Keeping your lawn looking sharp means taming the unruly edges, thick grass, and stubborn weeds that mowers can't reach. A quality string trimmer, AKA a weed wacker, is the essential tool for making quick work of these tasks. But with so many options, how do you choose the right one for your yard?
This comprehensive guide will walk you through the most important features to consider and provide in-depth reviews of the top electric models on the market, helping you find the perfect tool for your needs.
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How to Choose the Perfect Electric String Trimmer
Before you look at specific models, understanding these key features will help you narrow down your choices and select a trimmer you'll be happy with for years to come.
Electric String Trimmers Comparison Table
To help you compare these top models side-by-side, here is a detailed comparison table highlighting their key features and specifications.
| Model | Power Source | Cutting Width | Line Feed System | Weight | Best For |
| B&D BESTE620 | Corded (6.5 Amp) | 14" | Push-Button | 5.3 lbs | All-Around Corded Power |
| B&D ST8600 | Corded (5.0 Amp) | 13" | Automatic (AFS) | 4.5 lbs | Automatic Feed Convenience |
| WORX WG163 GT 3.0 | Cordless (20V) | 12" | Push-Button | 5.3 lbs | Lightweight Cordless Use |
| B&D LSTE525 | Cordless (20V) | 12" | Push-Button | 6.3 lbs | Balancing Power & Runtime |
| GreenWorks G-MAX | Cordless (40V) | 12" | Automatic | 9.2 lbs | Blower Combo & Long Runtime |
| B&D MTC220 | Cordless (20V) | 12" | Automatic (AFS) | 10.2 lbs | 3-in-1 Versatility (Small Yards) |
| DEWALT DCST922P1 | Cordless (20V) | 14" | Bump Feed | 8.5 lbs | Pro-Grade Power & Durability |
| WORX WG170 GT | Cordless (20V) | 12" | Push-Button | 5.5 lbs | Maximum Adjustability (3-in-1) |
Power Source: Corded vs. Cordless
This is the most important decision you'll make. Electric trimmers are powered either by a cord plugged into an outlet or by a rechargeable battery.
| Type | Pros | Cons |
| Corded Electric | ✓ Unlimited runtime ✓ Consistent, reliable power ✓ Generally lighter and more affordable | ✗ Limited by cord length ✗ Cord can be cumbersome to manage ✗ Not practical for very large yards |
| Cordless (Battery) | ✓ Complete freedom of movement ✓ No cord to manage or trip over ✓ Perfect for large or complex yards | ✗ Limited runtime (20-45 minutes) ✗ Batteries add weight ✗ Can be more expensive |
Line Feed Systems Explained
The feed system is how the trimmer extends more cutting line from the spool as it wears down.
- Bump Feed: This is a manual system where you gently "bump" the trimmer head on the ground to release more line. It gives you more control over how much line you use but requires a bit of practice.
- Automatic Feed (AFS): This system automatically releases more line whenever it senses the string has gotten too short, often using centrifugal force. It's incredibly convenient and requires no intervention, but you have less control over line usage, and it can be more complex to fix if it breaks.
(See our post on the best string trimmer line.)
Cutting Width
Measured in inches, the cutting width (or swath) is the diameter of the circle the string cuts.
- Larger Width (12-14 inches): Clears large, open areas faster.
- Smaller Width (10-12 inches): Easier to control in tight spaces and around delicate garden beds.
Trimmer & Edger Combos
Many modern string trimmers are convertible, easily changing from a horizontal trimmer to a vertical edger. This 2-in-1 functionality is perfect for creating clean, crisp lines along sidewalks, driveways, and flower beds. If you want this feature, look for models with a guide wheel to help you achieve straight, professional-looking edges.
Ergonomics: Weight, Balance, and Handles
A comfortable trimmer is one you'll actually use. Pay attention to:
- Weight: A lighter tool reduces fatigue, especially during long jobs. Battery-powered models are typically heavier than corded ones.
- Adjustable Shaft & Handle: Look for models with telescoping shafts and adjustable handles to match your height and working style, ensuring a comfortable posture.
Best Electric Weed Wacker Under $100
1. BLACK+DECKER BESTE620 Electric String Trimmer
Best For: All-around performance and power in a corded model.
This trimmer’s powerful 6.5-amp motor and Power Drive Transmission cut through tough weeds and overgrowth with ease. It features an "Easy Feed" button that advances the line without any bumping. The 2-in-1 design easily converts to a wheeled edger for crisp, clean lines, while the adjustable handle and lightweight build ensure comfort and control. A cord retention system prevents accidental unplugging.
- Pros:
- Powerful 6.5-amp motor
- Convenient push-button line feed
- Excellent 2-in-1 wheeled edger functionality
- Cons:
- The motor can get hot during extended use
2. BLACK+DECKER ST8600 String Trimmer / Edger
Best For: Homeowners who prefer a convenient, automatic feed system.
Powered by a solid 5.0-amp motor, this trimmer features an Automatic Feed Spool (AFS) that ensures you always have the right amount of line without stopping. The adjustable height and pivoting handle provide a custom fit for comfortable trimming. It also includes an edge guide for precise results when detailing your lawn borders.
- Pros:
- Reliable automatic feed system (AFS)
- Adjustable height and pivoting handle
- Edge guide ensures precise edging
- Cons:
- Adjusting the handle length can be difficult
3. WORX WG163 GT 3.0 Cordless String Trimmer & Edger
Best For: Cordless convenience and innovative features on a budget.
This versatile 20V cordless tool easily converts from a trimmer to an inline wheeled edger. The innovative Command Feed system lets you extend the line instantly with the push of a button. Its head tilts 90 degrees to handle sloped or uneven terrain, and an adjustable spacer guard protects flowers and ornaments from accidental damage. At just 5.3 lbs, it’s exceptionally lightweight.
- Pros:
- Lightweight and easy to handle
- Push-button line feed is very convenient
- Includes two batteries for extended runtime
- Cons:
- The feed system can be tricky to fix if the line tangles
4. BLACK+DECKER LSTE525 20V MAX Lithium Easy Feed String Trimmer
Best For: Balancing power and runtime in a cordless model.
This trimmer gives you the best of both worlds with a 2-speed control switch: choose more power for tough spots or longer runtime for bigger jobs. Its Power Drive Transmission delivers extra torque for cutting through thick overgrowth. The EASY FEED button advances the line without bumping, and it converts easily to a wheeled edger for detailed work.
- Pros:
- 2-speed control for power or runtime
- Push-button Easy Feed system
- Excellent torque for tough weeds
- Cons:
- Battery can take a long time to fully charge
Best Electric Weed Wacker Above $100
5. GreenWorks G-MAX 40V Cordless String Trimmer (STBA40B210)
Best For: Large yards and clearing tough debris.
This GreenWorks model is a powerhouse, offering up to 45 minutes of runtime on its 40V G-MAX battery. What sets it apart is the innovative axial fan design, which allows it to double as a powerful leaf blower, producing speeds of 100 MPH to handle tough clearing jobs. It’s lightweight with an adjustable handle and a variable speed trigger for ultimate control.
- Pros:
- Doubles as a powerful axial fan blower
- Excellent 45-minute runtime
- Variable speed trigger for precise power control
- Cons:
- The battery can take a while to charge
6. BLACK+DECKER MTC220 3-in-1 Lawn Mower, String Trimmer, & Edger
Best For: Small yards with limited storage space.
This unique 3-in-1 tool is the ultimate space-saver. It features a string trimmer that clicks into a mower deck for small-lawn mowing, and it also functions as an edger. The Automatic Feed System (AFS) ensures continuous work without bumping. With its gear-driven Power Drive Transmission, it maintains speed and won’t bog down in thick grass.
- Pros:
- Incredibly versatile 3-in-1 mower, trimmer, and edger
- Automatic Feed System (AFS) for continuous trimming
- Perfect for homes with very limited storage
- Cons:
- The mower function is only suitable for very small, flat lawns
7. DEWALT 20V MAX String Trimmer, 5-Ah (DCST922P1)
Best For: Homeowners seeking professional-grade power and durability, especially those already using DEWALT 20V MAX* tools.
At the heart of this trimmer is a highly efficient brushless motor, which delivers both impressive power and a long lifespan while maximizing runtime from the battery. The wide 14-inch cutting swath clears large areas quickly, while the patented gear drive design provides the torque needed to power through thick weeds and overgrowth without bogging down.
You get total control with the variable speed trigger and a Hi/Lo speed switch, allowing you to choose maximum power for tough weeds or extended runtime for lighter tasks. This kit includes a high-capacity 5.0Ah battery that’s part of the versatile DEWALT 20V MAX* system, interchangeable with dozens of other tools. Despite its robust build, it remains well-balanced and comfortable to operate.
- Pros:
- Efficient brushless motor provides more power and longer life
- Wide 14-inch cutting swath for faster work
- Hi/Lo speed control to balance power and runtime
- Includes a powerful, long-lasting 5.0Ah battery
- Cons:
- Premium price point
- Can be heavy for some users with the large battery installed
8. WORX WG170 GT Revolution Grass Trimmer/Edger/Mini-Mower
Best For: A 3-in-1 tool with maximum adjustability.
The GT Revolution is a true multi-tool. It functions as a trimmer, a dual-wheeled edger, and even a "mini-mower" for hard-to-reach spots. The Command Feed system provides instant line when you need it. What makes it stand out is its extreme adjustability: a 7-position telescoping shaft and a 6-position adjustable head ensure you can find the perfect angle for any job.
- Pros:
- Highly flexible 3-in-1 design
- Fully adjustable shaft and head for ultimate comfort
- Dual wheels provide excellent support in edger mode
- Cons:
- The handles could be more ergonomic
Making Your Choice
Choosing the best electric weed wacker comes down to your yard and your priorities.
- For small-to-medium yards with easy outlet access, a corded trimmer like the BLACK+DECKER BESTE620 offers unbeatable power and value.
- For larger yards or maximum convenience, a cordless trimmer is the way to go. The WORX WG163 is a fantastic lightweight option, while the DEWALT DCST922P1 brings professional-grade power.
By considering your lawn size, budget, and desired features, you can confidently select a string trimmer that will keep your yard looking beautiful for years to come.
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