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Model # LST136

Internet # 203072998

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 650 reviewers.
Rated 5.0 out of 5.0 by So easy to use, even my dog can do it! I am a 63 y/o grandmother. I had no problem with the few simple parts that needed assembling. It's lightweight, starts with the click of a switch, and so easy to use even my dog can do it! (see attached photo) June 17, 2015
Rated 5.0 out of 5.0 by Very Good Trimmer Very easy to assemble, couple of minutes. Quick to charge and charge lasts quite a while. I have used it for over an hour and it was still going strong. Easy to rewind spool and the auto feeder works like a charm. Pleased with this Black and Decker Trimmer. July 7, 2015
Rated 5.0 out of 5.0 by GREAT PRODUCT As a widow I've taken on the tasks my husband did. I didn't realize how heavy a gas weed eater is. It is so loud I had no choice but to use ear plugs. Now I know what helped contribute to his hearing loss. After a couple uses I decided to try a battery operated weed eater. I really like how light the B & D is. And it's so easy to start. Just push a button. It's really quiet and the battery lasts a long time. If the battery is to warm when put into the charger it won't charge until it cools down. But in my case that's ok, I'm ready to stop by then. My husband would have to have an extra battery. The charging of the battery goes pretty fast once it starts. May 12, 2015
Rated 4.0 out of 5.0 by More power, no chord to pull, what's not to like? As the caretaker of a luxury vacation rental, I have about 3.5 acres to mow every 5 days. Pulling the chord on a gas-powered string trimmer was aggravating my "tennis" elbow, so much so that I decided to check out cordless models. I'm glad I did. I imagined having to use the gas-powered model for tough going. I was wrong. In fact, the cordless trimmer has way more power. I never need to turn it up past 2 for grass. Almost afraid to crank it up to 6! Plus, the straight shaft gives me much more sweep area. The new trimmer is faster than the old. Best purchase I've made in a long time. No more pulling chords for this caretaker! April 18, 2015
Rated 5.0 out of 5.0 by Works Great - Just as good as gas I had been using gas trimmers and got tired of corded trimmers. I live on a 2.5 acre lot and have not only grass to trim, but also high weeds. This trimmer works as good as the gas powered trimmers on both. The only slight challenge I ran into was sliding the battery onto the unit the very first time. I was being too gentle with it and it did not clip in correctly on the first try, so at first I thought it was not working. BUT upon the 3rd try - I realized the battery was not "clicking into place" because I was not using enough force. Once you get the feel for the force needed to make it click into place, you're good to go! June 2, 2015
Rated 5.0 out of 5.0 by Black and Decker 40 v. string trimmer I am a seventy year old female. I have trouble with trimmer that have a pull cord start and too much property for a corded model. This has six settings which saves on battery like. On one--it lasts more than an hour and I can do a most cutting on one--even heavy grass. It is light weight and vibration free. I love it!! May 5, 2015
Rated 5.0 out of 5.0 by Absolutely Fantastic It took about 5 minutes to assemble the trimmer. It is lightweight and very easy to use (I am a 73 year old woman) and it knocks down the biggest of weeds. The battery lasts at least an hour - as long as I feel like weedeating. I bought the extra batteries so that I could keep going on large projects. The battery easily charges in an hour. For me, this trimmer couldn't meet my needs better. I highly recommend it for light or heavy weedeating and trimming. May 12, 2015
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
  • 2015-09-02T11:29:15.194-05:00
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