Model#: BDKNLST140C

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Black & Decker LST140C 40V MAX String Trimmer

  • Black & Decker LST140C 40V MAX String Trimmer
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  • Due to federal regulations, this product can only be shipped within the continental US. Express delivery not available.


Trim tough overgrowth, and define crisp edges after mowing with this 40V MAX trimmer/edger. It features a state of charge indicator that displays how much power you have left at all times. It speeds your work by feeding trimmer line without bumping, and by quickly converting from trimmer to edger.
  • 40V MAX lithium ion battery with state of charge indicator to show battery charge level.
  • Adjustable height for ideal user comfort
  • Easily converts from trimmer to edger
  • Automatically feeds trimmer line with no bumping required
  • LST140 40V MAX Cordless Trimmer/Edger
  • (1) LBX154040V MAX Lithium Ion Battery
  • (1) Charger
  • (1) AFS Spool
  • (1) Guard
  • (1) AUX Handle
Compliance and Restrictions
warning: Cancer and Reproductive Harm --


Series: 40V MAX
Cordless: Yes
Length: 40.75 in.
Width: 4.63 in.
Height: 9.63 in.
Weight: 8.8 lbs.
Batteries Included: 1
Battery Amp Hour: 1.5 Ah
Battery System: 40V MAX
Battery Type: Li-Ion
Blade Construction: String
Bluetooth Compatibility: No
CSA Safety: No
Case Included: No
Charger Included: Yes
ETL Safety: No
Motor Type: Brushed
Power Source: Electric - Cordless
Speed Settings: Variable
Starter Type: Electric
UL Safety: Yes
Voltage: 40V
Wifi compatibility: No



4.4 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
No, I would not recommend this to a friend (1)
Easy To Use (1)
Lightweight (1)
Short Run Time (if applicable) (1)
Best Uses
Small Projects (1)
No, I would not recommend this to a friend
Easy To Use
Short Run Time (if applicable)
Best Uses
Small Projects
Less quality
It’s lighter weight makes seems less well made than previous model. Also battery life is shorter than 2.0 & 2.4. The method to go from edger to trimmer isn’t nearly as good as other models.
August 24, 2019
2 months ago
Describe Yourself:
Avid Do-it-Yourselfer
40 volt trimmer
We loved our trimmer it is light weight, but now the gears are not meeting and it isn’t working. We’ve had it a little over a year and it was purchased new.
September 9, 2018
Originally posted at
Easy on my back
Lightweight and easy carry half acre yard. Great price
July 21, 2018
Originally posted at
Wonderful gardening tool!
I live this for trimming without having to pull out the gas powered trimmer. We have a large lot with a pond and lots of beds. This edger is perfect for trimming around the pond and beds. It has plenty of power for thicker growth and is easy to use and control. Had a less powerful Black and Decker for years and this is much more versatile. Cannot beat it for the price.
June 11, 2018
One of the Best Cordless String Trimmers Should...
it be your first purchase for gearing up and getting the job done in your yard!

For a long time I had a to connect my trimmer to wire cords and I could never get my yard tasks completed because of the entire area I had to cover - too many feet to trim aand mu cords could never reach the end of the terrain. It was too much punishment seeing my neighbours with their cordless trimmers on hot summer days, breezing through their yardwork in a half the time it took me.

The BIG plus about this Black & Decker trimmer is the lithium 40v battery with charge indicator; fast charging, lightweight, and non pollutant (compared to gas controlled string trimmers and an excellent BONUS feature is the spool's automatic line feed. Easy, fast charging lithium battery(ies) that easily operate(s) for hours on just one charge.

There are many advantages to this excellent tool - it is a trimmer AND can be used as an edger as well! I truly recommend this highly productive B&D 40V Lithium Trimmer for all who are prepared to have an easy & cool summer!
June 4, 2018
Originally posted at
Great Power Tool
I have had this string trimmer for about a year and love it. The 40 volt battery is great. It lets me do the whole yard before a recharge. I do have to recharge it to edge trim my sidewalk but I let it go so there is a lot to trim but it handles it.
June 1, 2018
Originally posted at
Lightweight / Easy to Maneuver!
I've always had Great Experiences with Black & Decker Equipment...
May 14, 2018
Originally posted at

Questions & Answers

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Browse 2 questions Browse 2 questions and 3 answers
how long does battery last ?
A shopper on Apr 26, 2019
BEST ANSWER: The battery should last up to thirty minutes to one hour.
If ordered today, when could we expectvdeluvery?
John D on Oct 11, 2019
BEST ANSWER: Please contact our Sales Department at 1-866-577-3014 ext. 27396. The agent will need the shipping information to provide you with the best E.T.A.