Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
A combination trimmer and edger saves you the hassle of switching tools when you move from cutting the lawn to tidying up the sidewalk. The best models swap modes in seconds and keep running long enough to finish your whole yard. This guide compares seven 2-in-1 units by their real specs and what buyers actually say, so you can pick one that fits your lawn size and your patience for fiddling with string.
I’m Mohammad Maruf — the founder and writer behind WellFizz. 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.
You want a tool that trims grass along fences and edges your driveway without dragging out two separate machines. This guide compares the top combination trimmer and edger models so you can pick one that fits your yard size and how often you want to recharge.
Quick Picks
- BLACK+DECKER 20V MAX String Trimmer and Edger (LST300) — Best Overall
- RAXONE 21V Electric Weed Wacker (4.0Ah) — Long Runtime
- MZK 20V 12” Cordless String Trimmer (ST12D07M) — Best Value
- JKLARI 21V Cordless Weed Wacker (JK-260MAX) — Folding Design
- ALSO GO 21V Cordless Weed Wacker — Lightest Pick
- BLACK+DECKER BESTA510 Weed Wacker — Corded Power
- Greenworks 40V Cordless 2-in-1 Trimmer Edger (STF314) — Premium 40V
How To Choose The Best Combination Trimmer And Edger
A 2-in-1 string trimmer sounds simple, but a few specs separate a tool that finishes the job from one that leaves you untangling line all afternoon. Focus on these four areas before you buy.
Cutting width and motor speed
A wider cutting swath clears more grass per pass, so you finish faster. Look for a 12-inch or 14-inch diameter. The motor speed (measured in RPM, or rotations per minute) tells you how easily it slices through thick weeds. Higher RPM numbers, like 9500 RPM, handle dense growth better than slower motors around 6200 RPM.
Battery voltage and capacity
Cordless models run on batteries measured in volts (V) and amp-hours (Ah). Higher voltage, such as 20V or 40V, generally means more power for cutting tough stalks. Higher amp-hours mean longer runtime between charges. If your yard is small, a standard 2.0Ah battery may be enough. For a larger property, look for 4.0Ah batteries or a model that includes two packs so you can swap them.
Weight and adjustability
You will hold this tool for the entire job, so weight matters. Most cordless trimmers weigh between 5 and 10 pounds. Look for a telescoping shaft or adjustable handle that lets you dial in the height for your body, which reduces arm and shoulder strain during longer sessions.
Line feed system
The machine feeds new cutting line either automatically or by bumping the head on the ground. Automatic feed is convenient, but some buyers report it wastes line by letting out too much. Bump-feed gives you more control but requires a tap of the head on the ground to advance. Pick whichever feels less annoying to you.
Quick Comparison
| Model | Best For | Cutting Width | Motor Speed | Weight | Amazon |
|---|---|---|---|---|---|
| BLACK+DECKER 20V MAX (LST300) | Reliable cordless with auto-feed | 12 Inches | 6200 RPM | 5.7 lbs | Amazon |
| RAXONE 21V 4.0Ah | Long runtime with two big batteries | 12 Inches | 9500 RPM | 6.17 lbs | Amazon |
| MZK 20V 12″ (ST12D07M) | Great value with many extra spools | 12 Inches | 8000 RPM | 6.3 lbs | Amazon |
| JKLARI 21V 2.0Ah | Compact storage and folding design | 12 Inches | 8500 RPM | 7 lbs | Amazon |
| ALSO GO 21V 2.0Ah | Lightweight and beginner-friendly | 12 Inches | 9500 RPM | 5.27 lbs | Amazon |
| BLACK+DECKER BESTA510 | Corded power for heavy trimming | 14 Inches | — | 6.3 lbs | Amazon |
| Greenworks 40V 13″ (STF314) | Premium power with 40V battery system | 13 Inches | — | 9.9 lbs | Amazon |
In‑Depth Reviews
1. BLACK+DECKER 20V MAX String Trimmer and Edger (LST300)
A light 5.7-pound cordless that auto-feeds line while you work.
This 2-in-1 trimmer and edger runs on a 20V MAX battery that the maker says provides 33% more runtime per pack than its previous LBXR20 pack. The POWERDRIVE Transmission delivers 6200 RPM to the string, and the 12-inch cutting swath covers most residential lawns without needing a second pass. Converting from trimmer to edger takes seconds, letting you clean up along sidewalks and driveways without switching tools.
Buyers repeatedly mention that a single charge covers the entire yard, and the automatic feed spool (AFS) releases line without bumping the head. A few owners mention the 6200 RPM feels less aggressive than a corded unit, and one reported a charger failure after a month. It is quiet, easy to start, and at 5.7 pounds versus the RAXONE 21V’s 6.17 pounds for lighter handling.
Why it earns the top spot
- 5.7 lbs is the lightest premium option in this list, reducing arm fatigue
- Auto-feed spool means you never stop to tap the head on the ground
- Single battery charge reportedly handles the whole yard for most users
Know before you buy
- 6200 RPM is slower than rivals like the RAXONE at 9500 RPM for thick weeds
- Includes only one 2.0Ah battery, so runtime is limited compared to dual-pack models
Solid daily driver: This pick suits you best if you want a proven cordless model from a major brand and your yard does not have extremely dense overgrowth.
One shortcoming: The slower motor speed means it struggles more than a 9500 RPM trimmer against thick, woody stalks.
2. RAXONE 21V Electric Weed Wacker (4.0Ah)
Two big 4.0Ah batteries give you over an hour of cutting power.
The 9500 RPM motor on this model (9500 RPM versus the BLACK+DECKER LST300’s 6200 RPM) makes it better at chewing through dense grass and stubborn weeds. It comes with two 4.0Ah batteries that the maker rates for 60 to 90 minutes of runtime, plus a fast charger. At 6.17 pounds it is still light enough for one-handed operation, and the 12-inch cutting width is standard for this class.
Customers note the battery lasts two full trims per charge, and the rotating head switches from trimming to edging in seconds. The dual-interlock switch requires pressing two buttons at once, which helps prevent accidental starting. It lacks the brand recognition of BLACK+DECKER, but the combination of a 9500 RPM motor and two large batteries makes it a strong runtime champion for mid-size yards.
Standout advantages
- Two 4.0Ah batteries provide 60-90 minutes of runtime — more than most single-battery models
- 9500 RPM motor cuts faster than many competitors in this price range
- Comes with 10 replacement spools, so you won’t need to buy more soon
Potential drawbacks
- RAXONE is a less established brand than BLACK+DECKER or Greenworks
- Some buyers may prefer a bump-feed system over automatic line feed
Ideal for larger lots: Grab this if you have a sizable yard and want to finish without waiting for a single battery to recharge.
Trade-off to note: You give up a recognizable brand name, but you get twice the battery capacity of most alternatives at this price point.
3. MZK 20V 12” Cordless String Trimmer (ST12D07M)
Eight spare spools and two 4.0Ah batteries for the price of a single-battery model.
The MZK runs at 8000 RPM with a 12-inch cutting width. Compared to the ALSO GO 21V, it weighs 6.3 lbs versus 5.27 lbs, but it also packs two 4.0Ah batteries instead of 2.0Ah. The upgraded motor delivers enough speed for typical household lawn care, and the automatic line feed releases string without manual adjustments.
Reviewers point out the battery charges in two hours and lasts long enough for small to medium yards. One reviewer noted that the plastic blades cut inch-thick grass stalks with ease. The key value play is the bundle: a built-in spool plus four additional replacement spools (eight total) keep you supplied for a full season. The MZK 4.0Ah battery is not compatible with other MZK tools, so you are locked into this platform if you want to share batteries.
Why it’s a steal
- Two 4.0Ah batteries included, which matches the RAXONE in capacity
- Eight replacement spools included, reducing future costs
- Lightweight at 6.3 lbs despite the larger batteries
Watch out for
- 8000 RPM is slower than the ALSO GO and RAXONE at 9500 RPM
- Battery is proprietary and not compatible with other MZK tools
Budget champion: Reach for this MZK if you want the best bang for your buck with enough batteries and string to last a season without extra spending.
Slower cut: The 8000 RPM motor means it won’t slice through heavy weeds as quickly as a 9500 RPM model.
4. JKLARI 21V Cordless Weed Wacker (JK-260MAX)
Folds in half for storage and spins at 8500 RPM for solid cutting power.
This JKLARI trimmer stands out because the shaft folds 180 degrees for compact storage in tight corners of your garage or shed. It packs an 8500 RPM motor and two 2.0Ah batteries that together deliver up to 40 minutes of runtime, according to the maker. The handle adjusts within a 180-degree range and the shaft can tilt up to 60 degrees, giving you flexibility for trimming under bushes and around obstacles.
Shoppers say the automatic string feeder sometimes jams, so you may need to adjust the line by hand. Another reviewer says the battery runs over an hour, enough for a front and back yard. At 7 pounds, it is the heaviest cordless model here, but the folding handle is a feature no other model in this price range offers. The maker backs it with a 1-year warranty.
Unique selling points
- 180-degree folding shaft saves significant storage space
- 8500 RPM motor splits the difference between budget and premium speeds
- Two 2.0Ah batteries included for hot-swapping
Considerations
- At 7 lbs, it feels heavier than the 5.27 lb ALSO GO trimmer
- Some buyers found the automatic line feed unreliable during use
Perfect for small storage spaces: Pick the JKLARI if you have limited garage or shed room and need a trimmer that tucks away neatly.
Line feed frustration: The auto-feed system may require manual intervention, which could annoy you during longer trimming sessions.
5. ALSO GO 21V Cordless Weed Wacker
Weighs just 5.27 lbs yet spins at 9500 RPM for serious cutting.
The ALSO GO manages to be the lightest cordless model here at 5.27 lbs while still delivering a 9500 RPM motor speed — 9500 RPM versus the MZK’s 8000 RPM. That combination makes it particularly good for seniors or anyone who gets arm fatigue easily. The 2-in-1 head rotates 90 degrees to switch from trimming to edging, and the handle adjusts 180 degrees for reaching tight spots.
Buyers consistently praise the lightweight feel. One buyer mentioned, “The battery lasted a long time, even at my slow pace.” It comes with two 2.0Ah batteries and a fast charger, plus 10 spare spools of trimmer line. The 12-inch cutting width is standard, but the 9500 RPM motor means it powers through dense grass despite its feathery build. It is also significantly lighter than the MZK 20V, which weighs 6.3 lbs.
Why it’s a smart choice
- 5.27 lbs is the lightest unit in this lineup, reducing fatigue on long jobs
- 9500 RPM motor matches the fastest models here for cutting power
- 10 spare spools included, so you won’t run out of line soon
Be aware
- 2.0Ah batteries have 2.0Ah capacity versus the RAXONE’s 4.0Ah packs
- Short persons under 5’4″ reported it fits well, but tall users over 6’4″ find it too short
A fantastic entry-level pick: Grab the ALSO GO if you want the lightest possible tool with fast spinning power, and your yard fits within two 2.0Ah battery charges.
Shorter runtime: The smaller batteries mean you may need to swap packs sooner than with a 4.0Ah model.
6. BLACK+DECKER BESTA510 Weed Wacker
A powerful corded 6.5-amp motor with the widest 14-inch cutting path here.
Unlike every other model on this list, the BESTA510 plugs into a wall outlet, which means you never wait for a battery to charge. The 6.5-amp motor and POWERDRIVE Transmission deliver consistent power for the toughest weeds, and the 14-inch cutting width is 14 inches versus the ALSO GO’s 12 inches, so you cover more ground per pass. The wheeled edge guide helps you run a straight line along sidewalks.
Buyers report it is lightweight at 6.3 pounds and cuts through overgrowth easily, but a common note is that the automatic line feed feeds too fast, wasting line. The cord retention system keeps the extension cord from pulling loose, though one owner reported the handle recess is too small for some plug shapes. It is built in the USA and backed by a 2-year limited warranty.
Where it excels
- 14-inch cutting path is wider than any cordless model here, speeding up the job
- 6.5-amp corded motor never loses power mid-job like a dying battery
- Made in the USA with a 2-year warranty
Limitations
- Must stay within reach of a power outlet and extension cord
- Auto-feed system tends to waste string, requiring more frequent spool changes
Step up for heavy trimming: Choose the BESTA510 if you have tough overgrowth and a yard with easy access to outdoor outlets, and you hate waiting for batteries to charge.
Cord hassle: You trade the freedom of cordless operation for unlimited runtime, and you may find yourself fighting with the auto-feed mechanism.
7. Greenworks 40V Cordless 2-in-1 Trimmer Edger (STF314)
A 40V platform that runs 78dB quieter than gas and shares batteries with 100+ tools.
The Greenworks runs on a 40V battery system that is 30% lighter than gas trimmers and operates at 78dB, which will not wake the neighbors or violate HOA noise rules. The telescoping shaft adjusts from 40 to 52 inches to fit users from 5’2″ to 6’4″. The pivoting head has 7 positions, letting you trim under decks, edge sidewalks, and detail flower beds without repositioning your body.
Buyer opinions are split. Some love it for its balance and power, with one reviewer noting it took just one 4.0Ah battery plus a little of the included 2.0Ah to trim a professional flower field. Others report that the included trimmer line breaks easily and the auto-feed jams. The maker offers a 3-year tool warranty and a 2-year battery warranty, the longest coverage of any model here. At 9.9 pounds it is the heaviest unit, but the anti-vibration tech and ergonomic handle help manage the weight.
Premium advantages
- 40V battery platform powers over 100 Greenworks tools, including mowers and chainsaws
- 78dB operation is 30% quieter than gas alternatives
- 3-year tool and 2-year battery warranty is the longest in this comparison
Heads-up
- At 9.9 lbs, it is 4.2 lbs heavier than the ALSO GO trimmer
- Some buyers found the stock trimmer line breaks easily and the auto-feed system unreliable
For the eco-system buyer: Pick the Greenworks if you already own 40V Greenworks tools or plan to build a battery-shared yard tool set, and you value quiet operation.
Weight and line issues: The heaviest model here may tire you out faster, and you may need to swap the stock trimmer line for a sturdier brand to avoid breakage.
Understanding the Specs
Cutting Width (Inches)
This is the diameter of the circle the trimmer line sweeps as it spins. A wider cutting width, like 14 inches, clears more grass with each pass than a narrower 12-inch model. If your yard has large open areas, a bigger cutting path saves you time. For tight spots around flower beds and fences, a 12-inch width gives you better control and reduces the risk of nicking your plants.
Motor Speed (RPM)
Revolutions per minute tell you how fast the trimmer head spins. A higher number, such as 9500 RPM, cuts through thick, tough weeds more effectively than a slower 6200 RPM motor. This matters most if you let the grass grow long between trims or if your yard has stubborn, woody stalks. For regular maintenance trimming, the difference is less noticeable.
Battery Voltage and Amp-Hours (Ah)
Voltage roughly indicates the power of the motor — higher voltage (like 40V) generally means more torque for cutting. Amp-hours tell you the battery’s energy capacity, or how long it can run before needing a charge. A 4.0Ah battery lasts roughly twice as long as a 2.0Ah battery under the same load. If your yard is large, look for higher Ah numbers or a model that includes two batteries so you can swap and keep working.
Auto Feed vs. Bump Feed
These describe how the trimmer releases more cutting line when the existing string wears down. Auto feed systems advance the line automatically as you work, which keeps you focused on trimming but can waste line by letting out too much at once. Bump feed requires you to tap the head on the ground to release more line, giving you more control over how much string you use but requiring an extra step. Both work well — choose based on whether you prefer convenience or control.
FAQ
How do I switch my 2-in-1 trimmer from trimming to edging mode?
Will a 12-inch cutting width be enough for my yard?
How long does a 20V trimmer battery last on a single charge?
Can I use any trimmer line with my combination trimmer and edger?
What is the difference between a corded and cordless trimmer for routine use?
How do I fix a trimmer line that keeps breaking?
Will a 9500 RPM trimmer damage my plants or flowers?
What does the auto-feed spool “AFS” mean, and do all trimmers have it?
Can a senior or someone with arthritis comfortably use these trimmers?
Is it worth paying more for a 40V trimmer over a 20V model?
Final Thoughts: The Verdict
Across the board, the combination trimmer and edger winner is the BLACK+DECKER 20V MAX LST300 because it combines a trusted brand, lightweight design, and automatic line feed in a cordless package that handles the typical residential yard. If you want the longest runtime between charges and the fastest motor, grab the RAXONE 21V 4.0Ah. And for the best value with plenty of spare line and dual batteries, the MZK 20V 12″ Cordless Trimmer gives you more accessories per dollar than the BLACK+DECKER.
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, WellFizz earns from qualifying purchases. This does not affect which products we feature.
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Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.