Model#: BDKNLST136

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New items with possible minor cosmetic damage; CPO 120 day money back guarantee
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Black & Decker LST136 40V MAX Cordless Lithium-Ion High-Performance 13 in. String Trimmer with Power Command

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  • Due to federal regulations, this product can only be shipped within the continental US. Express delivery not available.

Product Overview


NOTICE: Black & Decker has recently updated this model from the 36V battery standard to the 40V battery standard. If you are looking for the 36V version, please search for the model listed in the "Replaces" specification in the list to the right.
Black & Decker's electric lawn and garden equipment release zero emissions in your yard and provide a clean running unit that helps reduce your carbon footprint. Hassle-free electric starting system and a long lasting rechargeable 40V battery deliver the performance of a gas powered mower without the tedious recoil starting and messy oils.
Powered by the new 40V MAX Lithium-Ion technology, Black & Decker's LST136 High-Performance String Trimmer delivers reliable trimming and edging performance without the hassle of cords and gas. Featuring the versatile Power Command dial, the LST136 allows users to choose the level of power they need to take on the task at hand. Select from Max Power to Max Runtime to more efficiently manage the battery life and trimming power needed.
Note: 40V MAX tools are backwards compatible with 36V Lithium-Ion battery packs.
  • Automatic Feed Spool (AFS) keeps trimmer line fed during operation - no bumping required
  • Power Command dial with power selection ranging from Max Runtime to Max Power for precise power management
  • Easily converts to a basic edger with tool-free handle and height adjustment
  • Exclusive PowerDrive transmission delivers improved cutting capacity and performance
  • Powerful Lithium-Ion technology provides longer run times to complete even the toughest jobs
  • Fast Charger included - charges battery in 2 hours or less
  • Easily converts from trimmer to edger in seconds
  • Maximum initial battery voltage (measured without a workload) is 40 volts. Nominal voltage is 36.
  • 40V MAX Cordless Lithium-Ion High-Performance String Trimmer w/ Power Command - LST136
  • 40V Battery Pack - LBXR36
  • Fast Charger-LCS36
  • AF-100 Spool
  • Guard
  • Auxiliary Handle
Compliance and Restrictions
warning: Cancer and Reproductive Harm --


Cordless: Yes
Length: 9.62 in.
Width: 4.44 in.
Height: 43.94 in.
Weight: 7.8 lbs.
Batteries Included: 1
Battery Amp Hour: 2.4 Ah
Battery System: 40V MAX
Battery Type: Li-Ion
Battery Warranty: 2 Year
Blade Style: Single Action
Bluetooth Compatibility: No
CSA Safety: No
Case Included: No
Charger Included: Yes
ETL Safety: No
Handle Type: D
Motor Type: Brushed
No-Load Speed (SPM): 6500-8500
Power Source: Cordless
Speed Settings: Variable
Starter Type: Electric
UL Safety: No
Voltage: 40V
Wifi compatibility: No


  • Lawn & Garden Maintenance
  • Grass Trimming & Edging
  • Recommendations


    4.5 / 5.0
    167 Reviews
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Star
    Yes, I would recommend this to a friend (127)
    No, I would not recommend this to a friend (4)
    Lightweight (114)
    Powerful (110)
    Easy To Use (6)
    Battery Longevity (if applicable) (4)
    Not Durable (1)
    Best Uses
    Frequent Use (4)
    Small Projects (2)
    Heavy Duty Requirements (1)
    Large Projects (1)
    Would you recommend this product?
    Easy To Use
    Ergonomic Design
    Battery Longevity (if applicable)
    Best Uses
    Frequent Use
    Small Projects
    new weedwacker
    I have an older Black and Decker 18v Nicad trimmer, which has always been great, but this thing is phenomenal! Way more powerful and longer lasting. I love it!
    September 20, 2019
    2 months ago
    Describe Yourself:
    Beginner- Casual Do-it-Yourselfer
    August 27, 2019
    Would you recommend this product?
    Easy To Use
    Best Uses
    Frequent Use
    It's a great buy.
    This thing works perfect.
    July 21, 2019
    4 months ago
    Describe Yourself:
    Avid Do-it-Yourselfer
    So Far so Good
    I have only used my new 40 volt grass trimmer a few times but I do like the light weight and it seems to have good longevity. I hope it continues to please me for years to come.
    September 23, 2018
    So good, after the 1st, I bought a 2nd one
    SICK of gas trimmers, HEAVY, a mess to mix fuel, I bought one of these and a extra battery, then latter one of the fast chargers, I was SO PLEASED, I purchased another for our out of state property where I would not have to transport the trimmer. I trim 3.5 acres, many trees, & 4 buildings, TOTALLY SATISFIED, I >>DO<< wish I could fit one of those heads where you can feed short pre cut lines into it.
    August 22, 2018
    Originally posted at
    great trimmer
    I have had this trimmer for 2 years and it works great trimming along the driveway, walks and around the shrubs. IT works so well that I just purchased a LHT2436 hedge trimmer. Hopefully it works just like the string trimmer. Both are well worth the cost and now I have 2 batteries.
    July 3, 2018
    Originally posted at
    I was very surprised by the easiness to work. Best of all was the automatic line feeder.
    June 6, 2018
    String trimmer
    I like how easily adjustable this is, and it can be used right or left handed.
    May 26, 2018
    good product!...
    I've always used Black & Decker products...affordability, quality for the price range, durability,...and lol...I like the, this particular weedeater is about what I needef...not too powerful so as to damage fruit tree bases and flower beds, but powerful enough to eliminate weeds that have been kept up..Would not be strong enough for a year's weed growth..
    May 8, 2018
    Would you recommend this product?
    Easy To Use
    Ergonomic Design
    Battery Longevity (if applicable)
    Good, lightweigt tool
    I needed something that didn't have a heavy, loud gasoline motor to pull start. I bought this unit and I am happy with it. It is powerful enough to trim my entire lawn area with one charge.
    November 9, 2017
    over 2 years ago
    Describe Yourself:
    Avid Do-it-Yourselfer

    Questions & Answers

    Start typing your question and we'll check if it was already asked and answered. Learn More
    Browse 17 questions Browse 17 questions and 24 answers
    How many batteries does it come with?
    clay on Apr 25, 2016
    BEST ANSWER: This will include one battery.
    does anyone else have a problem with the line feeding too much and wasting line?
    troy f on Jun 11, 2017
    BEST ANSWER: Been using for 2 months and it has not been a problem! Also, my MIL has been using the same one for 2 years and has not had a problem.
    How long is it?
    Gary on May 11, 2016
    BEST ANSWER: The length of the string trimmer is 43.94 in.
    Where can I find a lithium 40v battery for my blacker and weeder?
    Carita D on Sep 28, 2016
    BEST ANSWER: The battery you are looking for is a BDKNLBX1540. CPO does carry this item.
    Does the listed price include the charger? What is its price and that of extra spools?
    Manny on Jul 1, 2016
    BEST ANSWER: Yes, the bdknlst136 includes a charger. Spools would be model AF-100-3ZP
    Bought this one (or two) years ago and it's been fine. Used it last weekend, recharged the battery and now it won't start at all. Battery shows a full charge. Trigger mechanism, everything else seems fine. Any suggestions?
    Wanna-be Handy-Man on Jun 21, 2016
    BEST ANSWER: Please contact Black and Decker directly at 800-544-6986 for technical assistance
    I have a very good quality metal fence and haven't been able to find a trimmer that will work on my metal fence. Will the B&D 40V Lithium String Trimmer work (trim) on my metal fence?
    Vicki on Jun 10, 2016
    BEST ANSWER: We would recommend a trimmer that will accept a thicker line of string (i.e .080 to .0130).

    Use the link below to view an example of one:,default,pd.html?start=3&q=dewalt%20trimmer
    Why does it run for a minute and the stop by itself?
    Randall on May 16, 2016
    BEST ANSWER: This item is not suppose stop by itself. Please contact CPo for support.
    Is the new 40 volt edger /trimmer with the new battery
    /heavier than the old 36 volt trimmer/ edger with the 36 volt battery
    Old and tired. on Apr 28, 2016
    BEST ANSWER: Looking a 2 pound difference
    Bob on Mar 12, 2015
    BEST ANSWER: Your question will be best answered by the manufacturer, who can more accurately provide technical support. Please call Black and Decker directly at 800-544-6986. You can also reach them at

    New Vs. Reconditioned

    What's the difference between New and Factory-Reconditioned?

    Factory-Reconditioned products have been returned to the manufacturer and are restored to like-new operating condition; they go through a rigorous testing and inspection process. Plus, they offer a significant savings vs. new.
    • Reconditioned products may have minor cosmetic blemishes or scratches that do not affect item performance.
    • Reconditioned products may not come with all of the consumables the new version comes with (bits, sanding pads/papers, cases, etc.).
    • Both come with a manufacturer warranty and are covered by our Money Back Guarantee; New is 30 days, Reconditioned is 120 days.
    Condition: New Factory Reconditioned
    Features: Same Same
    Specs: Same Same
    Includes: 40V MAX Cordless Lithium-Ion High-Performance String Trimmer w/ Power Command - LST136,
    40V Battery Pack - LBXR36,
    Fast Charger-LCS36,
    AF-100 Spool,
    Auxiliary Handle
    40V Cordless Lithium-Ion 13 in. Straight Shaft Electric String Trimmer - LST136R,
    40V High Performance Lithium-Ion Battery - LBXR36,
    40V Fast Charger - 9061950N,
    Auxiliary Handle
    Availability: Out of Stock Out of Stock
    Warranty: 3 Year 1 Year


    Warranty Information

    Black & Decker Lawn & Garden Electric Tools

    Warranted for two (2) years from date of purchase. This warranty does not cover damage resulting from negligent handling, misuse or lack of reasonable maintenance and care. (Proof of purchase maybe required).