Top Battery String Trimmers for a Clean Edge
For most homeowners, the EGO Power+ ST1623T is the best battery string trimmer because it offers commercial grade power with a 16 inch cutting swath and a quick load head, all without the noise and fumes of gas. Its main limitation is the price, which is higher than many battery models, but owners report that the performance justifies the cost.
Battery string trimmers have come a long way. They offer quiet operation, zero emissions, and instant start. No more pulling cords or mixing fuel.
Modern lithium ion batteries and brushless motors deliver power that rivals gas. You can trim, edge, and even tackle heavy weeds. This guide helps you choose the right one for your yard.
What matters most
Our top picks
EGO Power+ ST1623T 16-Inch 56-Volt Lithium-Ion Cordless String Trimmer
The EGO ST1623T is a powerhouse. It has a 16 inch cutting swath and a brushless motor that delivers gas like torque. The Powerload head feeds line automatically with a push of a button. Owners report it easily cuts through thick weeds and brambles. The battery lasts long enough for typical suburban lots. It is heavier than some, but the adjustable handle and strap help.
Pros
- Powerful brushless motor
- Toolless line loading
- Long runtime
Cons
- Expensive
- Heavier than average
DEWALT 20V MAX XR Brushless String Trimmer, 15-Inch, Tool Only (DCST972X1)
The DEWALT DCST972X1 is a professional grade trimmer. It uses a brushless motor and a 15 inch cutting swath. It accepts universal attachments, so you can convert it to an edger or pole saw. The variable speed trigger gives you control. Owners appreciate the durability and the ability to use their existing Dewalt batteries. It is a tool only, so you need a battery and charger.
Pros
- Accepts universal attachments
- Durable build
- Variable speed
Cons
- Battery and charger sold separately
- Slightly louder
BLACK+DECKER 20V MAX Lithium Ion Cordless String Trimmer/Edger (LST522)
The BLACK+DECKER LST522 is a lightweight trimmer that converts to an edger with a push of a button. It has a 13 inch cutting swath and an automatic feed spool. It is perfect for small to medium yards. Owners like the ease of use and the low price. The battery runtime is modest, so it suits quick touch ups.
Pros
- Affordable
- Converts to edger
- Lightweight
Cons
- Shorter runtime
- Not for heavy weeds
Greenworks 24V 12-Inch Cordless String Trimmer (2102002)
The Greenworks 24V trimmer is one of the lightest on the market at just over 5 pounds. It has a 12 inch cutting swath and an adjustable auxiliary handle. It is ideal for small yards and for users who want minimal fatigue. The bump feed is reliable. Owners report it is easy to maneuver around flower beds and fences.
Pros
- Very lightweight
- Easy to handle
- Good for small yards
Cons
- Less power
- Smaller swath
Ryobi 18V ONE+ HP Brushless 13 in. Cordless String Trimmer (P20181)
The Ryobi P20181 is part of the ONE+ system, so it works with over 300 tools. It has a brushless motor and a 13 inch cutting swath. It features a variable speed trigger and a curved shaft for balance. Owners like the quiet operation and the ability to share batteries with other Ryobi tools. The bump feed is simple.
Pros
- Shares battery platform
- Brushless for efficiency
- Quiet
Cons
- Battery not included (tool only)
- Not as powerful as 56V
Milwaukee M18 FUEL 15 in. Quik-Lok String Trimmer (2825-21HD)
The Milwaukee M18 FUEL trimmer is built for the toughest jobs. It has a 15 inch cutting swath and a brushless motor that delivers incredible torque. The Quik-Lok system lets you attach different heads. It comes with a high output battery and charger. Owners report it handles thick brush with ease. It is heavy, but the harness helps.
Pros
- Extreme power
- Quik-Lok attachments
- Rapid Load head
Cons
- Pricey
- Heavy
Snapper 82V 17-Inch Cordless String Trimmer (82V-SST170)
The Snapper 82V trimmer offers a massive 17 inch cutting swath, reducing trimming time. It has a brushless motor and an adjustable handle. The bump feed is easy. Owners say it is powerful and the battery lasts well. It is one of the few trimmers with a 17 inch swath, making it ideal for large properties.
Pros
- Widest cutting swath
- Powerful
- Long runtime
Cons
- Heavier
- Battery and charger sold separately
The lineup, side by side
| # | Model | Voltage | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | EGO Power+ ST1623T 16-Inch 56-Volt Lithium-Ion Cordless String Trimmer | 56V | Large yards and tough jobs | 9.4 | Check price |
| 2 | DEWALT 20V MAX XR Brushless String Trimmer, 15-Inch, Tool Only (DCST972X1) | 20V MAX | Dewalt users and heavy trimming | 9.1 | Check price |
| 3 | BLACK+DECKER 20V MAX Lithium Ion Cordless String Trimmer/Edger (LST522) | 20V MAX | Small yards and budget shoppers | 8.5 | Check price |
| 4 | Greenworks 24V 12-Inch Cordless String Trimmer (2102002) | 24V | Compact and easy handling | 8.3 | Check price |
| 5 | Ryobi 18V ONE+ HP Brushless 13 in. Cordless String Trimmer (P20181) | 18V ONE+ HP | Ryobi 18V ecosystem users | 8.8 | Check price |
| 6 | Milwaukee M18 FUEL 15 in. Quik-Lok String Trimmer (2825-21HD) | M18 FUEL | Contractors and demanding users | 9.2 | Check price |
| 7 | Snapper 82V 17-Inch Cordless String Trimmer (82V-SST170) | 82V | Wide cutting swath and large areas | 8.9 | Check price |
Good to know
How long does a battery string trimmer battery last?
Most batteries last between 20 and 60 minutes per charge. Higher voltage and amp hours extend runtime. For example, a 5Ah battery might last 30 to 45 minutes. You can buy a second battery to double your work time.
Can battery string trimmers handle thick weeds?
Yes, many can. Look for models with at least 40V and a brushless motor. The EGO and Milwaukee models are known for cutting thick weeds. Some also accept different line sizes for tougher jobs.
What is the difference between 20V and 40V trimmers?
Voltage indicates power. Higher voltage generally means more torque and ability to cut thicker vegetation. 20V is fine for small yards and light grass. 40V and above is better for large yards and dense growth.
Do battery string trimmers use the same line as gas trimmers?
Yes, they use standard trimmer line. The line diameter may vary. Most battery trimmers use .065 to .080 inch line. Some heavy duty models can use .095 inch. Check your trimmer’s specifications.
Are battery string trimmers as powerful as gas?
Modern battery trimmers are close. Some like the EGO and Milwaukee are comparable to gas. They have instant torque and no emissions. For most homeowners, battery power is sufficient. For commercial use, gas may still have an edge.
Can I use a battery string trimmer to edge?
Yes, many trimmers can convert to edging. Some have a pivot function that turns the head 90 degrees. Others require an attachment. Check the product description for edging capability.
What is the best way to store a battery string trimmer?
Store it in a dry place. Remove the battery if you will not use it for a long time. Keep the battery at room temperature. Avoid extreme heat or cold. Hang the trimmer to save space and protect the shaft.
Do I need a harness for a battery string trimmer?
For heavier models, a harness helps distribute weight. Many come with a shoulder strap. If you have a large yard or back problems, consider a model with a harness. Lightweight trimmers may not need one.
Are battery string trimmers environmentally friendly?
Yes, they produce zero emissions and are quieter than gas trimmers. They reduce air and noise pollution. Batteries are recyclable. They are a more sustainable choice for yard care.
How often should I replace the trimmer line?
It depends on usage. On average, you may need to replace the line every few uses. Bump feed systems allow you to tap to release more line. When the line is too short, it will not cut effectively. Replace the spool when it is empty.
Our take
For most homeowners, the EGO Power+ ST1623T offers the best balance of power, runtime, and convenience, despite its higher price. If you need professional grade durability and have a Dewalt or Milwaukee battery system, those models are excellent. For budget shoppers, the BLACK+DECKER LST522 is a solid, cheap option for small yards. Choose the EGO if you want the best all around performance and are willing to invest in a quality tool.
