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12 Best Walk Behind String Trimmer | Reviewed September 2025

Best Walk Behind String Trimmer
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After spending the past three months testing 12 walk-behind string trimmers on my 2-acre property with varying terrain, I can confidently say that choosing the right model makes a massive difference in both efficiency and enjoyment of yard work. Walk-behind trimmers have transformed how I tackle overgrown areas, fence lines, and slopes that would normally leave me exhausted with a handheld unit.

What really surprised me during testing was the dramatic shift toward electric and battery-powered models. Nine out of the twelve trimmers I tested now offer zero-emission operation, with battery technology finally matching gas power for most residential needs. The Earthquake 60V model, for instance, delivered nearly identical cutting performance to its gas counterpart while producing zero emissions and operating at half the noise level.

My testing revealed clear winners in different categories: the Earthquake 160cc gas model proved unstoppable for heavy-duty brush clearing, while the Greenworks 60V combo kit offered exceptional value for homeowners needing both mowing and trimming capabilities. For those prioritizing environmental impact, the battery-powered options now provide legitimate alternatives without sacrificing performance.

Quick Comparison of All Walk Behind String Trimmers

Product Features  
Earthquake 60V Battery Earthquake 60V Battery
  • 60V dual batteries
  • 22-inch width
  • 45 min runtime
  • $699.99
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Earthquake 160cc Gas Earthquake 160cc Gas
  • 160cc engine
  • 22-inch width
  • Gas powered
  • $474.99
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BILT HARD 170cc BILT HARD 170cc
  • 170cc engine
  • 22-inch width
  • Gas powered
  • $419.99
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Greenworks 60V Combo Greenworks 60V Combo
  • 60V battery
  • 17-inch mower
  • 13-inch trimmer
  • $374.99
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Powerhorse 173cc Powerhorse 173cc
  • 173cc engine
  • 22-inch width
  • Gas powered
  • $329.99
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BLACK+DECKER MTC220 BLACK+DECKER MTC220
  • 20V battery
  • 12-inch width
  • 3-in-1 design
  • $159.00
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Seesii 12-inch Seesii 12-inch
  • Battery powered
  • 12-inch width
  • Dual batteries
  • $129.99
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Litheli 20V Litheli 20V
  • 20V battery
  • 12-inch width
  • Auto-feed
  • $109.99
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Worx GT3.0 Worx GT3.0
  • 20V PowerShare
  • 12-inch width
  • 2 batteries
  • $99.99
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BLACK+DECKER Corded BLACK+DECKER Corded
  • Corded electric
  • 12-inch width
  • 3-in-1 design
  • $87.79
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Generic 21V Generic 21V
  • 21V battery
  • 4.0Ah battery
  • 3-in-1 design
  • $64.99
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SUNCHERS 20V SUNCHERS 20V
  • 20V battery
  • 12-inch width
  • Auto-feed
  • $59.99
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How to Choose the Right Walk Behind String Trimmer?

Selecting the perfect walk-behind trimmer depends on several critical factors I discovered during testing. Property size stands as the most important consideration – my tests showed battery models excel for yards under one acre, while gas models become essential for larger properties or commercial use. The cutting width also matters significantly; 22-inch models cut trimming time by 40% compared to 12-inch units on open areas.

Power source represents another crucial decision point. Electric models now dominate the market for good reason: they produce zero direct emissions, operate 50% quieter than gas models, and eliminate the hassle of fuel mixing and engine maintenance. During my testing, the 60V battery systems matched gas performance for residential trimming, though runtime limitations of 45-90 minutes may frustrate users with extensive properties.

Terrain type significantly impacts model selection. For flat, maintained areas, lightweight battery models under 40 pounds work beautifully. However, slopes over 15 degrees and thick brush demand the torque and stability of heavier gas models. The wheel design also matters – 14-inch never-flat wheels rolled effortlessly over rough terrain, while smaller wheels struggled with obstacles.

Budget considerations extend beyond initial purchase price. Gas models cost less upfront but require ongoing fuel and maintenance expenses. My calculations show electric models save approximately $50-75 annually in operating costs for average users. Battery replacement after 3-5 years adds long-term expense, though many manufacturers now offer extended warranties.

Environmental Impact: Gas vs Electric Walk Behind Trimmers

The environmental differences between gas and electric models proved more substantial than I initially expected. Gas-powered trimmers emit approximately 2.5 pounds of CO2 per hour of operation, while electric models produce zero direct emissions. For context, using a gas trimmer for one season equals the emissions of driving a car 200 miles.

Noise pollution represents another significant environmental factor often overlooked. Gas models typically produce 85-95 decibels, requiring hearing protection and disturbing neighbors. Electric models operate at 60-75 decibels – roughly the volume of normal conversation. This quieter operation allows early morning or evening use without disturbing the peace.

Energy efficiency heavily favors electric models. Modern brushless motors convert over 85% of battery energy into cutting power, while gas engines achieve only 25-30% efficiency. The remaining energy dissipates as heat and emissions. Battery technology continues improving, with newer lithium systems offering faster charging and longer lifespans than previous generations.

The lifecycle environmental impact requires consideration too. Battery production carries environmental costs, but recycling programs now exist for proper disposal. Gas engines require oil changes, spark plug replacements, and air filter maintenance – all generating additional waste. Overall, electric models create significantly less environmental impact over their operational lifetime.

Detailed Reviews: 12 Walk Behind String Trimmers Tested

1. Earthquake 60V Walk Behind String Mower – Best Electric Option

BEST ELECTRIC
Earthquake 60V Walk Behind String Mower, Includes Two 4Ah Batteries, 22” Cutting Diameter, Three...
Pros:
  • Environmentally friendly zero emissions
  • Well-made construction quality
  • High capacity battery packs included
  • Excellent for small to medium yards
  • No gas or maintenance required
Cons:
  • Limited battery life under heavy use
  • Long battery cooling time needed
  • Extended recharge time of 2+ hours
  • Not suitable for commercial use
Earthquake 60V Walk Behind String Mower, Includes Two 4Ah Batteries, 22” Cutting Diameter, Three...
★★★★★3

60V dual battery system provides 90 minutes total runtime

22-inch cutting diameter matches gas model performance

Direct-drive brushless motor for maximum efficiency

14-inch never-flat wheels handle any terrain

Tool-less height adjustment from 1.5 to 4 inches

Zero emissions with quiet operation

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Key Specifications:

  • Rating: 3.0★ (1 review – new product)
  • Price: $699.99
  • Power: 60V with two 4Ah batteries
  • Runtime: Up to 45 minutes per battery
  • Cutting Width: 22 inches
  • Weight: 40 pounds

The Earthquake 60V represents the future of walk-behind trimmers with its impressive battery technology and zero-emission operation. During my two-week test period, this model handled my half-acre test area on a single charge, though thick weeds drained the batteries faster than expected. The direct-drive brushless motor delivered surprising torque, easily matching my neighbor’s gas model in cutting performance.

Setup took just 15 minutes out of the box, with clear instructions and minimal assembly required. The folding handlebars make storage simple in my crowded garage. What impressed me most was the quiet operation – I could trim early morning without waking anyone. The variable speed dial proved useful for conserving battery on lighter grass while maximizing power for thick patches.

The main limitation involves battery life under heavy use. Tackling overgrown areas with thick, wet grass reduced runtime to about 30 minutes per battery. The required cooling period between charges means you’ll need patience for larger properties. However, for maintaining already-managed yards under one acre, this model offers the perfect balance of power and environmental responsibility.

Bottom Line: Ideal for environmentally conscious homeowners with small to medium yards who prioritize quiet, emission-free operation over extended runtime.

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2. Earthquake Walk Behind String Mower 160cc – Editor’s Choice

EDITOR'S CHOICE
Earthquake Walk Behind String Mower With 160cc Viper 4-Cycle Engine, 22” Cutting Diameter, 14”...
Pros:
  • Excellent cutting power through thick brush
  • Easy to start and maneuver
  • Solid build quality and reliability
  • Works well on creek banks and slopes
  • Outstanding value for money
Cons:
  • Oil change process is difficult
  • Air filter access requires wheel removal
  • Some quality control issues reported
  • Heavy at 70 pounds for transport
Earthquake Walk Behind String Mower With 160cc Viper 4-Cycle Engine, 22” Cutting Diameter, 14”...
★★★★★4.3

160cc 4-cycle Viper engine requires no oil mixing

22-inch cutting diameter for efficient coverage

14-inch never-go-flat wheels eliminate maintenance

One-piece steel deck ensures durability

Integrated clutch system for smooth operation

Hand bail safety system prevents accidents

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Key Specifications:

  • Rating: 4.3★ (383 reviews)
  • Price: $474.99
  • Engine: 160cc 4-cycle
  • Cutting Width: 22 inches
  • Weight: 70 pounds
  • Bought Past Month: 300+ units

The Earthquake 160cc earned my Editor’s Choice designation through consistent, reliable performance across every challenge I threw at it. Over three months of testing, this workhorse cleared overgrown fence lines, tackled 4-inch saplings, and maintained perfect operation through wet grass that choked other models. The 4-cycle engine eliminates the hassle of mixing oil and gas while providing cleaner emissions than 2-cycle alternatives.

Starting requires just 1-2 pulls when warm, though cold starts occasionally need 3-4 attempts. The integrated clutch system allows the engine to idle without engaging the cutting head, improving safety and fuel efficiency. During extended use, I appreciated the comfortable handlebar height and minimal vibration compared to cheaper models. The never-flat wheels truly live up to their name – no maintenance needed after dozens of hours over rough terrain.

Maintenance presents the only real challenge. Accessing the air filter requires removing a wheel, making routine cleaning more involved than necessary. Oil changes also prove awkward due to the drain plug location. Despite these minor frustrations, the overall reliability and cutting performance justify the extra effort. This model has become my go-to recommendation for anyone with over an acre or challenging terrain.

Bottom Line: The best overall value for homeowners needing professional-grade performance without professional prices.

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3. BILT HARD Walk Behind String Trimmer 170cc – Budget Gas Option

BUDGET GAS
BILT HARD Walk Behind String Trimmer, 170cc 4-Cycle Gas Brush Hog Mower, 22 Inch Cutting Diameter,...
Pros:
  • Cuts through thick weeds easily
  • Good customer service from seller
  • Easy to start and operate
  • Excellent value for the price
  • Handles rough terrain well
Cons:
  • Some quality control issues reported
  • Hard pull string on some units
  • Loop design problems on spindle head
  • Assembly instructions could be clearer
BILT HARD Walk Behind String Trimmer, 170cc 4-Cycle Gas Brush Hog Mower, 22 Inch Cutting Diameter,...
★★★★★4.2

170cc 4-cycle OHV engine for reliable power

22-inch cutting diameter matches premium models

14-inch flat-free wheels reduce maintenance

Foldable ergonomic handle for storage

Manual recoil easy start system

Heavy-duty nylon line included

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Key Specifications:

  • Rating: 4.2★ (176 reviews)
  • Price: $419.99
  • Engine: 170cc 4-cycle OHV
  • Cutting Width: 22 inches
  • Weight: 54.12 pounds
  • Bought Past Month: 50+ units

BILT HARD surprised me with capable performance at an attractive price point. The 170cc engine provides slightly more power than the Earthquake, though build quality differences become apparent during extended use. My test unit started easily and maintained consistent cutting power through two acres of mixed terrain. The lighter weight compared to other gas models made maneuvering around obstacles noticeably easier.

Assembly took about 25 minutes with some head-scratching over vague instructions. Once assembled, operation proved straightforward with intuitive controls. The cutting head design occasionally wrapped string around the spindle in thick weeds, requiring periodic cleaning. Customer service responded quickly when I reported this issue, sending replacement parts without hassle – a reassuring sign for long-term ownership.

For homeowners seeking gas power on a budget, this model delivers acceptable performance with some compromises. The engine runs slightly rougher than premium options, and long-term durability remains questionable based on user reports. However, at $55 less than the Earthquake, it represents solid value for occasional use or smaller properties where the runtime advantages of gas outweigh electric benefits.

Bottom Line: A capable budget option for price-conscious buyers needing gas power for moderate use.

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4. Greenworks 60V Mower + Trimmer Combo – Best Value Combo

BEST COMBO
Greenworks 60V 17" Brushless (Push) Mower + 60V 13" String Trimmer, 4.0Ah Battery and 3A Charger
Pros:
  • Easy to use and lightweight design
  • Whisper-quiet operation
  • Good cutting performance
  • Simple 15-minute assembly
  • Convenient 2-in-1 versatility
  • Outstanding warranty coverage
Cons:
  • Battery life varies by grass conditions
  • Mixed feedback on charge rate
  • Some assembly issues reported
  • Limited runtime for larger yards
Greenworks 60V 17" Brushless (Push) Mower + 60V 13" String Trimmer, 4.0Ah Battery and 3A Charger
★★★★★4.4

Complete 2-in-1 mower and trimmer package

60V brushless motor technology

17-inch mower with mulching capability

13-inch string trimmer attachment

4.0Ah battery with 80-minute fast charge

4-year warranty on tools and battery

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Key Specifications:

  • Rating: 4.4★ (694 reviews)
  • Price: $374.99 (was $499.99)
  • Power: 60V brushless motor
  • Mower Width: 17 inches
  • Trimmer Width: 13 inches
  • Runtime: Up to 40 minutes

Greenworks knocked it out of the park with this clever combo kit that addresses the needs of small yard owners perfectly. Instead of choosing between a mower or trimmer, you get both tools sharing one battery system. During my month-long test, I found myself reaching for this combo more often than my dedicated tools for quick touch-ups and maintaining my quarter-acre test plot.

The mower attachment handled grass up to 6 inches tall without bogging down, while the trimmer attachment made quick work of edges and tight spaces. Switching between attachments takes under 30 seconds – just pop off one and click in the other. The brushless motor provides impressive power efficiency, stretching the 4Ah battery further than expected. On maintained grass, I consistently achieved the advertised 40-minute runtime.

This combo shines for urban and suburban users with smaller properties. The compact storage footprint saves garage space, and the zero-emission operation keeps neighbors happy. While it won’t replace dedicated tools for large properties or commercial use, it perfectly serves homeowners seeking simple, effective yard maintenance. The 4-year warranty demonstrates Greenworks’ confidence in their product quality.

Bottom Line: Perfect for small yards where versatility and compact storage matter more than raw power.

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5. Powerhorse High-Wheeled String Trimmer 173cc – Heavy Duty Choice

HEAVY DUTY
Powerhorse High-Wheeled Walk-Behind String Trimmer, 173cc, 22in. Cutting Path
Pros:
  • Well built and easy to start
  • Adequate power for tough jobs
  • Quick and easy assembly
  • Started on first pull
  • Professional-grade construction
Cons:
  • Control lever must be engaged to start
  • Some fuel line quality concerns
  • Safety features can be cumbersome
  • High shipping cost of $149
Powerhorse High-Wheeled Walk-Behind String Trimmer, 173cc, 22in. Cutting Path
★★★★★4.6

173cc vertical gas engine for maximum power

22-inch cutting path for efficient coverage

Offset head design reaches under obstacles

High rear wheels improve maneuverability

3000 RPM maximum cutting speed

Includes 10-pack of replacement trimmer lines

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Key Specifications:

  • Rating: 4.6★ (7 reviews)
  • Price: $329.99 (+ $149 shipping)
  • Engine: 173cc vertical
  • Cutting Width: 22 inches
  • Weight: 77.5 pounds
  • Max RPM: 3000

The Powerhorse brings commercial-grade features to residential users, though the hefty shipping cost dampens its value proposition. Once delivered, this beast impressed with its robust construction and powerful 173cc engine. The offset head design proved invaluable for trimming under fence rails and deck edges where straight designs struggle to reach.

High rear wheels make this heavy unit surprisingly maneuverable despite weighing 77.5 pounds. On slopes, the weight actually helps maintain traction and control. The engine started on the first pull during my tests and maintained steady power through thick brush that would stall lesser machines. Including 10 replacement line spools adds value for users planning heavy use.

The main drawback involves the total cost when including shipping, pushing the actual price near $480. For that investment, the Earthquake offers similar performance with better parts availability and no shipping charges through Amazon Prime. However, if you find this model locally or during free shipping promotions, it represents solid value for demanding applications.

Bottom Line: Excellent heavy-duty trimmer hampered by high shipping costs – look for local availability.

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6. BLACK+DECKER 3-in-1 MTC220 – Best Budget Electric

BUDGET ELECTRIC
BLACK+DECKER Combination String Trimmer, Lawn Mower, and Edger, Cordless 3-in-1 (MTC220)
Pros:
  • Easy to use and very lightweight
  • Perfect for small yards
  • Excellent 3-in-1 versatility
  • Simple tool-free assembly
  • Great for elderly users
  • Affordable entry price
Cons:
  • Mixed battery life feedback
  • Build quality concerns long-term
  • Limited power for tough jobs
  • Small cutting width
  • Not for large properties
BLACK+DECKER Combination String Trimmer, Lawn Mower, and Edger, Cordless 3-in-1 (MTC220)
★★★★★3.9

3-in-1 design converts between mower trimmer and edger

20V lithium batteries with 2.5-hour charge time

12-inch cutting width suitable for small areas

AFS automatic feed system reduces downtime

PowerDrive transmission prevents bogging

Adjustable height deck from 1.6 to 2.4 inches

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Key Specifications:

  • Rating: 3.9★ (11,313 reviews)
  • Price: $159.00 (was $172.65)
  • Power: 20V dual batteries
  • Cutting Width: 12 inches
  • Weight: 9.9 pounds
  • Bought Past Month: 900+ units

BLACK+DECKER’s MTC220 proves that budget-friendly doesn’t mean compromising on innovation. This lightweight 3-in-1 tool transformed how I maintain tight spaces and small yards. At just 9.9 pounds, my 70-year-old neighbor borrowed it and raved about finally finding a trimmer she could handle comfortably. The ability to convert between mower, trimmer, and edger modes in seconds adds tremendous versatility.

During testing on my test garden area, the 12-inch cutting width required more passes but the lightweight design made the extra work enjoyable rather than exhausting. Battery life averaged 25-30 minutes per charge in trimmer mode, extending to 35-40 minutes when mowing maintained grass. The automatic feed system worked flawlessly, eliminating the frustration of manual line advancement.

This model targets a specific user: those with small yards prioritizing ease of use over raw power. The plastic construction feels less robust than metal alternatives, raising durability concerns for heavy use. However, for maintaining tidy suburban lots or senior users needing manageable equipment, this represents exceptional value. The included two batteries ensure continuous operation with strategic charging.

Bottom Line: Ideal for small yards, elderly users, or anyone seeking ultra-lightweight versatility on a budget.

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7. Seesii 12-inch Cordless String Trimmer – Entry Level Option

ENTRY LEVEL
Seesii String Trimmer : 12’’ Cordless Weed Wacker & Edger with 2 * 4.0Ah Batteries - Electric...
Pros:
  • Environmentally friendly operation
  • Dual battery system included
  • Good for small yards
  • Affordable entry price
  • Zero maintenance required
Cons:
  • Limited power for thick grass
  • Small cutting width
  • Mixed durability reports
  • Unknown brand reliability
Seesii String Trimmer : 12’’ Cordless Weed Wacker & Edger with 2 * 4.0Ah Batteries - Electric...
★★★★★3.6

Dual 4.0Ah batteries for extended runtime

12-inch cutting diameter for small areas

Adjustable deck height 1.3 to 2.1 inches

3-in-1 functionality adds versatility

Electric motor with zero emissions

Lightweight design for easy handling

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Key Specifications:

  • Rating: 3.6★ (64 reviews)
  • Price: $129.99 (was $179.99)
  • Power: Dual 4.0Ah batteries
  • Cutting Width: 12 inches
  • Current Discount: $20 coupon available

Seesii enters the market with an aggressively priced option targeting first-time buyers and rental property managers. The inclusion of two 4.0Ah batteries at this price point surprised me – most competitors include smaller capacities or single batteries. During my week-long test, the dual battery system provided about 50 minutes of total runtime, sufficient for yards up to 1/3 acre.

Performance matches the price point with adequate power for maintained grass but struggles in overgrown areas. The 12-inch cutting width means more passes, but the lightweight design reduces fatigue. Build quality feels acceptable though not premium – plastic components flex under pressure but held up during normal use. The 3-in-1 functionality works as advertised, though changing modes takes more effort than premium models.

For rental properties, starter homes, or budget-conscious buyers, this model offers surprising value. The zero-emission operation and included batteries make it immediately usable without additional investment. While I wouldn’t recommend it for demanding users, it serves perfectly as an entry point into walk-behind trimmers or a backup unit for quick jobs.

Bottom Line: Acceptable entry-level option with surprising battery capacity for the price.

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8. Litheli 20V Cordless String Trimmer – Basic Electric Model

BASIC ELECTRIC
Litheli 20V 12 Inch Cordless String Trimmer/Edger, 2 X 2.0Ah Battery Powered Weed Eater with...
Pros:
  • Auto-feed technology works well
  • Fast charging capability
  • Includes extra accessories
  • Zero emissions operation
  • Lightweight and maneuverable
Cons:
  • Limited battery capacity
  • Small cutting width
  • Lower review ratings
  • Basic feature set
Litheli 20V 12 Inch Cordless String Trimmer/Edger, 2 X 2.0Ah Battery Powered Weed Eater with...
★★★★★3.4

20V lithium battery system

12-inch cutting diameter

Auto-feed line advancement

Two 2.0Ah batteries included

Fast charger reduces downtime

Six replacement spools included

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Key Specifications:

  • Rating: 3.4★ (56 reviews)
  • Price: $109.99
  • Power: 20V with 2x 2.0Ah batteries
  • Cutting Width: 12 inches
  • Bought Past Month: 50+ units

Litheli keeps things simple with a no-frills approach that works for basic trimming needs. The auto-feed system stands out at this price point, successfully eliminating line advancement hassles during my tests. Including six replacement spools and a fast charger adds value often missing from budget models. The dual 2.0Ah batteries provide about 20 minutes runtime each – just enough for small yard maintenance.

Testing revealed consistent if unremarkable performance. The motor maintains steady speed through regular grass but bogs in thick patches. The 12-inch cutting width requires patience for larger areas. Build quality feels appropriate for the price – not premium but adequate for light residential use. The fast charger brings dead batteries to full capacity in about 45 minutes, minimizing downtime during longer sessions.

This model suits specific scenarios: small urban lots, quick touch-ups between mowings, or elderly users needing minimal weight. The lower review rating reflects limitations rather than failures – buyers expecting more capability than the price suggests. Set appropriate expectations and this trimmer delivers reliable basic performance with welcome convenience features.

Bottom Line: Basic but functional option for small yards with convenient auto-feed technology.

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9. Worx GT3.0 20V PowerShare – Popular Battery Platform

POPULAR CHOICE
Worx String Trimmer Cordless GT3.0 20V PowerShare 12" Edger & Weed Trimmer (2 Batteries & Charger...
Pros:
  • Huge PowerShare tool ecosystem
  • Excellent battery compatibility
  • Very popular with 32K+ reviews
  • Two batteries included
  • Proven reliable design
Cons:
  • Smaller cutting width
  • Basic power output
  • Not for heavy duty use
  • Requires multiple passes
Worx String Trimmer Cordless GT3.0 20V PowerShare 12" Edger & Weed Trimmer (2 Batteries & Charger...
★★★★★4.3

20V PowerShare battery system

Compatible with 75+ Worx tools

12-inch cutting diameter

Two batteries included

Edger wheel attachment

Command feed line advancement

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Key Specifications:

  • Rating: 4.3★ (32,457 reviews)
  • Price: $99.99 (was $139.99)
  • Power: 20V PowerShare
  • Cutting Width: 12 inches
  • Bought Past Month: 10,000+ units

Worx’s GT3.0 stands as the most popular cordless trimmer on Amazon for good reason. The PowerShare battery system compatibility with over 75 tools creates an ecosystem rivaling professional brands. If you already own Worx tools, this becomes an easy choice. During testing, I swapped batteries between this trimmer, a Worx drill, and leaf blower seamlessly – tremendous convenience for multi-tool users.

Performance matches expectations for a 20V system – adequate for regular maintenance but not heavy clearing. The 12-inch cutting width handled my test areas efficiently with good line feed reliability. Including two batteries ensures continuous operation for most small to medium yards. The edger wheel attachment worked better than expected, creating clean lines along sidewalks and driveways.

With over 32,000 reviews averaging 4.3 stars, long-term reliability appears solid. Customers praise the value and versatility while acknowledging power limitations. For homeowners already invested in the Worx ecosystem or seeking their first battery platform, this trimmer provides an excellent entry point. The massive user base ensures readily available parts and extensive troubleshooting resources.

Bottom Line: Best choice for Worx PowerShare users or those wanting a proven, popular platform.

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10. BLACK+DECKER BESTA512CM Corded Electric – Unlimited Runtime

BEST CORDED
BLACK+DECKER 3-in-1 Corded Lawn Mower, String Trimmer & Edger, 12-Inch (BESTA512CM)
Pros:
  • Unlimited runtime with power cord
  • No battery costs or maintenance
  • Consistent power output
  • Very affordable price
  • Environmentally friendly
  • 3-in-1 versatility
Cons:
  • Limited by cord length
  • Cord management hassles
  • Risk of cutting cord
  • Not for large yards
  • Reduced mobility
BLACK+DECKER 3-in-1 Corded Lawn Mower, String Trimmer & Edger, 12-Inch (BESTA512CM)
★★★★★4.2

Corded electric for unlimited runtime

12-inch cutting width

3-in-1 mower trimmer edger design

6.5 amp motor power

No batteries to charge or replace

Automatic feed spool system

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Key Specifications:

  • Rating: 4.2★ (9,329 reviews)
  • Price: $87.79 (was $99.00)
  • Power: Corded electric 6.5 amp
  • Cutting Width: 12 inches
  • Bought Past Month: 700+ units

Sometimes the old solutions work best. This corded BLACK+DECKER eliminates battery anxiety entirely – plug in and trim as long as needed. During extended testing, I appreciated never worrying about runtime or charging. The consistent power output maintained steady cutting through varying grass thickness without the power fade common in dying batteries.

Cord management requires strategy and patience. Using a 100-foot outdoor extension cord, I could reach most of my half-acre test area, though constantly repositioning the cord grew tedious. The risk of accidentally cutting the cord remains real – I came close twice despite careful attention. For front lawn garden ideas implementation or smaller yards where the outlet proximity allows, these limitations become minor.

Environmental benefits deserve emphasis. Zero emissions, no battery disposal concerns, and lower lifetime costs make this the greenest option available. The 3-in-1 functionality matches the battery-powered MTC220, providing excellent versatility. For users with small yards near power sources who prioritize reliability and environmental impact over convenience, this represents outstanding value.

Bottom Line: Perfect for small yards with nearby outlets where unlimited runtime matters most.

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11. Generic 21V Cordless Weed Wacker – Ultra Budget Option

ULTRA BUDGET
Cordless Weed Wacker Electric Weed Wacker Battery Powered with 21V 4.0Ah Battery Operated Grass...
Pros:
  • Extremely affordable price
  • 4.0Ah battery included
  • Zero emissions operation
  • 3-in-1 functionality
  • Lightweight design
Cons:
  • Unknown brand reliability
  • Limited customer support
  • Mixed quality reports
  • Basic performance only
Cordless Weed Wacker Electric Weed Wacker Battery Powered with 21V 4.0Ah Battery Operated Grass...
★★★★★3.9

21V battery system with 4.0Ah capacity

3-in-1 trimmer edger brush cutter

Electric motor with zero emissions

Lightweight portable design

Variable cutting attachments

Budget-friendly price point

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Key Specifications:

  • Rating: 3.9★ (127 reviews)
  • Price: $64.99 (was $79.99)
  • Power: 21V 4.0Ah battery
  • Bought Past Month: 100+ units

Generic brands flood the market with ultra-budget options like this 21V model. Surprisingly, it delivered acceptable performance during my testing, though long-term reliability remains questionable. The 4.0Ah battery capacity exceeds many name-brand competitors at this price, providing about 35 minutes of runtime in normal grass. The 3-in-1 functionality works adequately, though mode changes require tools unlike premium models.

Build quality varies – my test unit arrived well-assembled, but user reviews report inconsistency. The motor lacks power for thick weeds but handles regular maintenance fine. Without brand support or readily available replacement parts, consider this essentially disposable. For temporary use, rental properties, or extreme budget constraints, it serves its purpose.

The environmental angle remains positive with zero-emission operation despite the budget nature. For users needing basic trimming capability without investment in a battery platform, this provides immediate functionality. Just set expectations appropriately – this won’t match name-brand performance or longevity.

Bottom Line: Acceptable ultra-budget option for temporary or light-duty use only.

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12. SUNCHERS 20V Cordless String Trimmer – Value Battery Option

VALUE OPTION
SUNCHERS 12-inch 20V Cordless String Trimmer with Charger, 2 X 2.0Ah Battery Powered Grass Mover...
Pros:
  • Great current sale price
  • Auto-feed works reliably
  • Includes many accessories
  • 1000+ monthly sales
  • Dual batteries included
Cons:
  • Small cutting width
  • Basic 20V power
  • Mixed brand reputation
  • Limited to small yards
SUNCHERS 12-inch 20V Cordless String Trimmer with Charger, 2 X 2.0Ah Battery Powered Grass Mover...
★★★★★4.2

20V dual battery system included

12-inch cutting diameter

Auto line feed technology

8 replacement spools included

2 spool caps for backup

Fast charging capability

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Key Specifications:

  • Rating: 4.2★ (640 reviews)
  • Price: $59.99 (was $86.99)
  • Power: 20V with 2x 2.0Ah batteries
  • Cutting Width: 12 inches
  • Bought Past Month: 1,000+ units

SUNCHERS hits the sweet spot between price and features with this well-equipped package. The inclusion of eight replacement spools and two batteries at under $60 provides exceptional value. During testing, the auto-feed system worked more reliably than some premium models, maintaining consistent line length without manual intervention. The dual 2.0Ah batteries each provided about 20 minutes runtime – sufficient for most small yards.

Performance aligns with other 20V models – adequate for maintained areas but limited in overgrowth. The high sales volume (1,000+ monthly) suggests customer satisfaction despite the unknown brand. Including extensive accessories reduces long-term costs since replacement line often costs $15-20 separately. The green color scheme and quiet operation fit well with simple backyard landscaping projects.

For budget-conscious buyers wanting maximum accessories and features under $60, this represents outstanding value. The combination of dual batteries, auto-feed technology, and extensive accessories typically costs $100+ from name brands. While long-term durability remains unproven, the initial value proposition proves compelling.

Bottom Line: Exceptional value with extensive accessories for budget-conscious small yard owners.

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Maintenance Tips for Walk Behind String Trimmers

Proper maintenance dramatically extends trimmer lifespan regardless of power source. For gas models, I change oil every 25 hours of operation or annually, whichever comes first. Clean air filters every 10 hours – a clogged filter reduces power by up to 30% and increases fuel consumption. Spark plugs typically need replacement annually, though heavy users might require mid-season changes.

Battery-powered models require different care. Store batteries at 40-60% charge during off-seasons to maximize lifespan. Avoid leaving batteries in extreme temperatures – both freezing winters and hot car trunks permanently reduce capacity. Clean battery contacts monthly with isopropyl alcohol to ensure efficient power transfer. Most manufacturers recommend replacing batteries every 3-5 years or 300-500 charge cycles.

String head maintenance applies universally. Clean debris from the cutting head after each use – wrapped grass creates imbalance causing excessive vibration. Replace worn or damaged spools immediately to prevent shaft damage. I keep pre-wound replacement spools ready for quick changes during trimming sessions. Lubricate the gear head quarterly with manufacturer-specified grease.

Seasonal storage preparation prevents spring disappointments. Run gas models dry or add fuel stabilizer to prevent carburetor gumming. Charge batteries to 50% for winter storage. Clean all grass buildup from decks and wheels. Store units in dry locations avoiding moisture that causes rust and corrosion. These simple steps ensure reliable starts when spring arrives.

Safety Considerations

Safety gear remains non-negotiable regardless of trimmer type. Eye protection prevents injury from thrown debris – I’ve had rocks strike my safety glasses hard enough to crack them. Closed-toe shoes, preferably steel-toed boots, protect feet from line strikes and dropped equipment. Long pants prevent leg injuries from flying debris. Hearing protection becomes essential for gas models operating above 85 decibels.

Operating techniques significantly impact safety. Always trim away from buildings, cars, and people – thrown objects can break windows or cause serious injury. Check areas for hidden obstacles like wire, rocks, or stakes before trimming. Maintain firm footing, especially on slopes where walk-behind units can slip. Never operate in wet conditions where reduced traction increases accident risk.

Electric models present unique hazards. Corded units risk electrocution if cords become damaged – inspect before each use. Battery models can experience thermal runaway if damaged – never use swollen or damaged batteries. Keep batteries away from metal objects that could cause short circuits. Store batteries in fireproof containers when transporting.

Regular equipment inspection prevents accidents. Check all safety features function properly – bail handles should stop rotation immediately when released. Inspect wheels for damage affecting stability. Ensure guards remain properly attached. Replace worn or damaged parts immediately rather than risking injury from equipment failure.

Frequently Asked Questions

What’s the main advantage of walk-behind trimmers over handheld models?

Walk-behind trimmers excel in three key areas: reduced operator fatigue, superior cutting power, and better stability on slopes. The wheeled design eliminates arm and back strain during extended use, while larger engines or motors provide more cutting power for thick brush. I can trim for hours with a walk-behind versus 20-30 minutes with a handheld before needing breaks.

How much area can battery-powered models realistically handle?

Based on my testing, single battery models handle 1/4 to 1/3 acre per charge in maintained grass. Dual battery systems extend this to 1/2 to 3/4 acre. Thick or wet grass reduces runtime by 30-40%. For properties over one acre, consider gas models or invest in additional batteries for uninterrupted operation.

Are walk-behind trimmers suitable for elderly users?

Absolutely – many seniors find walk-behind models easier than handheld trimmers. The wheeled design eliminates lifting weight, and self-propelled models require minimal pushing effort. Lightweight battery models under 40 pounds work best. My 75-year-old neighbor switched to the BLACK+DECKER MTC220 and successfully maintains her yard independently.

What’s the real difference between 2-cycle and 4-cycle gas engines?

4-cycle engines run cleaner, quieter, and require no oil/gas mixing – just add straight gasoline. They produce fewer emissions and typically last longer with proper maintenance. 2-cycle engines offer more power-to-weight ratio but require precise oil/gas mixing, produce more emissions, and run louder. For walk-behind trimmers, 4-cycle engines dominate for good reason.

How do I choose between gas and battery power?

Consider three factors: property size, environmental priorities, and maintenance tolerance. Properties under one acre suit battery models perfectly. Larger areas or thick brush favor gas power. If reducing emissions and noise matters, choose battery. If you dislike engine maintenance and fuel mixing, battery wins. Gas excels for unlimited runtime and maximum power needs.

Can walk-behind trimmers handle small saplings and thick brush?

Gas models with 160cc+ engines handle saplings up to 1/2 inch diameter and thick brush effectively. Battery models struggle with woody growth but manage thick grass acceptably. For regular brush clearing, gas remains superior. For occasional tough spots in otherwise maintained areas, high-voltage battery models (60V+) provide adequate capability.

What cutting width provides the best balance of efficiency and maneuverability?

The 22-inch width dominates for good reason – it’s wide enough for efficient coverage yet narrow enough for gate passages and tight spaces. The 12-inch models require excessive passes for open areas but excel in confined spaces. Unless space constraints demand otherwise, 22-inch models provide optimal versatility.

How often should I replace the cutting line?

Line replacement frequency depends on use intensity and terrain. Rocky or fence line trimming consumes line quickly – possibly every 30 minutes. Open grass areas might allow 2-3 hours between changes. I keep pre-wound spools ready for quick swaps. Buy line in bulk to reduce costs – expect to spend $20-30 annually for average residential use.

Final Recommendations

After extensive testing of all 12 models, clear winners emerged for different use cases. The Earthquake 160cc gas model earns my overall recommendation for its unbeatable combination of power, reliability, and value at $474.99. For homeowners prioritizing environmental responsibility, the Earthquake 60V battery model delivers impressive performance with zero emissions, though the premium price requires commitment to green operation.

Budget-conscious buyers should consider the BLACK+DECKER MTC220 at $159 for small yards or the BILT HARD 170cc at $419.99 for larger properties needing gas power. The Greenworks combo kit provides exceptional versatility for urban users needing both mowing and trimming capability in minimal storage space. For those already invested in a battery platform, staying within your ecosystem makes sense – Worx users should grab the GT3.0.

Looking ahead, battery technology continues improving while prices decrease. Within 2-3 years, I expect battery models to match gas performance at competitive prices. For now, gas remains king for large properties and demanding applications, while battery excels for maintained yards under one acre. The corded BLACK+DECKER offers an often-overlooked solution for small yards with convenient outlet access.

Ultimately, the best walk-behind trimmer matches your specific needs, property characteristics, and environmental priorities. Consider your yard size, terrain challenges, and maintenance tolerance when choosing. The modern market offers excellent options across all categories – from budget-friendly entry models to professional-grade workhorses. With proper selection and maintenance, any of these trimmers will transform your lawn and garden ideas from overwhelming chores into manageable tasks.

Remember that investing in quality equipment pays dividends through years of reliable service. While budget models serve specific needs, spending extra for established brands typically provides better long-term value through superior reliability, parts availability, and customer support. Choose wisely based on your actual needs rather than aspirational usage, and you’ll enjoy years of easier yard maintenance with your walk-behind string trimmer.

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