BLACK+DECKER 40V MAX 13 in Review (2026): A Spec-Based Look
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This black decker 40v max 13 in review focuses on the LST136 model, a cordless string trimmer and edger. It is defined by its 13-inch cutting swath and 40V MAX lithium-ion battery. The unit weighs 7.8 pounds and includes a 2.0Ah battery. You get a 2-in-1 tool that converts from trimmer to edger. It features an automatic feed spool and a PowerCommand dial. This dial lets you switch between max power and max runtime. The motor runs at up to 8500 RPM. The fast charger restores full power in two hours or less. It is designed for small to medium lawns.
What stands out
- 2-in-1 conversion from trimmer to edger
- Automatic Feed Spool for line supply
- PowerCommand dial for power vs runtime
- 40V MAX 2.0Ah battery included
- Fast charger restores power in 2 hours
Who it fits
Good fit for
This tool suits users with small yards or tight spaces. The 13-inch cutting width is ideal for trimming along fences, sidewalks, and garden beds. You will appreciate the automatic feed spool if you want to avoid stopping to bump the spool for more line. The adjustable telescoping pole helps you reach difficult areas without bending. The lightweight design at 7.8 pounds reduces fatigue during short sessions. It is also a good choice if you already own other 40V MAX BLACK+DECKER tools.
Who should skip it
Skip this model if you need to mow grass. This is a string trimmer, not a lawn mower. It lacks a deck or mulching capability. You should look elsewhere if you have large, open lawns. The 13-inch swath is too narrow for efficient large-area coverage. The 2.0Ah battery may not last long enough for extensive jobs. If you require a dedicated edger with a metal blade, this plastic string head may not meet your durability needs. This unit is for edging and trimming, not mowing.
Verdict: This is a capable trimmer and edger for small spaces. It offers convenience through automatic line feed and quick conversion. It is not a substitute for a lawn mower.
Key specs explained for this trimmer
Voltage: 40V
This voltage rating indicates the power level of the lithium-ion battery system. You get enough torque to cut through moderate weeds and grass without the drag of a cord. When comparing cordless lawn mowers, higher voltage often correlates with better performance on thicker vegetation. This 40V system is standard for handheld tools, offering a balance of runtime and cutting strength for typical residential yards.
Cutting Swath: 13 in
The 13-inch width defines how much area the cutting string clears in a single pass. A narrower swath like this allows for precise maneuvering around garden beds, fences, and tree trunks. While larger mowers cover more ground quickly, this size is ideal for detailed edging and trimming tasks where precision matters more than raw speed. It helps you clean up edges efficiently.
Battery Capacity: 2.0Ah
The 2.0Ah capacity determines how long the tool runs on a single charge before needing a recharge. This capacity supports moderate use sessions, such as trimming a medium-sized lawn or maintaining garden edges. If you have a larger property, you might need a spare battery to avoid interruptions. Compare this with higher capacity options if you plan extended continuous use without pauses.
Line Feed System: automatic
The automatic feed system releases trimmer line as needed without requiring you to bump the head on the ground. This feature keeps the cutting line at the optimal length continuously, improving efficiency and reducing frustration. You can maintain a consistent cut while moving along fences or obstacles. This convenience is a significant upgrade over manual bump-feed systems found in many basic trimmers.
Design and build overview
According to the listing, this BLACK+DECKER model is built for versatility. The orange plastic housing provides a distinct visual identity. The unit measures 46.5 inches in length, 13.5 inches in width, and 11 inches in height. This telescoping pole design allows you to adjust the height for comfort. You can reach tall weeds without excessive bending. The soft-grip handle is included to reduce hand fatigue during extended trimming sessions.
The device weighs 7.8 pounds. This lightweight construction makes it easy to maneuver around tight garden edges and flower beds. You can carry it comfortably for long periods. The 13-inch cutting swath is defined by the string head. This width is suitable for small to medium yards. It helps you clear grass and weeds efficiently along driveways or fences.
The layout includes a PowerCommand dial. You use this control to switch between maximum power for thick weeds and maximum runtime for larger areas. This dial lets you manage battery life based on your specific task. The automatic feed spool system supplies line as needed. You do not need to bump the head to advance the string. This feature keeps the cutting process smooth and continuous. The overall design prioritizes ease of use and adaptability for various landscaping tasks.
Setup and everyday use
Setting up this BLACK+DECKER unit requires minimal effort. The listing describes a telescoping pole that adjusts for your height. You attach the 2.0Ah battery to the base. The fast charger restores full power in two hours or less, ensuring the tool is ready for your next session. The 40V MAX lithium-ion battery includes a state of charge indicator, so you can monitor levels during extended use without guessing.
Daily operation relies on the PowerCommand Dial. This feature lets you toggle between maximum power for thick weeds and maximum runtime for larger areas. This adjustment helps you manage battery efficiency based on your immediate needs. The motor operates at speeds up to 8500 RPM, delivering consistent cutting performance through the 13-inch swath. The Automatic Feed Spool (AFS) system supplies line as needed. You do not need to bump the head to extend the trimmer line, which simplifies the trimming process.
Conversion between trimmer and edger modes takes seconds. This versatility allows you to handle different landscaping tasks without switching tools. The soft-grip handle and adjustable height contribute to comfort during extended use. The PowerDrive transmission sends more power from the motor to the cutting string, helping you finish yard work faster. The unit weighs 7.8 pounds, making it manageable for most users. You can navigate tight spaces or edging along sidewalks with ease. The design prioritizes straightforward operation and reliable performance for routine lawn maintenance.
Before You Buy This Trimmer
This tool is a trimmer and edger, not a mower. It will not cut your lawn. You need a separate cordless lawn mower for that task. This BLACK+DECKER unit handles edges and weeds along sidewalks or fences. Check your existing battery ecosystem. The 40V MAX battery is specific to this brand. If you already own other 40V tools, this battery fits them. If not, you must buy the kit. The 2.0Ah capacity offers limited runtime. You may need a spare battery for larger yards. The automatic feed spool reduces maintenance. You do not need to bump the head to extend line. Keep the cutting area clear of debris. This device complements a mower by cleaning up edges. It does not replace mowing. Plan your workflow around this limitation. It works best as a secondary tool for precision work after mowing. Verify the telescoping pole fits your height. Adjust it before starting to avoid strain.
Check before you buy
- Confirm you have a separate cordless lawn mower for main cutting.
- Check if you own other 40V MAX batteries for compatibility.
- Ensure the 2.0Ah battery runtime suits your yard size.
- Verify the telescoping pole adjusts to your comfortable working height.
The product at a glance
BLACK+DECKER 40V 13-Inch String Trimmer and Edger
Best for: Small yard trimming and edging tasks
- 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 MAX cordless string trimmer and edger features a 13-inch cutting swath and a 2.0Ah battery. It operates at up to 8500 RPM and weighs 7.8 pounds. The PowerCommand dial lets you switch between max power and runtime. An automatic feed spool adds line without bumping. It converts to an edger quickly. This tool suits users needing a lightweight, versatile trimmer for small to medium yards.
Pros
- Automatic feed spool system for continuous line supply
- PowerCommand dial for power or runtime selection
- Converts from trimmer to edger in seconds
- Fast charger restores battery in 2 hours or less
Cons
- 7.8-pound weight may cause fatigue during long sessions
- 2.0Ah battery capacity limits extended runtime
- 13-inch cutting width restricts efficiency on large areas
Good fit if
- You need a lightweight tool for small yards
- You want a 2-in-1 trimmer and edger
- You prefer automatic line feed for convenience
Skip if
- You require a battery larger than 2.0Ah
- You need a cutting width wider than 13 inches
- You want a commercial-grade heavy-duty tool
Verdict: BLACK+DECKER 40V 13 in Trimmer offers a compact, versatile solution for light trimming tasks. It fits homeowners with small yards who value quick conversion between trimming and edging modes.
Specifications side by side
| Spec | BLACK+DECKER 40V 13-Inch String Trimmer and Edger |
|---|---|
| Voltage | 40V |
| Cutting Swath | 13 in |
| Power Source | battery |
| Line Feed System | automatic |
| Battery Capacity | 2.0Ah |
| Cutting Width | 13-Inch |
| Mowing Function | 2-in-1 |
| Application | Lawn |
| Dimensions | 46.5 × 13.5 × 11 inches |
| Weight | 7.8 pounds |
| Size | 46.5"L x 13.5"W x 11"H |
| Color | Orange |
| Model | LST136 |
Frequently asked questions
What is the cutting width of the BLACK+DECKER 40V 13-Inch String Trimmer?
The cutting width is 13 inches. This measurement defines the swath of grass or weeds the tool clears in a single pass. A 13-inch width suits small yards and tight spaces. It allows you to trim along edges without excessive overlap. This size balances maneuverability with efficiency for light-duty tasks.
How much does the BLACK+DECKER LST136 weigh?
The unit weighs 7.8 pounds. This weight includes the motor and housing but excludes the battery. A lighter tool reduces fatigue during extended use. You can hold it comfortably for trimming along fences or sidewalks. The manageable weight makes it suitable for users who prefer less physical strain.
Is this tool a lawn mower or a trimmer?
It is a string trimmer and edger, not a lawn mower. It cannot cut a full lawn surface. You use it for edges, weeds, and hard-to-reach grass. It complements a separate cordless mower. This distinction is critical if you need primary lawn cutting rather than maintenance trimming.
What voltage battery does this BLACK+DECKER model use?
It uses a 40V MAX lithium-ion battery. This voltage provides sufficient power for moderate weeds and grass. The 40V system is part of BLACK+DECKER’s compatible battery ecosystem. You can often share batteries with other 40V tools. This ensures you have power reserves for different tasks around the yard.
Does the BLACK+DECKER 13-inch trimmer have a telescoping pole?
Yes, the listing describes a telescoping pole design. This feature allows you to adjust the length for your height. It improves comfort and reduces bending. You can customize the reach for your specific needs. This adjustability enhances control when trimming at different heights or angles.
What is the best use case for this 13-inch trimmer?
It is best for small yard trimming and edging tasks. The compact 13-inch width excels in tight spaces. You can easily navigate around garden beds, fences, and sidewalks. It offers quick conversion between trimming and edging modes. This versatility makes it ideal for maintaining edges rather than large lawn areas.