Tackling overgrown weeds and maintaining a neat lawn can be a tiresome chore. The right string trimmer makes all the difference, transforming a demanding task into a manageable one. The BLACK+DECKER LST136 40V MAX 13-inch String Trimmer is designed to provide robust performance for residential lawn care, promising to cut through tough growth with ease and efficiency. It aims to simplify your yard work with its cordless design and intelligent features, making it a strong contender in the Lawn Care & Mowing category.

In this BLACK+DECKER LST136 MAX 13-inch String Trimmer review for 2026, we’ll delve into its specifications, highlight its strengths and weaknesses, and explore how it stands up to the competition. Our analysis is based on manufacturer specs and aggregated user feedback, providing an objective look at its capabilities. We compare it against the CRAFTSMAN V20 13-inch Cordless String Trimmer Kit, the EGO POWER+ 16″ Cordless Weed Trimmer ST1623T, and the WORX WG163 20V 12″ Cordless String Trimmer & Edger to help you make an informed decision.

BLACK+DECKER LST136 40V MAX 13-inch String Trimmer

BLACK+DECKER LST136 40V MAX 13-inch String Trimmer

String Trimmers
amazon.com

Our Verdict

The BLACK+DECKER LST136 40V MAX 13-inch String Trimmer offers powerful performance for tackling tough weeds and overgrowth, thanks to its 40V MAX lithium ion battery and POWERDRIVE Transmission. Its Automatic Feed Spool and quick conversion to an edger enhance convenience, making it a versatile tool for various landscaping tasks.

✔ Pros
  • High-performance 40V Max* lithium ion battery
  • PowerCommand Dial for adjustable power/runtime
  • PowerDrive Transmission for enhanced cutting power
  • Automatic Feed Spool (AFS) for continuous trimming
  • Fast charging (2 hours or less)
  • Easy conversion from trimmer to edger
  • Adjustable height and soft-grip handle for comfort
✘ Cons
  • Battery runtime may vary based on usage intensity
  • May require additional batteries for larger properties
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Specifications

SpecValueSpecValue
Power SourceBattery PoweredWeight7.8 pounds
Warranty2 years warrantyIn the BoxLST136 40V MAX* Lithium Cordless Trimmer/Edg 40V MAX* High Performance Lithium Ion Battery(1) LBXR36(1) LCS36 40V MAX* Fast Charger(1) AF-100 Spool(1) Guard(1) Auxiliary Handle

In-Depth Review: BLACK+DECKER LST136 40V MAX 13-inch String Trimmer

Unrivaled Power and Efficiency

The BLACK+DECKER LST136 40V MAX 13-inch String Trimmer is engineered for serious yard work, leveraging a high-performance 40V MAX lithium ion battery. This robust power source, coupled with the innovative POWERDRIVE Transmission, ensures that power is efficiently transferred to the cutting string, allowing for faster completion of tasks. Users can expect reliable performance when confronting dense weeds and stubborn overgrowth, making it a dependable tool for maintaining a pristine lawn. The PowerCommand Dial further enhances this, letting you toggle between maximum power for challenging areas and maximum runtime for extended trimming sessions.

Seamless Line Management with AFS

One of the most appreciated features of the BLACK+DECKER LST136 MAX 13-inch String Trimmer is its Automatic Feed Spool (AFS) system. This intelligent design eliminates the need for manual bumping to advance the trimmer line, ensuring continuous operation and reducing interruptions during your work. This means less frustration and more efficient trimming, allowing you to focus on the task at hand rather than constantly adjusting the line. This convenience sets it apart, especially for those who value uninterrupted workflow.

Versatile 2-in-1 Functionality

The BLACK+DECKER LST136 MAX 13-inch String Trimmer seamlessly transitions from a string trimmer to an edger in mere seconds. This 2-in-1 capability makes it a highly versatile tool, perfect for both trimming grass in open areas and creating crisp, clean edges along sidewalks and driveways. This dual functionality not only saves you money by eliminating the need for a separate edger but also streamlines your landscaping tasks, ensuring a professional finish with a single device. Such versatility is a key selling point for homeowners looking for efficient multi-purpose tools.

Ergonomic Design for User Comfort

Comfort during extended use is a significant factor for any garden tool. The BLACK+DECKER LST136 40V MAX 13-inch String Trimmer addresses this with an adjustable height and a soft-grip handle. This ergonomic design allows users to customize the tool to their preferred working posture, reducing strain and fatigue. Whether you’re tall or short, the adjustable features ensure a comfortable grip and optimal control, leading to a more pleasant and productive trimming experience. For more options in lawn care, consider reviewing other models like the BLACK+DECKER LST522 MAX String Trimmer.

How It Compares

Quick Comparison: Alternatives

Products
BLACK+DECKER LST136 40V MAX 13-inch String Trimmer
BLACK+DECKER LST136 40V M…
★ This Review
CRAFTSMAN V20 13-inch Cordless String Trimmer Kit
CRAFTSMAN V20 13-inch Cor…
EGO POWER+ 16" Cordless Weed Trimmer ST1623T
EGO POWER+ 16" Cordless W…
WORX WG163 20V 12" Cordless String Trimmer & Edger
WORX WG163 20V 12" Cordle…
Pros
  • – Powerful 40V motor capable of handling dense weeds and overgrowth.
  • – Convenient automatic line feed eliminates manual bumping.
  • – Easy conversion between trimming and edging functions.
  • – Versatile 2-in-1 trimmer and edger functionality.
  • – Good power for cutting through thick grass.
  • – Lightweight and easy to maneuver for comfortable use.
  • – Auto-feed LINE IQ eliminates bumping.
  • – Fast line reload with POWERLOAD.
  • – Lightweight at 7.5 lbs.
  • – Quick and easy conversion between trimming and edging modes.
  • – Command Feed system provides convenient, on-demand line.
  • – Lightweight construction makes it easy to maneuver and reduces fatigue.
Cons
  • – Some users reported battery failure after a few charge cycles, though customer service rectified it.
  • – Battery life might be insufficient for very large properties without a spare.
  • – May not have the raw power of a high-end gas trimmer for extremely heavy-duty tasks.
  • – Actual battery runtime may be shorter than advertised, especially at high speed.
  • – Can be slightly heavier than some previous models.
  • – Only one battery included.
  • – No variable speed trigger.
  • – Higher price than some competitors.
  • – Battery runtime may vary depending on task intensity.
  • – 12-inch cutting width might be small for very large yards.
  • – Requires purchasing additional spools after included 'free spools for life' offer.
Power Source
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Weight
7.8 pounds
N/A
7.5 pounds
5.5 pounds
In the Box
LST136 40V MAX* Lithium Cordless Trimmer/Edg 40V MAX* High Performance Lithium Ion Battery(1) LBXR36(1) LCS36 40V MAX* Fast Charger(1) AF-100 Spool(1) Guard(1) Auxiliary Handle
N/A
(1) 095” Dual Color Pre-Cut Trimmer Line, (1) 16" Powerload with Line IQ String Trimmer [ST1620T], (1) POWER+ 320W Charger [CH3200], (1) POWER+ 4.0 Amp Hour Battery [BA2242T]
Trimmer, safety guard, flower guard, charger, battery (2) pack, edger wheel, spool, spool caps

Head-to-Head: How Does It Stack Up?

Compared to the CRAFTSMAN V20 13-inch Cordless String Trimmer Kit, the BLACK+DECKER LST136 MAX 13-inch String Trimmer offers a higher 40V MAX battery voltage, potentially delivering more consistent power for tougher tasks than CRAFTSMAN’s 20V system. While the CRAFTSMAN boasts up to 63 minutes of runtime and 52% more power for cutting thick grass, the BLACK+DECKER LST136 MAX 13-inch String Trimmer’s PowerCommand Dial allows for user-controlled optimization between power and runtime, which can be advantageous for varied landscaping needs. For users prioritizing raw power and battery voltage for demanding jobs, the BLACK+DECKER LST136 MAX 13-inch String Trimmer is a strong choice, whereas the CRAFTSMAN might appeal to those seeking a balance of runtime and power within the V20 system.

Against the EGO POWER+ 16″ Cordless Weed Trimmer ST1623T, the BLACK+DECKER LST136 MAX 13-inch String Trimmer maintains a competitive edge in power, but the EGO model stands out with its innovative LINE IQ and POWERLOAD technologies. The EGO’s 16-inch cutting swath is larger than the BLACK+DECKER LST136 MAX 13-inch String Trimmer’s 13-inch, making it more efficient for clearing wider areas. The EGO also features a telescopic carbon fiber shaft for superior adjustability and a high-efficiency brushless motor for increased reliability. If cutting width and advanced line management are paramount, the EGO might be the preferred option, while the BLACK+DECKER LST136 MAX 13-inch String Trimmer remains a robust and reliable choice for general yard maintenance. For those interested in other tools in this category, we have a detailed review of the BLACK+DECKER LCC340C Cordless Trimmer Sweeper Combo.

When matched against the WORX WG163 20V 12″ Cordless String Trimmer & Edger, the BLACK+DECKER LST136 MAX 13-inch String Trimmer again benefits from its higher 40V MAX battery, implying greater power for challenging conditions compared to the WORX’s 20V system. The WORX WG163 offers a slightly smaller 12-inch cutting diameter and features a unique instant line feed system and rubberized wheels for edging precision. While the WORX is a versatile 2-in-1 tool with practical features like a spacer guard, the BLACK+DECKER LST136 MAX 13-inch String Trimmer’s higher voltage and PowerDrive Transmission generally provide more raw cutting strength. The BLACK+DECKER LST136 MAX 13-inch String Trimmer is better suited for users needing more power for heavier tasks, while the WORX is an excellent choice for lighter trimming and precise edging with added convenience features.

Is It Right for You?

Best For

  • Homeowners with small to medium-sized yards needing a powerful cordless string trimmer.
  • Individuals who value easy conversion from trimmer to edger for versatile landscaping.
  • Users seeking a tool with automatic line feeding to minimize interruptions.
  • Those who appreciate adjustable power settings to optimize between runtime and cutting strength.

Consider Something Else If…

  • You have a very large property that requires prolonged runtime beyond a single 40V battery charge.
  • You need a string trimmer with a wider cutting swath (e.g., 16 inches or more) for faster coverage.
  • You prefer a brushless motor for increased reliability and longer lifespan, which is not specified for this model.

Final Verdict

The BLACK+DECKER LST136 40V MAX 13-inch String Trimmer stands out as a highly capable and user-friendly tool for residential lawn maintenance. Its 40V MAX battery and POWERDRIVE Transmission deliver ample power to tackle tough weeds and overgrowth, making it a reliable choice for keeping your yard tidy. The Automatic Feed Spool system and quick trimmer-to-edger conversion significantly enhance convenience, streamlining your landscaping efforts.

While the BLACK+DECKER LST136 MAX 13-inch String Trimmer excels in performance and ease of use, potential drawbacks include the battery runtime, which might necessitate extra batteries for very large properties. Additionally, it might not offer the advanced line technologies or wider cutting swaths found in some premium competitors, which could be a consideration for users with specific needs or extremely demanding tasks.

Overall, the BLACK+DECKER LST136 MAX 13-inch String Trimmer is an excellent mid-range option for homeowners seeking a powerful, versatile, and easy-to-use cordless string trimmer and edger. It provides a solid balance of power, convenience, and ergonomic design, making it a smart investment for those looking to maintain a well-groomed outdoor space without the hassle of cords or gas. Its fast charging capability ensures it’s always ready for action, making it a dependable partner for your lawn care routine.

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Frequently Asked Questions

What is the battery voltage and how long does it take to charge the BLACK+DECKER LST136?

The BLACK+DECKER LST136 is powered by a 40V MAX lithium ion battery. The included fast charger restores full battery power in 2 hours or less, ensuring your grass trimmer is ready for use without significant downtime.

Does the BLACK+DECKER LST136 have an automatic line feed system?

Yes, it features an Automatic Feed Spool (AFS) system. This ensures continuous work without the need for manual bumping, as the trimmer line is supplied as needed, enhancing convenience and efficiency.

Can the BLACK+DECKER LST136 be used as an edger?

Absolutely. The tool is designed for easy conversion from a trimmer to an edger in seconds, providing versatile functionality for various landscaping tasks and allowing you to achieve clean, crisp edges.

What is the cutting speed of the BLACK+DECKER LST136?

The BLACK+DECKER LST136 operates at speeds up to 8500 RPM, providing high-speed performance for efficient cutting. This allows it to tackle tough weeds and overgrowth effectively.

Browse All Models

1
Best Seller

CRAFTSMAN V20 13-inch Cordless String Trimmer Kit

CRAFTSMAN
8.6 /10
GR Score
The GR Score is an independent rating system developed by our editorial team. Scores range from 0 to 10 and are based on data collected across performance, value, reliability, and user feedback - free from any influence by manufacturers or sales partners. Learn more ›
Updated: Sep 25, 2026
Last update on Sep 25, 2026 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API.
Pros & Cons

Pros

  • Versatile 2-in-1 trimmer and edger functionality
  • Good power for cutting through thick grass
  • Lightweight and easy to maneuver for comfortable use
  • Battery powered eliminates gas and cord hassles
  • Adjustable handle for user comfort
  • Great value for the price, especially with included battery and charger

Cons

  • Actual battery runtime may be shorter than advertised, especially at high speed
  • Can be slightly heavier than some previous models
Detailed Review

The CRAFTSMAN V20 String Trimmer and Lawn Edger Kit, model CMCST901M1, is a compelling choice for homeowners seeking a versatile and powerful solution for yard maintenance. This 2-in-1 tool combines a string trimmer and a lawn edger, allowing you to tackle different tasks with a single, convenient device. Powered by the CRAFTSMAN V20 battery system, it offers the freedom of cordless operation, eliminating the need for gas or cumbersome extension cords.

One of the standout features is its performance. With a 13-inch cutting swath and 52% more power compared to older models, it's designed to slice through thick grass and weeds efficiently. The inclusion of two speed settings allows users to prioritize either maximum power for challenging areas or extended runtime for lighter trimming. The Turn-To-Edge functionality makes transitioning from trimming to edging seamless, providing clean and crisp lawn borders.

While the advertised runtime is up to 63 minutes, user reviews indicate that actual battery life can vary, often being shorter when operating at higher speeds or in dense growth. However, many users appreciate the overall power and the convenience of the V20 battery system, especially if they already own other CRAFTSMAN V20 tools. The adjustable handle also contributes to user comfort, making it suitable for various heights and reducing fatigue during longer tasks.

Overall, the CRAFTSMAN V20 String Trimmer and Lawn Edger Kit offers excellent value for its price, especially considering it comes with a 4.0Ah battery and charger. It's a robust and user-friendly tool that effectively handles typical yard trimming and edging needs, making it an ideal choice for small to medium-sized properties. For those needing extended use, an additional battery might be a worthwhile investment.

2
Editor's Pick

BLACK+DECKER LST136 40V MAX 13-inch String Trimmer

8.3 /10
GR Score
The GR Score is an independent rating system developed by our editorial team. Scores range from 0 to 10 and are based on data collected across performance, value, reliability, and user feedback - free from any influence by manufacturers or sales partners. Learn more ›
Updated: Sep 25, 2026
Last update on Sep 25, 2026 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API.
Pros & Cons

Pros

  • Powerful 40V motor capable of handling dense weeds and overgrowth.
  • Convenient automatic line feed eliminates manual bumping.
  • Easy conversion between trimming and edging functions.
  • Adjustable power settings to optimize for task or battery life.
  • Fast charging battery and state of charge indicator keep you working longer.
  • Lighter and quieter than gas-powered alternatives, making it user-friendly.

Cons

  • Some users reported battery failure after a few charge cycles, though customer service rectified it.
  • Battery life might be insufficient for very large properties without a spare.
  • May not have the raw power of a high-end gas trimmer for extremely heavy-duty tasks.
Detailed Review

The BLACK+DECKER LST136 40V MAX 13-inch String Trimmer and Edger is a robust cordless solution designed to simplify yard maintenance for homeowners. Powered by a 40V MAX* lithium-ion battery and featuring POWERDRIVE Transmission, this tool delivers impressive power to cut through tough weeds and overgrown areas efficiently. Its 2-in-1 design allows for quick conversion from a string trimmer to a lawn edger, providing versatility for various landscaping tasks.

One of the standout features is the Automatic Feed Spool (AFS), which ensures a continuous supply of trimmer line without the need for manual bumping, enhancing convenience and maintaining workflow. The PowerCommand Dial is another thoughtful addition, enabling users to switch between maximum power for challenging growth and maximum runtime for longer trimming sessions, adapting to specific needs. With an included fast charger, the battery is ready for action in two hours or less, minimizing downtime.

While many users praise its power and ease of use, especially when compared to older 18V models or gas trimmers, some have noted occasional battery issues. However, customer service has been responsive in addressing these concerns. Its lightweight design and adjustable height, coupled with a soft-grip handle, contribute to comfortable operation, making it accessible even for those who find heavier gas models cumbersome. This trimmer is an excellent choice for suburban lawns, offering a blend of power, convenience, and eco-friendliness.

The LST136 operates at speeds up to 8500 RPM, ensuring clean and efficient cuts. It comes as a complete kit, including the trimmer/edger tool, a 40V MAX* 2.0AH lithium-ion battery, a fast charger, an AF 100 spool, guard, and an auxiliary handle. Backed by a 3-year limited warranty, it offers peace of mind for your investment. For those seeking a dependable, powerful, and easy-to-manage cordless trimmer and edger, the BLACK+DECKER LST136 is a highly recommended option.

3
Limited Time

EGO POWER+ 16" Cordless Weed Trimmer ST1623T

8.3 /10
GR Score
The GR Score is an independent rating system developed by our editorial team. Scores range from 0 to 10 and are based on data collected across performance, value, reliability, and user feedback - free from any influence by manufacturers or sales partners. Learn more ›
Updated: Sep 14, 2026
Last update on Sep 14, 2026 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API.
Pros & Cons

Pros

  • Auto-feed LINE IQ eliminates bumping
  • Fast line reload with POWERLOAD
  • Lightweight at 7.5 lbs
  • Telescopic carbon fiber shaft
  • Long runtime up to 60 minutes

Cons

  • Only one battery included
  • No variable speed trigger
  • Higher price than some competitors
Detailed Review

The EGO POWER+ 16" Cordless Weed Trimmer with Battery and Charger (model ST1623T) is a battery-powered string trimmer designed for homeowners who want professional-grade performance without the hassle of gas or cords. It features EGO's patented LINE IQ technology, which automatically senses and feeds the trimmer line to maintain a consistent 16-inch cutting swath without bumping the head. The trimmer also includes POWERLOAD technology for quick and easy line reloading.

This trimmer is ideal for medium-sized yards and regular lawn maintenance. It delivers up to 60 minutes of runtime on a single charge with the included 4.0Ah battery, and the battery recharges in just 55 minutes with the included charger. The brushless motor provides efficient power with low vibration, and the digital variable speed selector lets you adjust the speed to match the task.

The telescopic carbon fiber shaft is a standout feature, allowing you to adjust the length for comfortable use regardless of your height. The shaft is also stronger than standard trimmer shafts, adding to the tool's durability. The trimmer works with all EGO 56V ARC Lithium batteries, so it integrates seamlessly into the EGO platform.

While the ST1623T offers impressive features and build quality, it comes with only one battery, which may be limiting for larger properties. Additionally, it lacks a variable speed trigger, relying instead on a selector switch. The price is higher than many cordless trimmers, but the combination of LINE IQ, POWERLOAD, and a carbon fiber shaft justifies the investment for those seeking a premium trimming experience.

Overall, the EGO POWER+ ST1623T is an excellent choice for homeowners who value convenience and performance. Its innovative line feeding and reloading systems save time, and the lightweight design reduces fatigue during extended use. If you are looking for a reliable, low-maintenance string trimmer for your yard, this model is well worth considering.

4
Top Rated

WORX WG163 20V 12" Cordless String Trimmer & Edger

8.3 /10
GR Score
The GR Score is an independent rating system developed by our editorial team. Scores range from 0 to 10 and are based on data collected across performance, value, reliability, and user feedback - free from any influence by manufacturers or sales partners. Learn more ›
Updated: Sep 25, 2026
Last update on Sep 25, 2026 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API.
Pros & Cons

Pros

  • Quick and easy conversion between trimming and edging modes.
  • Command Feed system provides convenient, on-demand line.
  • Lightweight construction makes it easy to maneuver and reduces fatigue.
  • Included Power Share batteries offer versatility across WORX tool lineup.
  • Adjustable features like the tilting head and spacer guard enhance usability.

Cons

  • Battery runtime may vary depending on task intensity.
  • 12-inch cutting width might be small for very large yards.
  • Requires purchasing additional spools after included 'free spools for life' offer.
Detailed Review

The WORX WG163 20V 12" 2-in-1 Cordless String Trimmer & Electric Lawn Edger is a practical solution for homeowners seeking to maintain their lawns with ease. This innovative tool seamlessly transitions from a powerful string trimmer to a precise in-line edger in mere seconds, eliminating the need for separate devices and saving valuable storage space and money.

Designed with user convenience in mind, the WG163 boasts a lightweight build at just 5.5 lbs, significantly reducing fatigue during extended use. The Command Feed spool system allows for instant line advancement with a simple push of a button, ensuring uninterrupted work. For those with uneven terrain or hard-to-reach spots, the 90° tilting head provides excellent maneuverability. Additionally, rubberized wheels offer stable guidance for achieving clean, professional-looking edges, while an adjustable spacer guard protects delicate plants and landscaping from accidental damage.

A standout feature of this WORX tool is its inclusion of two powerful 20V Power Share maxLithium batteries. These batteries are not only lightweight but are also interchangeable with any other tool within the extensive WORX Power Share platform, offering exceptional versatility and value. While the 12-inch cutting width is suitable for most residential yards, those with exceptionally large properties might find it takes a bit longer to complete their tasks. Overall, the WORX WG163 is an excellent choice for anyone looking for an efficient, lightweight, and versatile lawn care tool.

5

BLACK+DECKER LST300 20V MAX 12-Inch String Trimmer/Edger

8.2 /10
GR Score
The GR Score is an independent rating system developed by our editorial team. Scores range from 0 to 10 and are based on data collected across performance, value, reliability, and user feedback - free from any influence by manufacturers or sales partners. Learn more ›
Updated: Sep 14, 2026
Last update on Sep 14, 2026 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API.
Pros & Cons

Pros

  • Automatic line feed saves time and effort
  • Lightweight and easy to maneuver
  • Quiet operation compared to gas trimmers
  • Versatile 2-in-1 trimmer and edger functionality
  • Battery and charger included for immediate use

Cons

  • Battery life may be limited for larger yards
  • Not as powerful as some gas models for heavy brush
  • Line can break easily on thick weeds
Detailed Review

The BLACK+DECKER LST300 20V MAX String Trimmer and Edger is a versatile, cordless 2-in-1 tool designed for homeowners who need a reliable solution for trimming grass and edging along sidewalks and driveways. With its PowerDrive transmission, it delivers 6200 RPM for efficient cutting through overgrowth and heavy weeds, making it a solid choice for small to medium-sized yards.

One of its standout features is the Automatic Feed Spool (AFS), which automatically feeds trimmer line as needed without the hassle of bumping the head. This, combined with its lightweight design at just 5.7 pounds and adjustable handle and height positions, ensures comfortable and controlled operation. The 2-in-1 design allows quick conversion from trimmer to edger in seconds, adding to its convenience.

The included 20V MAX lithium-ion battery offers 33% more runtime than previous models, and the charger is wall-mountable for easy storage. The steel deck adds durability, while the quiet operation and lack of gas or oil mess make it an attractive alternative to gas-powered trimmers.

However, the battery life may be limited for larger properties, and it may struggle with very thick brush compared to more powerful gas models. Some users have reported that the trimmer line can break easily on dense weeds.

Overall, the BLACK+DECKER LST300 is an excellent value for homeowners seeking a lightweight, easy-to-use, and quiet cordless trimmer and edger for routine lawn maintenance. Its automatic feed and 2-in-1 versatility make it a top pick in its class.