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Model#: DEWNDCST920B

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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 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

Dewalt DCST920B 20V MAX Lithium-Ion XR Brushless 13 in. String Trimmer (Tool Only)

  • Note: Battery & Charger sold separately
New $129.00
Recon $119.99
Sale Price:
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(continental U.S.)
In Stock Delivered by Wed., Aug.21

Frequently Bought Together

Product Overview


The DCST920B 20V MAX Lithium-Ion XR Brushless 13 in. String Trimmer provides precise power control with a variable speed trigger as well as performance and run time management with the Hi/Lo speed control switch. The patented gear drive design will provide more torque and maintain cut speed under load, while the dual-line bump feed head clears a full 13 inches. Well balanced and only 8.5 lbs. with a 20V MAX 5.0 Ah Lithium-Ion battery, the string trimmer easy to maneuver and puts less stress on the user.
  • 13 in. cutting swath
  • Brushless Motor maximizing motor efficiency and durability
  • Dual 0.080 in. line with bump feed
  • Lightweight and ergonomic design
  • Variable speed trigger and speed control
  • Patented gear drive design
  • 20V MAX Lithium-Ion XR Brushless 13 in. String Trimmer - DCST920
  • Auxiliary Handle
  • Guard
  • 0.080 in. Line Pre-wound Spool
  • Tool Only: Battery and Charger Sold Separately
Compliance and Restrictions
warning: Cancer and Reproductive Harm --


Series: 20V MAX XR
Cordless: Yes
Length: 35.63 in.
Width: 12.5 in.
Height: 10.75 in.
Weight: 7.3 lbs.
Batteries Included: 0
Battery System: 20V MAX
Battery Type: Li-Ion
Blade Construction: String
Bluetooth Compatibility: No
CSA Safety: No
Case Included: No
Charger Included: No
ETL Safety: No
Motor Type: Brushless
Powered Tool Power Source: Electric - Cordless
Speed Settings: 2
Starter Type: Electric
UL Safety: No
Voltage: 20V
Wifi compatibility: No



4.6 / 5.0
51 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (23)
No, I would not recommend this to a friend (2)
Powerful (20)
Lightweight (16)
Easy To Use (12)
Value (6)
Heavy (3)
Lack of Power (3)
Uncomfortable to Use (3)
Short Run Time (if applicable) (2)
Best Uses
Small Projects (8)
Frequent Use (7)
Large Projects (4)
Home Repair (1)
13in string trimmer
i was surprised to see how well that trimmer works . satisfied with my perches
June 26, 2019
Describe Yourself:
Avid Do-it-Yourselfer
Great light trimmer. Works perfect and battery lasts quite a while.
June 25, 2019
Typically dewalt
Works like a gas weedeater.
June 1, 2019
Rugged and reliable.
I’m a contractor and rely on Dewalt 20v tools every day. The string trimmer is a great value for the money. 5ah battery did well. Pretty good for edging even tho the manual says that’s a no no.
May 28, 2019
Less fussing around to get the job done.
Outstanding. Love the freedom of no cord or gas and oil mixing. Have owned both of the previous ones. Like how comfortable it is to use.
May 27, 2019
Amazing tool!!!
Amazing,light weight, plenty power!! Just like all my other dewalt tools!! Chain saw, hedge trimmer, blower and drills!!! No more gas or electric tools for me!!! Sold on 20V Dewalt!!!
User submitted image
Added Apr 19, 2019
April 13, 2019
I am small at only 115 pounds and can not use a gas trimmer - the length takes getting used to as I am only 5 feet tall but if I can use anyone can
April 3, 2019
Great value for a light duty weedeater.
Great value. I was done with fighting 2stroke motors. I'm a homeowner with only a little weedeating from time to time. This 20v is strong enough. The run time is about 20-30 min. The value of reconditioned tools sold by CPO is outstanding.
March 31, 2019
Good trimmer for not being gas powered.
March 31, 2019
Snow whacker
I live in Minnesota and we still have snow on the ground so haven't been able to use it on the grass yet but it sure chewed the bejeepers out of a cardboard box and a snow bank
March 22, 2019

Questions & Answers

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Browse 12 questions Browse 12 questions and 18 answers
Do you have a trimmer with a blade instead of string?
D H on Apr 7, 2018
I have a recent model DeWalt cordless drill with 20V battery pack. It doesn't say 5A on the battery I have. Will it fit and power this tool? If so, will it work for decent amount of time? I have a very small yard.
ChillyWilly on Jun 2, 2016
BEST ANSWER: Dewalt has many different batteries available for their 20 volt Max Cordless Tools. Look on the bottom of the battery to verify which amp one you have. To my knowledge they have a 1.3AH, 1.5AH (small black), 2AH (small yellow), 3AH (large black), 4AH (large yellow), 5AH (large yellow with a 5 on side), and Dewalt is coming out with a 6AH or its already available to order online called FlexVolt (I didn't see it at the Home Depot I went to) and I heard from the Dewalt rep. that they are even releasing a 9AH battery later on. All of these batteries will power any of the Dewalt tools, however on certain tools such as the brushless 16 gauge finish nailer it is a better weight and balance to use the smaller batteries. For the Drills I like the smaller 2AH batteries unless you need longer runtime. For any of the bigger more demanding tools it really makes a difference to use the 5AH ones. Hope this helps it can get a little confusing compared to Dewalt 18 volt batteries and tools.
How long can it run while ime trimming until I would recharge it again and does it have other attachment?
Bob rock on Jul 30, 2016
BEST ANSWER: That depends on the battery used. Dewalt offers (5) 20v batteries that vary in Amp Hours. To acquire the longest run time, we would recommend purchasing the 5 amp hr battery (model DCB205) that could extend your run period for 60-65 minutes depending on how it's used.
Will regular 18v batteries work with this tool or do they have to be 20v lithium ion?
Shawn on Jul 18, 2016
BEST ANSWER: no, the battery has to be 20V to work with the tool
Can you also reference the battery and charger that goes with this item? I would need to purchase those separately correct?
donna on Jun 7, 2016
BEST ANSWER: Home Depot has a kit with the trimmer "Tool" , charger and one 5AH Battery for $199.99 I just picked it up along with a few others. I am not sure if the deal they had is still going on but they offered an additional 3AH Battery for free with the Trimmer Kit I bought there. I highly recommend this trimmer from Dewalt; the ability to walk around the yard without a cord attached and without having to deal with a gas powered engine and still obtain this amount of power really makes the chore of trimming your lawn kind of fun. Buy one you won't be disappointed, and Definitely try to use the 5AH Batteries over the lower amp ones, This greatly improves the run time & performance of this tool.
Will the 20 v battery used to power other tools work in the weedeater
Julie on May 6, 2016
BEST ANSWER: The battery can be used with any compatible 20v Max unit.
Will it wok with a 40V or even the 60V battery?
A shopper on Aug 9, 2018
BEST ANSWER: No only 20 volt battery’s
How long will the battery last,?
Tom V on Jul 15, 2018
BEST ANSWER: About 30 Minutes
what is the nut size of the head?
harry b on Jun 24, 2018
BEST ANSWER: The nut size is 1/2”
what is the warranty
Dan on Jul 25, 2016
BEST ANSWER: Dewalt tools comes with a 3 year warranty.
How do you change the weed eater string?
A shopper on Jul 25, 2018

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: 20V MAX Lithium-Ion XR Brushless 13 in. String Trimmer - DCST920,
Auxiliary Handle,
0.080 in. Line Pre-wound Spool,
Tool Only: Battery and Charger Sold Separately
Availability: In Stock In Stock
Warranty: 3 Year 1 Year
Price: $129.00 $119.99
You Save: N/A $9.01 (7%)


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).