Model#: BDKNLST136

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Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 120 day money back guarantee
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New or Recon items with possible minor cosmetic damage; CPO 120 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

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
  • 40V MAX Cordless Lithium-Ion High-Performance String Trimmer w/ Power Command - LST136
  • 40V Battery Pack
  • Fast Charger
  • AF-100 Trimmer Spool
  • Trimmer Guard
  • Auxiliary Handle


Series: 40V MAX
Cordless: Yes
Weight: 7.8 lbs.
Batteries Included: 1
Battery Type: Li-Ion
Cutting Width: 13 in.
Drive Shaft Style: Straight
Drive Shaft Type: Fixed Shaft
Handle Type: D-Handle
Line Diameter: 0.065 in.
Line Feed System: Automatic
No-Load Speed (RPM): 0 - 8,500
Speed Settings: 1
Voltage: 40V


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


    4.5 / 5.0
    157 Reviews
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Yes, I would recommend this to a friend (124)
    No, I would not recommend this to a friend (4)
    Lightweight (112)
    Powerful (108)
    Easy To Use (3)
    Ergonomic Design (2)
    Not Durable (1)
    Best Uses
    Frequent Use (1)
    Small Projects (1)
    Yes, I would recommend this to a friend
    Great operation, strong motor, comfortable for extended jobs
    I've been using this trimmmer for a few weeks now for end of the season type jobs.
    So far everything is working very well.
    The straight shaft design is a little uncomfortable for me, I'm 6'2", but the light weight
    design makes up for the shaft 'shortness' a bit.
    Using this trimmer on dead grasses and weeds around the yard along with some final edging, I have been able to zip through everything. The motor seems very strong, quick to spin up and quiet.
    The string operation seems fairly similar to any other trimmer I've used, no complaints.
    Battery life seems to be solid at about an hours worth of 'use', maybe 40% run time in that hour with plenty of full-speed operation and spin-ups that usually drain the battery more quickly.
    November 16, 2015
    Yes, I would recommend this to a friend
    Easy To Use
    Great product
    Great trimmer; performs as advertised. Good battery life, fast charging (buy an extra battery if you're doing big jobs); good for working in garden because of light weight and manuverability.
    May 9, 2012
    Yes, I would recommend this to a friend
    Easy to use, light weight!
    The only draw back is the charge holds 20 minutes of steady use, and takes 6 hours to charge. I can buy a rapid charger and another battery-but with that additional cost I could buy a new gas trimmer. But I love the trimmer no choking on gas fumes, no mixing fuel, or buying plugs and fuel every month. The battery packs are getting better and pretty soon the cost should go down for the rapid charger and additional battery.

    Oh don't forget, buy a 3 pack of spools -line added, it does use a lot of line during heavy use, believe me it,s got some power. Also the thumb safety button will take some getting use to, but you got to have it cause something or someone will pull the power trigger and off it goes-know what mean. I went to sit it down on my porch - accidentally pushing the trigger, nothing happen thank goodness.

    Don't let the cons bring you down cause this is a nice trimmer, for small home or small area, it will get the job done very nicely. It's a smooth operator take my word-I LOVE IT!
    June 20, 2015
    Yes, I would recommend this to a friend
    Better than expected
    I have a fairly large lot. This trimmer is going to save me time and frustration. No more gas can, no more mixing, no more pull start, no more bad gasoline. All of this makes this trimmer worth it. I have used it a few times now and one charge takes care of what I need. I usually keep it at the low setting to trim around the fence in the back. This item looks like new and works like new.
    Yes, I would recommend this to a friend
    B&D 36v String Trimmer
    I use this trimmer to trim and edge about 10,000 sqft of residential yard w/a wooden privacy fence, 3 decks and a A/G pool . It works well, is fairly light compared to the 24v Craftsman I used to use and is easy to maneuver once adjusted correctly. The battery charges fast and I am able to trim a regularly mowed yard on the #1 setting (lowest power) using about half the battery charge. The only complaint I have is that at the lowest speed the line will shorten about half way before feeding out to the full cut.
    July 9, 2013
    Yes, I would recommend this to a friend
    36 volt string trimmer
    I like the feel of this trimmer and particularly the variable speed you can use. Battery life seemed to be adequate for me. At a setting of "1", I got about 45 minutes work out of the battery.
    July 24, 2013
    Yes, I would recommend this to a friend
    love it!
    I've only had my trimmer for 3 weeks and so far I love it! I got tired of replacing my heavy and noisy gas powered trimmers when they broke. This B&D trimmer is very easy to use. My initial concerns about the battery life were unfounded. I have 1/3 acre and use it to trim around trees, fences and and to edge. The first time I used it I was leary of the battery life but had enough power to finish the job when used at the "1" setting. If I had used it under different conditions the battery would probably not have served me as well. The only drawbacks that I've found so far is that the auto feed feature for the line is noisy and that it feeds quite often.
    August 28, 2013
    Yes, I would recommend this to a friend
    Clean, quiet and efficient
    Unit has decent power and battery life if you keep the setting at 1 or 2 on the Richter Scale and keep the job to a modest size area. Best to always have one battery in reserve. In my case, a .23 acre lot with house, front and back yards, no zombie property weed overruns, etc. can be done twice per each 2 hour charge. With no mess of oil, gasoline, carb floods, grease, grime, smell and noise to contend with...not a bad trade off. CPO refurb was A-1; price was about what I would pay in big box store for low end gasoline unit. Am happy camper.
    Yes, I would recommend this to a friend
    Excellent service and excellent product
    The service was excellent. received product in a very timely manner and in excellent shape. I was very pleased with the item. It was clean and no signs of use at all. So far product has lived up to the advertisement and my expectations. I am quite sure that I will be purchasing more recon items from CPO and Black and Decker
    April 16, 2013
    Yes, I would recommend this to a friend
    Finally! Free from gas/oil mix prison!
    Definitely light duty only, edging grass around landscaping. Good battery life if used in this setting. Perfect for the urban jungle, would not recommend for larger country spaces with lots of weeds and tall/thick grass.
    May 13, 2014

    Questions & Answers

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    Browse 16 questions Browse 16 questions and 24 answers
    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.
    How many batteries does it come with?
    clay on Apr 25, 2016
    BEST ANSWER: This will include one battery.
    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,
    Fast Charger,
    AF-100 Trimmer Spool,
    Trimmer Guard,
    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: In Stock Out of Stock
    Warranty: 2 Year Limited 2 Year Limited


    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).