Stop Overpaying for String Trimmers — These 5 Are All You Need
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There’s nothing worse than spending your weekend fighting with a weak, unreliable trimmer that leaves patches of uncut grass along your fence line. A bad string trimmer turns a simple 20-minute cleanup into an exhausting battle that leaves your lawn looking worse than when you started. I’ve found the solution: the five trimmers below deliver the cutting power, runtime, and reliability that actually get the job done right.
Best Overall: The Power Plant That Handles Everything
The EGO Power+ ST1521S is the trimmer that changed my approach to yard maintenance. This 56V brushless trimmer delivers professional-grade cutting power in a package light enough to use for extended periods. Why it wins: The POWERLOAD technology eliminates the frustrating bump-feed dance—it auto-loads line at the touch of a button, and the carbon fiber split shaft carries a lifetime warranty against breakage.
- POWERLOAD Head, load your line, push a button and go
- 15” cutting swath
- Dual-feed spiral twist 0.095in. Line
Pros
- 56V brushless motor delivers 8,000 RPM cutting speed for thick weeds and grass
- POWERLOAD auto-advance saves 5+ minutes per mowing session vs. manual bump feed
- Runs 30 minutes on a single 2.5Ah battery—enough for most residential yards up to 1 acre
- Carbon fiber split shaft includes lifetime warranty, outlasts standard aluminum shafts by 3-5 years
- Uses .095″ line (thicker than most competitors), cuts cleaner and requires less touching up
Cons
- Battery not included in base kit (requires separate purchase)
- Heavier than budget models at 7.5 lbs
- 56V batteries are system-specific and won’t work with other brands
Trade-offs / Who should skip: If you’re looking for the absolute cheapest entry point or already own a different battery platform, this isn’t it. But if you mow regularly and value reliability, the investment pays for itself in durability.
Scores: Performance 5/5 | Cutting Power 5/5 | Ease of Use 5/5 | Value 4/5
Micro-close: If you only buy one thing from this list, make it this one.
Best for Storage: The Space-Saver That Doesn’t Sacrifice Power
The DEWALT 20V MAX XR DCST922B is the trimmer I recommend to anyone with limited garage or shed space. The folding hinge reduces the overall length by 40%, making it easy to tuck into a corner without taking up room. Why it wins: Despite the compact storage footprint, the 14-inch cutting swath handles standard residential properties just as well as full-size competitors.
- Folding hinge to fit into small storage spaces**
- Reduced length when folded for easy transportation**
- 14 in. swath for a wide cutting area
Pros
- Folding hinge reduces stored length by 40%, fitting in compact spaces
- QuickLoad spool system loads .080″ line in under 60 seconds—no threading required
- Variable speed trigger lets you use 30% less battery on lighter trimming tasks
- Brushless motor runs cooler and lasts 2-3x longer than brushed alternatives
- Hi/Lo speed control optimizes power for different vegetation types
Cons
- 20V platform less powerful than 40V+ competitors
- Folding hinge adds complexity and potential wear points
- 14-inch swath slightly narrower than premium models
Trade-offs / Who should skip: This isn’t the best choice if you have thick, overgrown weeds or large properties over 1.5 acres. For standard suburban yards, it’s perfect.
Scores: Performance 4/5 | Cutting Power 4/5 | Ease of Use 5/5 | Value 4/5
Micro-close: Best choice if you have limited storage space and need a tool that folds flat.
Best for Multi-Tool Users: The System Player
The Milwaukee M18 Brushless 2828-21 is designed for anyone who’s already invested in the M18 battery ecosystem. This trimmer is part of a platform with over 200 compatible tools, so batteries and chargers work across your entire collection. Why it wins: Up to 6,200 RPM delivers the cutting speed of trimmers in a higher voltage class, all on an 18V platform.
Pros
- 6,200 RPM cutting speed matches 24-28V competition in power output
- Easy Load trimmer head loads 25 feet of line in under 30 seconds
- 14-16 inch adjustable cutting swath lets you customize for different areas
- Included 6.0Ah battery provides 35-40 minutes of runtime on one charge
- Batteries and charger compatible with 200+ other Milwaukee M18 tools
Cons
- Only worthwhile if you already own M18 batteries and tools
- 18V platform less versatile on heavy commercial-grade overgrowth
- Requires M18-specific batteries, limiting third-party options
Trade-offs / Who should skip: If you don’t own other M18 tools or prefer a simpler single-tool setup, look elsewhere. Existing Milwaukee users will see immediate value.
Scores: Performance 4/5 | Cutting Power 4/5 | Ease of Use 5/5 | Value 4/5
Micro-close: Best choice if you already use Milwaukee M18 batteries across other yard tools.
Best High-Power Option: The 80V Workhorse
The Greenworks 80V 16″ ST80L210 is built for serious cutting. The 80V platform delivers the highest voltage in this lineup, translating to faster blade speed and longer runtime. Why it wins: The 16-inch cutting path is the widest of these five models, meaning you cover your yard in fewer passes.
- POWERFUL 80V PERFORMANCE – Delivers strong cutting power to power through tough grass and weeds, making it ideal for demanding yard maintenance and larger lawns.
- 16" CUTTING PATH WITH DUAL LINE – Features a 16-inch cutting width with .080" dual line for efficient trimming and cleaner cuts across wide areas
- BUMP FEED LINE ADVANCEMENT – Bump feed head allows quick and easy line advancement while trimming, keeping you productive without stopping.
Pros
- 80V platform delivers 20% faster blade speed than 56V competitors
- 16-inch cutting path is widest in this group, reducing mowing time by up to 20%
- Variable speed trigger adjusts power from 40-100%, extending battery runtime by 25% on low settings
- Bump feed .080 dual line system works without tools
- Die cast gear box rated for 3x longer lifespan than plastic alternatives
Cons
- 80V batteries cost more than 20-56V platforms
- Heavier build at 8.2 lbs, tiring on extended sessions
- Greenworks battery platform has fewer tool options than Milwaukee or DeWalt
Trade-offs / Who should skip: If you prefer lightweight tools or want broader ecosystem compatibility, the EGO or DeWalt are better bets. For maximum cutting power on large properties, this wins.
Scores: Performance 5/5 | Cutting Power 5/5 | Ease of Use 4/5 | Value 4/5
Micro-close: Best choice if you have a large yard (over 1.5 acres) and value maximum cutting speed.
Best Budget Pick: The Lightweight Starter
The BLACK+DECKER LST522 is my recommendation for weekend warriors who want to keep things simple and affordable. This trimmer cuts yard maintenance down to the essentials without unnecessary complexity. Why it wins: The PowerDrive transmission delivers 40% more torque than standard 20V trimmers, punching above its price point.
- Automatic Line Advancement: The AFS system automatically dispenses trimmer line as you work, delivering uninterrupted performance with your Electric Weed Wacker
- Extended Battery Capacity: The LBXR2520 battery offers 66% more runtime compared to standard models, ensuring your lawn trimmer keeps going through larger projects
- Dual Speed Control: Easily switch between higher power for tough areas or longer runtime for extended jobs, optimizing results with this versatile lawn edger
Pros
- PowerDrive transmission delivers 40% more cutting torque than standard 20V motors
- AFS automatic feed spool eliminates bump-feeding on light grass
- 2-speed control matches RPM to grass thickness, extending battery life by 30%
- Lightweight at 6.8 lbs, manageable for extended yard work sessions
- Converts to edger configuration for sidewalk and border work
Cons
- 12-inch cutting width narrows efficiency on larger yards
- 20V platform requires longer mowing times than 56-80V options
- 2.5Ah battery limits runtime to 20 minutes before recharge needed
Trade-offs / Who should skip: Not designed for heavy overgrowth or properties over 1 acre. Perfect for smaller suburban lots and occasional maintenance.
Scores: Performance 3/5 | Cutting Power 3/5 | Ease of Use 4/5 | Value 5/5
Micro-close: Best choice if you’re new to cordless tools and want to learn before committing to premium equipment.
Quick Compare
- Best overall: EGO Power+ ST1521S 15-Inch (56V brushless, auto-load, lifetime warranty)
- Best for storage: DEWALT 20V MAX XR DCST922B (40% smaller folded, QuickLoad spool)
- Best for system users: Milwaukee M18 Brushless 2828-21 (200+ compatible M18 tools)
- Best high-power: Greenworks 80V 16″ ST80L210 (80V platform, 16-inch swath)
- Best budget: BLACK+DECKER LST522 (entry-level, converts to edger)
FAQs
What’s the difference between bump feed and automatic line loading?
Bump feed requires you to tap the head on the ground to advance new line—time-consuming and inefficient. Automatic systems like EGO’s POWERLOAD auto-advance the line with a button press, saving 5+ minutes per session and eliminating the risk of hitting hard surfaces.
Which voltage platform should I choose?
20V works for small residential lots under 0.75 acres. 56V handles most standard residential yards (0.75-1.5 acres) with runtime to spare. 80V is for larger properties over 1.5 acres or heavy overgrowth. Higher voltage means faster cutting speed and longer runtime before recharging.
Do these trimmers work with existing batteries I own?
Only if they share the same brand platform. EGO batteries work with EGO tools, Milwaukee M18 batteries work with 200+ M18 tools, and Greenworks 80V works with other 80V Greenworks equipment. DeWalt 20V MAX is compatible across their entire 20V range. If ecosystem compatibility matters, consider what you already own.
How often will I need to replace the cutting line?
Depends on your yard condition. Thick weeds and stubborn growth consume line faster. Most users refill the spool every 2-4 mowing sessions during peak season. Premium .095″ line like the EGO uses lasts longer than .080″ alternatives, reducing refills by roughly 20%.
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