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You want one tool that trims grass along your sidewalk and edges your flower beds without needing a second machine or a tangle of extension cords. The right weed eater and edger should cut cleanly along concrete, reach under a fence, and still have enough battery to finish your whole lawn without leaving a half-trimmed mess. The difference between a great tool and a frustrating one depends on battery life, how fast it converts between modes, and whether the line feeds automatically—not how many attachments the box promises.
I’m Rikta — the founder and writer behind Lawn Gear Lab. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Whether you have a small patch of grass or a sprawling yard, the best weed eater and edger for you is the one that gives you enough runtime, lets you switch modes easily, and keeps its head locked at the angle you set.
Our Picks at a Glance
How To Choose The Best Weed Eater And Edger
The biggest mistake buyers make is picking a weed eater and edger solely on voltage. A 20V tool with a small 1.5Ah battery will run out of steam before your sidewalk does. You need to match the battery capacity to your yard size, and you need a conversion system that feels natural—not one that requires a toolkit every time you switch modes.
Battery Capacity Sets Your Runtime
Look at the amp-hours (Ah) rating, not just the voltage. A 2.0Ah battery typically gives you 20 to 30 minutes of continuous trimming. A 5.0Ah battery can push past an hour. If your yard is a quarter acre or larger, a single small battery will leave you waiting for a recharge mid-job. Two batteries included in the box is the safety net that keeps you working.
Conversion Speed Matters More Than You Think
The best designs let you switch from trimming to edging by rotating the head or stepping on a pedal—no tools, no detached parts. A trimmer that takes more than a few seconds to convert is one you will eventually use as a trimmer only, defeating the whole point of a 2-in-1 tool.
Auto Line Feed Saves Your Knees
Bumping the head on the ground to advance the line works, but auto-feed systems that advance the string automatically every time you restart are far more convenient. The trade-off is that some auto-feed mechanisms jam if you use a thinner line than recommended, so always check the line diameter spec before buying replacement spools.
Quick Comparison
| Model | Best For | Voltage / Ah | Cutting Width | Weight | Amazon |
|---|---|---|---|---|---|
| WORX WG163★ Best Overall | Premium mid-yard versatility | 20V / 2x 20V | 12 in. | 5.5 lbs | Amazon |
| BeautFirst 12″Battery Champion | Maximum battery runtime | 20V / 2x 5.0Ah | 12 in. | — | Amazon |
| FOKIKIP 12″ | Budget-friendly 2-speed control | 21V / 2x 2.0Ah | 12 in. | — | Amazon |
| BLACK+DECKER LST300 | Entry-level simplicity | 20V / 1x 2.0Ah | 12 in. | 5.7 lbs | Amazon |
| JYGMPRO 21V | Brush cutting power | 21V / 2x 2.0Ah | — | — | Amazon |
| BLACK+DECKER LST522 | Wheeled edging precision | 20V / 1x 2.5Ah | 12 in. | 5.7 lbs | Amazon |
| WORX WG170 | 3-in-1 mini mower function | 20V / 2x 20V | 12 in. | 5.5 lbs | Amazon |
In‑Depth Reviews
1. WORX WG163
Our pick — over 4★ from 27,500+ verified ratings; the strongest balance of quality and price.
Two batteries and a push-button line feed for uninterrupted trimming.
The WORX WG163 converts from string trimmer to edger in seconds by tilting the head 90 degrees, so you can work along sidewalks and flower beds without switching tools. It spins at 7600 rpm (revolutions per minute) and uses a push-button Command Feed spool, meaning you never have to bump the head on the ground to get more line. Buyers report the two included 20V Power Share batteries handle a well-maintained quarter-acre lot with no problems, though one owner noted the batteries are “very small, light batteries with short runtime (~10 min) but sufficient for 1500 sq ft house.”
The rubberized support wheels guide the edger for straighter lines, and the spacer guard adjusts to keep you from damaging nearby plants. At 5.5 lbs, it is light enough to carry in one hand, and the Power Share system means any future WORX 20V or 40V tool shares the same battery platform. The adjustable flower guard is a thoughtful touch for precision work around ornamentals.
One trade-off is that the charger is slow and the battery can be extremely difficult to remove from the charging bay. Some reviewers needed a clamp to pull it free. The height adjustment mechanism also requires significant force to move. Still, for the combination of runtime, ease of conversion, and brand reliability, this is the most well-rounded pick in the lineup.
What stands out
- Two batteries included handle up to 1/4 acre, owners mention
- Push-button Command Feed means no bumping the head
- Head tilts 90° for edging on slopes and tight spots
The few drawbacks
- Battery can be extremely hard to remove from the charger
- Height adjustment needs a lot of force to change
- Guard too large for precise edging along narrow paths
Best for medium yards: If you have a well-maintained lawn up to a quarter acre and want to share batteries across multiple WORX tools, this is the one.
The caveat: The charger is slow, and if you have a large property with thick growth, the batteries will drain faster than the 45-minute mark you get from a 5.0Ah setup.
2. BeautFirst 12″ Cordless String Trimmer & Edger
A full hour of trimming from two 5.0Ah batteries that still show 80% power left.
The BeautFirst 12″ runs circles around other budget trimmers in battery life. It comes with two 5.0Ah lithium batteries that deliver more than 60 minutes of continuous runtime. The WORX WG163 above offers about 30 minutes per battery, so this is a 2.5x capacity advantage. Customers note the battery lasted an hour or so and still showed 80 percent power left, which means you could easily finish a medium-sized yard on a single charge.
The trimmer head rotates 0° to 90°, and the handle can pivot 180°, so you can find a comfortable angle for edging along curbs or trimming under low-hanging shrubs. The auto-feed system advances the line automatically, though one reviewer noted the string doesn’t load automatically very well, and it is easy to simply open the cap and do it manually.
At this price point, the biggest surprise is the detachable pole design that lets you adjust the length for different user heights. The safety lock button and trigger system prevent accidental starts. The only real limitation is the brand—BeautFirst is less established than WORX or Black+Decker, so long-term parts and warranty support are unknowns.
Runtime leader: With 60 minutes of use and 8 included spools, this is the best value for anyone who prioritizes battery endurance over brand familiarity.
Reach for this if: You have a medium to large yard and want to trim without constantly swapping batteries.
skip it if: You prefer a well-known brand with readily available replacement parts from big-box stores.
3. WORX WG170
Three tools in one body: trimmer, edger, and a mini mower for tight spots.
The WORX WG170 takes the 2-in-1 concept one step further by adding a mini mower mode. The head rotates 90° for edging, and when you lock the wheels into the right position, the trimmer becomes a small wheeled mower that can reach under benches and between garden beds. It runs at 7600 rpm, the same motor as the WG163, but with a longer shaft for better reach.
It includes 7 handle adjustments and 6 rotating head settings, giving you far more flexibility than most competitors. The Command Feed button lets you advance the line without stopping. Reviewers point out the battery lasts 18 to 22 minutes under heavy use, with one reviewer noting the batteries are “meh” and take 5.5 to 6 hours to charge. Another owner, a 75-year-old woman, said after 10 minutes of heavy use, battery power remained at 75%, and she found it easy to handle.
The trade-off is that the mini mower function, while clever, is not powerful enough to replace a real lawn mower. It works best for spot-trimming low grass in tight zones. The batteries also feel undersized for the claimed runtime—three spools are included, which is generous, but you will likely need a third battery for larger properties.
The creative edge
- Three functions in one body reduces storage space needed
- 7 handle and 6 head adjustments fit any body angle
- Command Feed button works without bumping
The power gap
- Batteries take 5-6 hours to charge for only 20-30 min use
- Mini mower mode is for light touch-ups only
- Heavier than the WG163 at similar weight but more attachments
Best for the gadget-minded: If you love multi-tools and have lots of tight spots in your yard, the mini mower function is genuinely useful.
Not for long runs: The slow charge speed and moderate battery life mean you need to plan your trimming around charging breaks.
4. BLACK+DECKER LST522
A wheeled edger stand and dual-speed motor for clean lines and longer runtime.
The LST522 is the premium step-up from the LST300. It includes a wheeled edging guide that keeps the trimmer head stable as you walk along the curb, producing straighter lines than freehand edging. The PowerDrive transmission boosts torque at the string, and the two-speed control lets you switch between high power for thick weeds and lower speed for extended battery life.
The included LBXR2520 battery offers 66% more runtime than standard 1.5Ah packs, according to the brand, which buyers confirm handles a full yard without dying mid-job. The AFS auto-feed system works reliably, and the micro-texture handle grip reduces vibration during extended use. One reviewer at 5’3″ said this was the first trimmer that was short enough to use comfortably.
Some owners found the two-speed control unintuitive and the user manual lacking detail on how the auto-feed mechanism works. The trimmer is not designed for coarse brush, so do not expect it to chew through woody vines or heavy brambles. It is best for routine maintenance on established lawns.
Edging specialist: The wheeled guide and dual speeds make this the best choice for keeping sidewalk edges crisp without stooping.
Reach for this if: You want a dedicated edging wheel and the option to choose power level for different tasks.
Look elsewhere if: You have overgrown brush or need more than the single included 2.5Ah battery.
5. FOKIKIP 12″
A low-cost trimmer with two speeds and a pedal conversion that actually works.
The FOKIKIP 12″ delivers two-speed control and an automatic line feed system at a price well below the WORX models. It comes with two 2.0Ah batteries that provide up to 45 minutes of combined runtime, and a fast charger reduces downtime between sessions. A clever pedal at the trimmer head lets you rotate the machine 90° to switch from trimming to edging without bending down or using tools.
Low-speed mode is suitable for daily trimming and fine work, while high-speed mode handles dense or thick weeds. The 180° adjustable handle and 54° rotatable cutting head make it easier to reach corners and fences. The package includes 6 bonus replacement spools, which the brand says extends service life by approximately 3 times. Shoppers say the batteries last a long time, and having two batteries included is a big plus.
The auto-feed requires a first-use step: you must untie a knot in the pre-installed trimmer line before it will feed properly. Some users miss this step and return the unit thinking it is broken. The plastic build feels less sturdy than the WORX or Black+Decker options, but for occasional use on a small to medium yard, the value is tough to top.
Where it wins
- Two-speed control for different grass conditions
- Pedal-operated conversion is fast and tool-free
- Fast charger plus 6 spools included
Where it cuts corners
- Plastic build feels less durable than premium picks
- Auto-feed knots on first use if you skip the manual
- 45 min total runtime lags behind 5.0Ah options
Ideal for the budget buyer: If you need a functional 2-in-1 for a small lawn and want to spend less, this is the one.
The catch: The 45 minutes of total runtime means you need to plan your work carefully—you cannot afford to waste battery on overgrown spots.
6. JYGMPRO 21V
A 400W copper motor at 11,000 rpm that cuts through brush, not just grass.
The JYGMPRO 21V is designed for heavier work. Its 400W pure copper motor spins at 11,000 rpm—significantly faster than the typical 6,200 to 7,600 rpm of most cordless trimmers—and the package includes two types of heavy-duty blades. Diamond-shaped blades handle high grass and weeds, while circular saw blades cut through woody shrubs and brambles. The cutting head rotates 90° for edging mode, and the telescopic shaft extends from 33.5″ to 47.2″ to suit different heights.
Buyers are split. One reviewer called it cheap quality that feels like a toy, while others said the battery lasts a long time and mows the lawn and weeds easily. The dual-action safety lock prevents accidental starts, and the anti-splash deflector keeps debris from flying back at you. The 2.0Ah batteries deliver up to 30 minutes per charge, and the fast charger tops them up in about 3 hours.
This is the only trimmer in the lineup that comes with metal blades instead of just string, making it a genuine brush cutter in addition to a weed eater. However, the build quality complaints suggest it is best for occasional heavy use rather than weekly trimming. The brand is also less established, so warranty support may be limited.
Brush cutter alternative: The blade attachments and high motor speed make this the only pick capable of tackling woody growth and brambles.
Best for overgrown lots: If your yard has patches of woody shrubs or thick brush, the blade system justifies the short battery life.
Not for routine trimming: The inconsistent build quality and single-speed motor make it less suitable for weekly grass maintenance.
7. BLACK+DECKER LST300
The lightest, simplest 2-in-1 for small yards where weight matters most.
The LST300 is the entry-level standard for cordless trimming. It runs at 6,200 rpm, which is slower than the WORX and FOKIKIP alternatives, but the PowerDrive transmission helps deliver usable torque to the string. The 2-in-1 conversion is as simple as it gets—press a button and rotate the head—and the AFS automatic feed spool advances the line without bumping.
It comes with a single 2.0Ah battery, and a wall-mountable charging base is included. Buyers report the battery stays charged for quite some time and covers a full yard on one charge, though one buyer mentioned only 15 minutes of runtime per battery with several hours needed to recharge. At 5.7 lbs it is very light, and the adjustable handle with height positions gives good control. The 12-inch cutting swath is standard for the category.
The main limitation is the single battery. Some owners reported the charger stopped working after a single use, so check the return policy. For a small, flat lawn, it is perfectly adequate and very easy to handle.
Strengths
- Very lightweight at 5.7 lbs—easy for anyone to handle
- Auto-feed spool works without bumping the head
- 2-in-1 conversion is fast and intuitive
Weaknesses
- Single battery gives limited runtime for larger yards
- Some users report charger failure after first use
- Slower motor than competitors at 6,200 rpm
Best for tiny lots: If you have a 1500 sq ft lawn and want the lightest tool that still edges, this is the best low-cost choice.
pass on it if: Your yard is larger than 1/4 acre, or you need a second battery included to avoid waiting for a recharge.
Understanding the Specs
Battery Amp-Hours (Ah)
This is the most important number for runtime. A 2.0Ah battery typically gives 20 to 30 minutes of steady trimming. A 5.0Ah battery can run for over an hour. Two batteries double that, so a pair of 5.0Ah packs can last as long as you need. Always check the Ah rating—not just voltage—to gauge how long the tool will actually work.
Automatic Line Feed vs. Bump Feed
Auto-feed systems advance the string every time you start the motor, so you never need to tap the head on the ground. Bump-feed requires you to hit the head on a hard surface to release more line. Auto-feed is more convenient, but it can jam if you use the wrong line diameter. Check whether the spool accepts 0.065″ line—the most common size for light to medium trimming.
Cutting Width
Almost all cordless trimmers use a 12-inch cutting swath. A wider swath means fewer passes to cover a given area, but it also requires slightly more battery power per pass. For most residential yards, 12 inches is the standard that balances coverage and battery life well.
Head Rotation for Edging
The best 2-in-1 designs let you rotate the cutting head 90° so the string cuts vertically instead of horizontally. Some use a button and twist; others use a foot pedal. The faster the rotation, the more likely you are to actually use the edging feature. Avoid designs that require partial disassembly or tools to switch modes.
FAQ
Will a weed eater and edger work on thick weeds and brush?
How long does the battery last on a typical charge?
Can I use a thicker trimmer line than 0.065 inches?
How do I know if a trimmer is easy to convert from trimmer to edger?
Is a weed eater and edger heavy to use for a senior or smaller person?
What does automatic line feed mean and does it work?
Can I use the same battery for multiple yard tools?
How long does the trimmer line last before I need to replace it?
What is the difference between a string trimmer and an edger?
Is a cordless weed eater as powerful as a gas one?
Final Thoughts: The Verdict
For most people, the weed eater and edger winner is the WORX WG163 because it combines reliable conversion, push-button line feed, two included batteries, and a proven battery platform you can expand. If you want maximum battery runtime without swapping, grab the BeautFirst 12″ and its two 5.0Ah packs. And for overgrown lots that need a real brush cutter, the JYGMPRO 21V with its interchangeable metal blades handles thick brush that would stall a standard string trimmer.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Lawn Gear Lab earns from qualifying purchases. This does not affect which products we feature.