BLACK+DECKER 40-Volt Electric Cordless Straight Shaft String Trimmer-LST136 - The Home Depot
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Model # LST136

Internet # 203072998

40-Volt Electric Cordless Straight Shaft String Trimmer

BLACK+DECKER 40-Volt Electric Cordless Straight Shaft String Trimmer

This item has been discontinued.
The Home Depot no longer carries this specific product.

$149.00 / each
  • Features Power Command System to adjust motor power
  • Easily converts from trimmer to edger
  • Highly rated for ease of use (see reviews)


Model # LST136

Internet # 203072998

The BLACK & DECKER LST136 String Trimmer features the 40-Volt Lithium Battery System. BLACK & DECKER electric lawn and garden equipment releases zero emissions in your yard, helping to reduce your carbon footprint. The lithium battery cells hold a charge up to 5x longer when idle and have long life year after year compared to HPB18 BLACK & DECKER Ni-Cad battery packs. This trimmer also features BLACK & DECKER exclusive Power Command System which lets the user adjust the motor power up or down for specific cutting needs. The trimmer also features a lightweight design (7.08 lb.), edger conversion and bump-free use.

  • 40-Volt lithium-ion battery for long runtime
  • Choose max power to tackle thick weeds, max runtime to increase battery life or a combination of both
  • PowerDrive Transmission delivers more power from the motor to the cutting string so you can get the job done faster
  • Automatic feed spool ensures continuous work without bumping and having to stop to adjust the spool
  • Quiet and easy to start, delivering great cutting results without the mess and hassles of gas powered trimmers
  • Easily converts from trimmer to edger with a quick turn of the shaft
  • Total weight of the trimmer with the battery installed is 7.08 lbs.
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Assembled Depth (in.) 
9.623 in 
Assembled Height (in.) 
43.94 in 
Assembled Width (in.) 
4.44 in 
Line style size 
Maximum cutting path diameter (in.) 
Recommended line diameter (in.) 
Shaft length (in.) 
Assembly Required 
Attachment capable 
Batteries Included 
Battery Type Required 
40 Volt Lithium-Ion 
Charger Included 
Engine Cycles 
Electric Motor 
Extra Battery Included 
Head Type 
Wind with Assembly 
Line Advance System 
Metal blade conversion kit 
Multiple heads included 
No-tool line replacement 
Number of Trim Lines 
Product Weight (lb.) 
7.8 lb 
Replaceable Head 
Shaft type 
Shoulder harness/strap 
Start Type 
Trimmer Line Type 
Trimmer Type 
Consumer Electric Cordless String 
Voltage (volts) 
Warranty / Certifications
Manufacturer Warranty 
30 Day Satisfaction Guarantee 3 Year Full Warranty 


Rated 4.6 out of 5 by 465 reviewers.
Rated 5.0 out of 5.0 by light, eco-friendly and efficient trimmer. Tackled our neglected tall weeds and grass with ease. love I don't have to wack it to feed the line. quiet, easy and quick to recharge, no smelly gas engine or electric cord. Very light. Our best weed trimmer ever. July 8, 2014
Rated 5.0 out of 5.0 by This trimmer ROCKS!!! The trimmer was easy to assembled the battery charged quickly and we were off and trimming!! I love how light it is. We love that we can get other products to use like this!! We hope to do just that. My son even says it is easy to use! September 2, 2014
Rated 5.0 out of 5.0 by Excellent Cordless Trimmer! I am very happy with my new B&D 36v string trimmer. Compared to my old 18v B&D the battery last longer and has way more power. I really like the power wheel. Low power for light trimming, higher power for tough jobs. You also don't need to keep battery in the charger like the older type batteries. Once it's charged, it will hold it's charge. I like the power indicator also on the battery. Auto feed works well too. This one is a no brainer. Order one now from Home Depot!!! May 14, 2013
Rated 5.0 out of 5.0 by Great purchase. A real winner! I purchased this trimmer because I was tired of heavy, unbalanced trimers that left my arms aching, and struggling with lengthy extension cords that often became entangled in my wife's flower beds. Nor did I want the noise and maintenance problems of a gas trimmer. This Black and Decker battery-powered string trimmer turned out to be the perfect solution. The overall design of the trimmer is far superior to that of any trimmer I had previously used. It is surprisingly light in weight, and has an adjusable-length shaft long enough for a 6-foot-plus operator to use it without having to bend at the waist. With the battery pack and motor mounted at opposite ends of the shaft, and an adjustable-position mid-shaft handle, a perfect balance can be obtained that greatly reduces arm strain. The features I found especiallly useful are the Power Command dial and the single button release to convert to an edger. Without shifting the position of my hand on the grip, I can rotate the Power Command dial with my thumb (photo) to quickly switch between a lower-power, energy-saving setting while trimming grass to a higher-power setting that cuts readily through thick-stemmed weeds. I love the ease with which the trimer can be converted to an edger by simply pushing a button on the shaft (photo) and rotating the head 90 degrees - no loosening wing nuts or removing screws. Finally, the battery has more than enough power for me to trim grass along 100 feet of flower beds and edge the lawn along 80 feet of sidewalk and curb without stopping to recharge. The Black and Decker 36 volt string trimmer is one of the best purchases of a lawncare power tool I have made. August 18, 2013
Rated 5.0 out of 5.0 by Excellent Product I like the power settings, so that you can run it to conserve power but also have the capability of clearing difficult weeds. I have a half acre of lawn area and there is enough power to do all weeding on one charge. You need to use the lowest power setting to conserve the power but for us this is mostly grass that is easy to cut. November 6, 2012
Rated 5.0 out of 5.0 by Great product, does what it says it will do and more. Great product, charges fast and lasts about 45 minutes on the high setting. The ability to go from low to high is neat because you may not need the high power all of the time. I love this feature. I have a large yard and in the first charge, had everything done, no gas smell, pretty quiet and had charge left over. Downside is that Depot does not carry it in stock at the stores, just the lower volt. This is a great buy, happy. April 25, 2014
Rated 5.0 out of 5.0 by Great Performer So much better with a lithium battery. I was extremely frustrated with our old trimmer with an 18 volt battery that would work for maybe 5 minutes. This was easy to assemble, easy to operate and does a great job with a battery that lasts for my entire yard. Makes me happy! April 21, 2015
Rated 5.0 out of 5.0 by Best battery powered trimmer on the market I received this product as a gift for X-mas in 2013 and I used it for an entire season last year (2014). It performed better than I expected. I've been leery of getting a battery powered weed-whipper because past experience says that battery powered outdoor power equipment just isn't as good as the gas. But I have to say, this one stands up to most gas powered ones that I've used. It has plenty of power with the 40-volt battery and it lasts for about 20-30 minutes of average-powered use. If you turn it up to full power, you'll probably get 10-15 minutes out of one battery. But full power is really unnecessary for most things, unless you're clearing a field. What it boils down to, if you have a house in a subdivision (or similar sized property) then this is the perfect trimmer for you. No messing with gas, no messing with oil, no trouble getting it started. Just pop the battery in and you can do your trimming. I also like the twisting head so you can do your edging. Works pretty well. April 20, 2015
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