternate between easy grass and thicker patches. A battery charge indicator helps you judge when to wrap up or recharge.
Pros
- Adjustable power and runtime balance
- Battery charge indicator
- Adjustable height and soft-grip handle
Cons
- 7.8 lb weight
- Separate battery platform from BLACK+DECKER 20V MAX
BLACK+DECKER LST136: power adjustment for uneven growth
The LST136 fits trimming routes with changing grass density, especially when you want a dial for balancing power and runtime. Its PowerCommand control lets you change that balance as the work changes.
The 13 in path sits between the narrower BLACK+DECKER models and the wider EGO options. Automatic feed and trimmer-to-edger conversion make it suitable for maintaining borders as well as cutting grass the mower leaves behind.
A battery charge indicator helps you decide whether to finish another section or pause. BLACK+DECKER claims the included fast charger restores a full charge in 2 hours or less.
At 7.8 lb, it asks you to carry more than the compact BLACK+DECKER picks above. Choose it if its controls and cutting width fit your work, rather than assuming the 40V label makes it the right upgrade.
Skip it if you're buying mainly to share existing 20V MAX batteries. Those packs belong to a different battery platform.
EGO Power+ ST1511T 15-Inch Trimmer: Best for shared household use
- POWERLOAD line winding
- Telescopic aluminum shaft
- Variable speed with two settings
- 56V battery and charger included
An adjustable shaft helps different users set their reach, while POWERLOAD winds replacement line after threading. Choose it when those conveniences outweigh its added carrying weight.
Pros
- Shaft length adjusts
- Powered line winding
- Accepts EGO 56V ARC Lithium batteries
Cons
- 10.3 lb weight
- No wheeled edging conversion specified
EGO ST1511T: adjustable reach and easier line winding
The ST1511T suits households where users need different shaft lengths or where winding replacement line is a major nuisance. Its telescopic aluminum shaft and POWERLOAD system address those needs directly.
To reload, thread the line through the head and press the button to wind it. You still need the correct line and loading procedure, but powered winding removes part of the manual refill task.
The wider cutting setup matches the ST1502SA, while variable speed with 2 settings lets you adjust output. Both models accept EGO 56V ARC Lithium batteries, which matters if you're building around that tool family.
EGO claims the same up-to-45-minute runtime and 50-minute charging time with the supplied battery and charger. Choose between the two EGO models on handling and loading features, rather than expecting a longer session from this kit.
Skip the ST1511T if carrying weight is your main concern: it weighs 10.3 lb. Adjustable reach can improve fit, but it doesn't remove the effort of carrying the tool along your trimming route.
How should you choose a battery trimmer for your yard?
Match the tool to your borders, growth and working position before comparing battery voltage. A trimmer that feels manageable and suits your route is more useful than extra capacity you rarely need.
Measure the trimming route, not just the lawn
Walk the edges the mower can't reach and note where you'll turn, reach under obstacles or work beside hard surfaces. A small yard with many beds can involve more careful trimming than a larger, open lawn.
A narrow cutting path gives you less area to manage in tight spaces. A wider path helps on open stretches, but it still needs room for the guard and a steady sweep.
For broader power-source tradeoffs, read our electric vs gas weed eater comparison. If the growth includes woody stems or brush, use our guide to thick weeds and brush before choosing equipment.
Check battery compatibility and charging plans
Start with compatible batteries you already own, then decide whether this purchase should extend that system. Confirm the exact battery family, since a shared brand name or similar voltage doesn't establish compatibility.
Amp-hours help compare battery capacity within a compatible system, but they don't establish equal runtime across different voltages and tools. Our string trimmer battery voltage guide explains why the voltage number is only part of the choice.
A spare battery is most useful when both packs are charged before you begin. If you also plan to use a blower or another compatible tool, account for that work in your charging routine.
Decide how much edging support you need
Choose wheeled edging support when maintaining sidewalk and driveway boundaries is a regular chore. Wheels help guide the tool, while shaft and handle adjustments help you hold it in the right position.
For an established grass edge, string may handle the weekly touch-up. A deeply overgrown boundary or a new trench through soil calls for a different approach, as our string trimmer vs edger guide explains.
Separate line feed from line loading
Line feed replaces the small amount of line worn away during cutting. Automatic systems handle that advancement themselves, while button-controlled systems let you request it.
Line loading means refilling the head once its supply runs out. Choose easier loading if refills are your main concern, and choose your preferred feed system based on how you want to work during each session.
How do you set up a battery string trimmer correctly?
Fit the guard, adjust the handles and check the line before the first cut. Follow the manual for assembly and keep the battery removed while working around the cutting head.
Set the shaft and front handle so you can stand upright with relaxed shoulders. You should be able to guide the head near the ground without bending your back or holding your elbows high.
Check that the spool cap is secure and that the line follows the head's loading directions. Use the approved line diameter and length, since thicker or overlong line can overload the tool or disrupt feeding.
Clear stones, wire, toys and other loose objects from the route. Wear eye protection, long pants and sturdy footwear, and follow the manual's directions for hearing protection and keeping people and pets away.
Start on a clear, level patch with room to learn the controls. Our guide to using a string trimmer correctly covers stance, cutting direction and working around obstacles.
How can you get cleaner cuts and longer battery sessions?
Let the line tips cut, use only the speed needed and take shallow passes through dense growth. Forcing the head into a thick clump wastes energy and can leave an uneven result.
Keep the head roughly parallel to the lawn for ordinary trimming. Sweep steadily and overlap passes slightly instead of cutting down into the soil, which can scalp grass and throw debris.
For tall grass, shorten the growth in stages from the top down. Stop and remove the battery if stems wrap around the head; don't reach under the guard while the tool can start.
Avoid running the line against fences, brickwork and concrete for the whole pass. Contact wears line quickly, so approach the edge gradually and use a narrow cut.
Keep a safe gap around tree trunks even when the tool has a spacer guard. Repeated line strikes can damage bark, and cutting closer isn't worth that harm.
What care and common mistakes matter most?
Clean the head, maintain the correct line and store the battery as its manual directs. These habits prevent many avoidable feed problems and make the tool easier to prepare for the next session.
Clear buildup before it hardens
Remove the battery, then clear grass from the guard and around the head with a brush or suitable tool. Inspect the cap, spool and guard for damage before putting the trimmer away.
Keep ventilation openings clear and clean electrical parts only as the manual allows. Don't hose down the battery, charger or motor housing.
Don't solve feed problems with extra line
A jammed spool may need correct rewinding, debris removal or a replacement cap. Adding more line to an already crowded head can make feeding worse.
Follow the winding direction and avoid crossing loops inside the spool. When troubleshooting, return to the approved line size and loading procedure before changing anything else.
Don't force a hot tool to keep working
Heavy cutting can heat the battery and tool. If either stops or feels unusually hot, pause and follow the manual's cooling guidance instead of repeatedly trying to restart.
Store and charge batteries within the temperature limits in their instructions. Use the compatible charger, and check the recommended charge level before a long storage period.
Which best battery string trimmer should you buy?
Buy the WORX WG163 for compact lawn upkeep with regular edging, or the EGO ST1502SA for long open borders. Choose the ST1511T when adjustable reach and powered line winding are worth the extra carrying weight.
Pick the LST300 for simple automatic-feed trimming, Greenworks for trigger-controlled work around landscaping, or the LST522 for automatic feed with selectable speed. Choose the LSTE525 for a spare battery and feed button, or the LST136 for its power-adjustment dial.
Before ordering, settle 3 things: where you'll edge, which battery family you'll use and how you'll refill the head. For help turning those answers into a final choice, continue to the cordless string trimmer buying guide.
Our top 3 picks at a glance
-
1
Best for small yard upkeep
WORX WG163 20V 2-in-1 Trimmer and Edger
9.2/10 our score
See it on Amazon -
2
Best for straightforward weekly trimming
BLACK+DECKER 20V MAX 2-in-1 Trimmer and Edger
8.9/10 our score
See it on Amazon -
3
Frequently asked questions
What is the best battery string trimmer for most yards?
The WORX WG163 suits most small, maintained yards because it handles trimming and wheeled edging and includes a spare battery. For long, open borders, choose the EGO ST1502SA.
Base your choice on the length and type of edges you maintain, rather than lawn acreage alone.
Is a 20V or 40V string trimmer better?
Neither voltage is automatically better for your yard. Compare cutting width, approved line size, speed controls and battery compatibility before choosing.
A comfortable tool that fits your weekly work is more useful than a voltage label alone. Our string trimmer battery voltage guide explains the practical differences.
How wide should a battery string trimmer cut?
Choose a narrower path for tight borders and a wider path for open stretches. A 12 in tool suits work between beds, posts and lawn features, while a 15 in swath covers a broader strip per pass.
Allow space for the guard and your stance, especially beside fences.
Do battery string trimmers need bumping to feed line?
Several picks here advance line without bumping. Automatic systems feed line as needed, while button-controlled systems let you request more line yourself.
Replacing an empty spool is a separate job. Rapid Reload and POWERLOAD address that replacement task, so don't confuse easier loading with automatic line advancement during cutting.
Should I buy a trimmer and edger combo?
Choose a combo if you regularly tidy grass along sidewalks or driveways. Wheels can help guide the tool along an existing edge, but string edging doesn't replace a blade edger for every job.
Our guide to edging with a string trimmer explains positioning, control and safer technique.
