BLACK+DECKER or Kobalt? String Trimmers Compared in 2026
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When comparing a black decker vs kobalt string trimmer, you look at how each tool handles your yard work. Both models run on 40V battery power and feature straight shafts for comfortable handling. The main difference lies in their cutting capabilities. One offers a wider swath for faster coverage, while the other provides additional features like automatic line feed and edging conversion. You need to decide which specs match your specific lawn size and maintenance needs.
Key differences
| Aspect | BLACK+DECKER 40V 13-Inch String Trimmer and Edger | Kobalt 40V Max 15-Inch Straight Shaft Trimmer |
|---|---|---|
| Cutting Width | 13 in | 15 in |
| Voltage | 40V | 40V Max |
| Line Feed System | Automatic | not listed |
| Mowing Function | 2-in-1 (Trimmer/Edger) | Trimmer Only |
| Weight | 7.8 pounds | not listed |
Which one should you choose?
Choose BLACK+DECKER 40V 13-Inch String Trimmer and Edger if
- You need a tool that converts to an edger for precise border work.
- You prefer automatic line feed so you do not have to bump the spool.
- You want to see the PowerCommand dial to switch between runtime and power modes.
Choose Kobalt 40V Max 15-Inch Straight Shaft Trimmer if
- You want a wider 15-inch cutting swath to cover more ground per pass.
- You already own Kobalt 40V batteries and prefer a bare tool kit.
- You prioritize a simpler, lighter design without extra conversion mechanisms.
Verdict: The BLACK+DECKER model suits users who need versatility with edging and automatic line feed. The Kobalt option is better for those who prioritize a wider cutting path and already have compatible batteries. Choose based on whether you value extra features or a larger cutting diameter.
Key Spec Differences Explained
Cutting Width
The Kobalt 40V Max model features a 15-inch cutting swath, while the BLACK+DECKER 40V MAX trimmer offers a 13-inch cutting width. This two-inch difference matters if you have larger areas to clear. A wider swath means you make fewer passes to cover the same ground. You might prefer the Kobalt for open lawns where speed is key. The BLACK+DECKER remains capable for tighter spaces or detailed edging work near borders. Both sizes are standard for residential string trimmers, but the extra width on the Kobalt provides a clear advantage for efficiency in open areas.
Drive Type
The BLACK+DECKER unit includes a PowerDrive transmission, which delivers more power from the motor to the cutting string. This feature helps tackle thick weeds and finish yard work faster. The Kobalt listing does not specify a transmission type, so you cannot confirm if it has this specific power-boosting mechanism. If you frequently encounter dense vegetation, the explicit mention of PowerDrive on the BLACK+DECKER model suggests it may handle tough jobs better. For light grass trimming, both tools likely perform adequately, but the transmission detail gives the BLACK+DECKER a technical edge for heavy-duty use.
Line Feed System
The BLACK+DECKER trimmer is equipped with an Automatic Feed Spool (AFS) system. This supplies trimmer line as needed without requiring you to bump the tool against the ground. The Kobalt specification does not mention an automatic feed system, implying it likely uses a manual bump-feed spool. Automatic feed adds convenience during extended trimming sessions by keeping the line at the optimal length. You will spend less time stopping to refill or advance the line manually. This feature makes the BLACK+DECKER more user-friendly for long periods of continuous work compared to the likely manual system on the Kobalt.
Battery Capacity
The BLACK+DECKER kit includes a 2.0Ah lithium-ion battery with a state of charge indicator. This lets you monitor power levels during use. The Kobalt is listed as a bare tool, meaning no battery is included in the box. You would need to purchase a compatible 40V battery separately. If you already own Kobalt 40V batteries, this is not an issue. However, for a complete out-of-the-box experience, the BLACK+DECKER provides the necessary power source. The 2.0Ah capacity is standard for entry-level cordless tools, offering sufficient runtime for typical residential tasks.
Versatility
The BLACK+DECKER model converts from a trimmer to an edger in seconds, offering 2-in-1 functionality. This allows you to handle different landscaping tasks with one tool. The Kobalt is described strictly as a string trimmer with no mention of edging capabilities. If you need to edge sidewalks or flower beds, the BLACK+DECKER provides extra utility without requiring a separate device. For users who only need trimming, this feature is a bonus. The dual-function design makes the BLACK+DECKER a more versatile choice for general yard maintenance compared to the single-purpose Kobalt trimmer.
Which String Trimmer Fits Your Yard
Users wanting automatic line feed convenience
The BLACK+DECKER model includes an Automatic Feed Spool system. This feature supplies trimmer line as needed without requiring you to bump the head against the ground. It enhances convenience during extended trimming sessions. You save time and effort because the tool manages line extension automatically, keeping the cutting string ready for thick weeds or grass without interruption.
Cutters needing a wider swath for efficiency
The Kobalt trimmer offers a 15-inch cutting swath. This is two inches wider than the competing 13-inch model. A wider cutting path allows you to clear larger areas with fewer passes. If you have expansive lawns or thick brush, this extra width helps you finish yard work faster by covering more ground with each stroke of the trimmer.
Those valuing adjustable power settings
This BLACK+DECKER trimmer features a PowerCommand Dial. It lets you choose between maximum power for tough weeds or maximum runtime for longer areas. This versatility allows you to tailor the tool's performance to the specific task at hand. You can optimize for cutting strength or battery life depending on the density of the vegetation you are trimming.
The products compared
BLACK+DECKER 40V 13-Inch String Trimmer and Edger
Best for: Small yards needing trimmer and edger versatility
- Voltage
- 40V
- Cutting Swath
- 13 in
- Power Source
- battery
- Line Feed System
- automatic
- Battery Capacity
- 2.0Ah
- Cutting Width
- 13-Inch
View on Amazon: BLACK+DECKER 40V 13-Inch String Trimmer and Edger Affiliate link
This 40V cordless string trimmer features a 13-inch cutting swath and a 2.0Ah battery. It operates at 8500 RPM and includes an automatic feed spool. The telescoping pole adjusts for height, and the 7.8-pound weight aids maneuverability. You can convert it to an edger quickly. This model suits users who want a versatile tool for smaller yards without the bulk of larger systems.
Pros
- Automatic feed spool eliminates manual bumping
- Converts to edger in seconds
- Fast charger restores power in 2 hours
- PowerCommand dial switches between power and runtime
Cons
- 13-inch cutting width is narrower than competitors
- 7.8-pound weight is heavier than bare tools
- 2.0Ah battery capacity is modest for large areas
Good fit if
- You need a 2-in-1 trimmer and edger
- You prefer automatic line feed over bumping
- You have a small to medium lawn
Skip if
- You require a 15-inch cutting width
- You want a lightweight bare tool
- You need extended runtime for large properties
Verdict: BLACK+DECKER 40V 13-Inch Trimmer fits users who value the convenience of automatic line feed and edging capability over maximum cutting width. It is a solid option for smaller yards where versatility matters more than raw power.
Kobalt 40V Max 15-Inch Straight Shaft Trimmer
Best for: existing Kobalt battery owners needing a straight shaft
- Voltage
- 40V Max
- Cutting Swath
- 15 in
- Power Source
- cordless
- Shaft Type
- straight
- Cutting Width
- 15-Inch
- Included Battery
- Tool Only
View on Amazon: Kobalt 40V Max 15-Inch Straight Shaft Trimmer Affiliate link
This Kobalt bare tool offers a 15-inch cutting swath for clearing grass and weeds. The straight shaft design suits taller users or those preferring a rigid handle. It runs on the 40V Max battery system, though the battery is not included. At 38 inches long, it provides reach for standard yard work. You get a cordless, battery-powered unit that integrates with existing Kobalt power tools.
Pros
- 15-inch cutting width for efficient clearing
- Straight shaft for ergonomic handling
- 40V Max battery compatibility
- Cordless design for unrestricted movement
Cons
- Sold as a bare tool without a battery
- No battery charger included in the package
- Limited to 40V Max power output
Good fit if
- You already own Kobalt 40V Max batteries
- You prefer a straight shaft for reach
- You need a 15-inch cutting swath
Skip if
- You do not have compatible batteries
- You want a curved shaft for precision
- You need a complete kit with battery
Verdict: Kobalt 40V 15-in Straight String Trimmer is a solid addition for existing Kobalt users who need a straight-shaft trimmer with a 15-inch cut. It is best for those who already own the necessary battery and charger.
Specifications side by side
| Spec | BLACK+DECKER 40V 13-Inch String Trimmer and Edger | Kobalt 40V Max 15-Inch Straight Shaft Trimmer |
|---|---|---|
| Voltage | 40V | 40V Max |
| Cutting Swath | 13 in | 15 in |
| Power Source | battery | cordless |
| Shaft Type | not stated | straight |
| Line Feed System | automatic | not stated |
| Battery Capacity | 2.0Ah | not stated |
| Cutting Width | 13-Inch | 15-Inch |
| Mowing Function | 2-in-1 | not stated |
| Application | Lawn | not stated |
| Included Battery | not stated | Tool Only |
| Dimensions | 46.5 × 13.5 × 11 inches | 38 × 12 × 5 inches |
| Weight | 7.8 pounds | not stated |
| Size | 46.5"L x 13.5"W x 11"H | 15-in |
| Color | Orange | Multicolor |
| Model | LST136 | not stated |
Frequently asked questions
Does the BLACK+DECKER trimmer have an edging function?
Yes, the BLACK+DECKER 40V 13-Inch String Trimmer and Edger offers a 2-in-1 mowing function. You can switch between trimming and edging modes. This versatility makes it suitable for small yards where you need to clean up along sidewalks and borders without switching tools.
Is the Kobalt trimmer tool only or does it include a battery?
The Kobalt 40V Max 15-Inch Straight Shaft Trimmer is sold as tool only. It does not include a battery or charger in the package. You will need to use an existing Kobalt 40V Max battery if you already own one from the same brand ecosystem.
Which string trimmer is lighter to carry?
The BLACK+DECKER model weighs 7.8 pounds. The Kobalt model dimensions are listed as 38 inches in length, but its weight is not specified in the data. If weight is a priority for extended use, the BLACK+DECKER unit has a documented lighter profile for easier handling.
Can I use this trimmer for both grass and weeds?
Both units are designed for lawn applications using cordless power. The BLACK+DECKER model is explicitly rated for lawn use. The Kobalt model is a string trimmer intended for similar yard maintenance tasks. You can use either tool to trim grass edges and clear light weeds from your property.
What is the difference in shaft style between the two?
Both the BLACK+DECKER and Kobalt models feature straight shaft designs. This configuration allows for comfortable handling and better balance when trimming. The straight shafts help reduce fatigue compared to curved shafts, making them suitable for various yard tasks without awkward wrist positioning during operation.
Which model has the wider cutting width?
The Kobalt 40V Max 15-Inch Straight Shaft Trimmer has the wider cutting width. It offers a 15-inch swath compared to the 13-inch width of the BLACK+DECKER model. The additional two inches allows you to clear more vegetation with each pass, potentially speeding up your work in larger areas.