40V Lithium High Performance String Trimmer with Power Command


  • Black & Decker’s electric lawn and garden equipment releases zero emissions in your yard, helping to reduce your carbon footprint
  • 40V lithium battery for long runtime
  • Use PowerCommand dial to choose between max power to tackle thick weeds and max runtime to increase battery life
  • The PowerDrive Transmission™ delivers more power from the motor to the cutting string so you can get the job done faster
  • The Automatic Feed Spool™ ensures continuous work without bumping and having to stop to adjust the spool
          4 stars 46 Reviews Print This Page
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Product Details

Key Features

  • Black & Decker’s electric lawn and garden equipment releases zero emissions in your yard
  • 40V lithium battery with built in state of charge
  • Power Command - Choose Max Power or Max Runtime
  • PowerDrive Transmission™
  • Automatic Feed Spool™
  • Fast charger included standard
  • Easily converts from trimmer to edger. tool free handle and height adjutment


  • helping to reduce your carbon footprint
  • For more runtime
  • Customized power or runtime for any yard
  • More cutting power to get the job done faster
  • Line advances automatically. no need to stop and bump

What's Included

  • LST136 40V Lithium Cordless Trimmer/Edger
  • (1) LBXR36 40V High Performance Lithium Ion Battery
  • (1) LCS36 40V Fast Charger
  • (1) AF-100 Spool
  • (1) Guard
  • (1) Auxiliary Handle


  • Trimming areas of overgrowth after mowing
  • Edging along borders, sidewalks and flower beds

Technical Specifications

  • Voltage40
  • rpm6500-8500 rpm
  • Cutting Swath13 "
  • Line Diameter0.065 "
  • Feed SystemAutomatic
  • Replacement AccessoriesAF-100
  • Weight7.8 lbs
  • Power SourceBattery

Please refer to this product's instruction manual for specific warranty information

    In The News

    • Popular Mechanics 2012 Editor’s Choice Award

      The Black & Decker LST136 36V String Trimmer was recognized for its outstanding achievement in new product design and innovation.
      The string trimmer was selected by a team of home editors as one of the best new products at the National Hardware Show on 5/1/12. 
      Popular Mechanics Editor's Choice Award 2012


    Ratings & Reviews

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    User Reviews for

    40V Lithium High Performance String Trimmer with Power Command

    0 people recommended the following review
    chadjadams Wrote:
    So Far so Good
    I just purchased this today. I took it out of the box and put it together in about 5 to 10 minutes. I put the battery in, it displayed 2 out of 5 bars in the battery and it lasted about 15 to 20 minutes on power setting of 3.

    The telescoping handle for easier storage and the power seemed sufficient


    Nothing as of yet, but as I mentioned earlier, I have had it less than 24 hours.

    4/6/2014 11:44:30 PM

    0 people recommended the following review
    J.Smith Wrote:
    Works great... battery not so much
    I believe the trimmer is still good to go, but the 36v battery lasted only about a year before giving up. Note, its an $90 part to replace. For a $180 trimmer, I would have been better off getting a corded/gas trimmer at this cost.

    * Worked great for the year it was in use


    * Battery breaks down after a year * Part costs * Warranty process

    10/27/2013 4:19:43 PM

    0 people recommended the following review
    Jerricho73 Wrote:
    Pass this one by
    Worked absolutely wonderful when it worked. Battery life was more than adequate for my small yard. Worked as a trimmer and edger. Ran it at full power for well over 30 minutes every time I used it. Worked GREAT!

    Long batter life, lightweight, simple to use.


    Lasted 1 season. The motor smoked and burned up a couple of weeks ago. Can't find my Walmart receipt. Contacted B&D for repair options, gave me an address where I could take it or mail it, gave me NO information about whether or not I would need a receipt to send it in. This was a big waste of $150, going back to gas. :(

    10/13/2013 2:58:31 PM

    0 people recommended the following review
    snraek01 Wrote:
    Not impressed
    Bought LST136 last week (09/2013) Charged battery overnight. Got about 15min of trimming when battery died. Ad. says you get a mile of trimming on one charge?????

    Light quiet


    Need at least 2 batteries for a small yard

    9/15/2013 12:37:23 PM

    0 people recommended the following review
    W.S. Wrote:
    Cheap internal part caused big problems.
    Bought this back in Dec. 2012. Went dead Aug. 2013. It turns out that this trimmer uses a cheap plastic gear (part #19). This slowly started to wear down and caused the trimmer to skip rotations. As the gear wore down, it created plastic shavings inside, and while still able to spin, created heat that eventually melted and fused the gear to the plastic motor housing assembly (part #14); becoming locked up and unusable. Will see if B&D send the two replacement parts.....

    Light weight. Quick battery re-charge.


    Quick battery discharge. Cheap plastic (inside and outside).

    8/22/2013 3:21:08 AM

    0 people recommended the following review
    roadrunner1402n Wrote:
    A waste of money and time
    I purchased my trimer in May 2013. I am now on my 3rd battery and second unit. Our yard is not very large and a fully charged battery won't last through one session of trimming. I don't ever run it on high speed as it uses up the power faster. Also the string autofeed is very poor. I feel I have wasted my money for this unit and I won't buy another Black & Decker trimmer. I might add that I don't understand how this product could have a 4 star rating with so many negative comments.



    The battery and the string feed are crap. Lets see....whats that leave? It leaves the Black & Decker 36V trimmer in the garage and I get out my Stihl gas trimmer that I know will get the job done. It may be heavier but at least I can depend on it!

    8/15/2013 10:41:22 AM

    0 people recommended the following review
    womanrunningfarm Wrote:
    disappointed in battery life
    I was so excited to have a trimmer that I could handle as I do all the yard work. From the little time I have used this product I think it has the good potential in doing what my trimming. But I can only get about a 1/2 hour of use b4 the battery goes dead.

    light weight - easy to use


    Bad battery had to charge 4 times now and haven't even went through a spool of string :(

    7/16/2013 11:18:49 AM

    0 people recommended the following review
    Jcool821 Wrote:
    Plenty of power
    Have used it three times, am very impressed with the power and how easy it is to use

    I like the way you can dial up the power


    am somewhat concered about the battery. Reviews have not been real great and I am hopeing that I don't have to buy another one, I agree with what most people say that for what this trimmer cost it should come with a second battery

    7/8/2013 11:30:39 PM

    0 people recommended the following review
    sle123 Wrote:
    easy to handle, battery life stinks, doesn't last that long
    easy to use, hate the safety hold

    easy to use


    safety hold, the battery doesn't lasts that long, 5 minutes and it's ready to charge all over again

    6/8/2013 9:53:50 PM

    0 people recommended the following review
    OrthoPA Wrote:
    Miss my 18V Black and Decker Trimmer
    Upgraded last year to the LST136 trimmer due to all the good reviews. My 18V Black and Decker worked fine, but needed 2 battery changes to get through the yard. When my son needed a trimmer I quickly used the excuse to upgrade.

    Lighter than my 18V model


    Still couldn't do complete yard with one battery included. Maybe used 5 times last season. Went to use and battery indicator dead. Threw in the charger and got the flashing red light. Have 18V batteries that are still running strong after 5 years of hard use and the supposed top of the line can't make it one light season of use before needing to be replaced. Replacement price is ridiculous. Website info is horrible, so have no idea if there is any warranty with the battery. Will look for replacement on ebay. Hope this isn't worst Black and Decker purchase I've ever made. Would not recommend buying this product.

    6/5/2013 10:47:13 PM

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