Model#: DEWNDCST920B

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New or Recon items with possible minor cosmetic damage; CPO 120 day money back guarantee
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Dewalt DCST920B 20V MAX Lithium-Ion XR Brushless 13 in. String Trimmer (Bare Tool)

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  • Dewalt DCST920B 20V MAX Lithium-Ion XR Brushless 13 in. String Trimmer (Bare Tool)
  • Note: Battery & Charger sold separately
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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
  • Bare Tool: Battery and Charger Sold Separately
Compliance and Restrictions
warning: Cancer and Birth Defect/Reproductive Harm --


Series: 20V MAX XR
Cordless: Yes
Weight: 8.5 lbs.
Batteries Included: 0
Battery Type: Li-Ion
Cutting Width: 13 in.
Drive Shaft Type: Straight
Line Diameter: 0.080 in.
Line Feed System: Bump Feed
No-Load Speed (RPM): 0 - 6,000
Voltage: 20V



4.5 / 5.0
41 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (30)
No, I would not recommend this to a friend (1)
Powerful (25)
Easy To Use (19)
Lightweight (18)
Value (12)
Heavy (3)
Short Run Time (if applicable) (2)
Uncomfortable to Use (1)
Best Uses
Frequent Use (8)
Small Projects (8)
Large Projects (3)
Heavy Duty Requirements (2)
Great tool
Great tool at a great price!
August 10, 2018
Originally posted at
A new addition to my DeWalt cordless tool collection.
Nice change from the B & D I had been using. More power, better cutting and much longer battery. The batteries work with my drills and circular saw too. Good system.
July 24, 2018
Originally posted at
good power
heavier than my old black and Decker string trimmer but much more powerful.
July 6, 2018
Originally posted at
Great tool! Easy to use!
Very easy to use, no mixing gas, just grab and go! I love it!!
The only thing I noticed that threw me off was the motor ran in reverse compared to my gas trimmer so I had to walk opposite direction when trimming.
June 26, 2018
Originally posted at
DeWalt trimmer is a let down !
Drains battery to fast. String has to be adjusted and replaced a lot. I'm not really pleased with my purchase.
May 24, 2018
Originally posted at
good for small house or job,
need two batteries just in case, has good power, little front heavy not balanced.
May 15, 2018
Originally posted at
Trimmer works great. So nice to have it be battery powered. No carb or gas or cord to worry about. Seems to have a little less power than a gas powered one.
May 6, 2018
Originally posted at
Worked great
Plenty of power and quiet. No gas needed. Light weight.
May 5, 2018
Originally posted at
good product and fast shipping
April 19, 2018
Originally posted at
"Garden Variety" 20volt trimmer
Ive had this one for about 2 years and it is now beginning to fail. The finger controlled variable speed switch is failing, and the trimmer will not trim at full power, except intermittently.
April 13, 2018
Originally posted at

Questions & Answers

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Browse 14 questions Browse 14 questions and 32 answers
Does it use a pre-loaded spool or simply buy separate line?
Sherry B on Jun 15, 2017
BEST ANSWER: Hello, mine came with a bump spool that I would wind on more string when it used up the line on the spool. I replaced the bump head with a Craftsman Hassle Free III Trimmer Line head. If you do that, you will need a nylon bushing from any QP Ace Hardware for about .39 cents.
Are there any optional attachments for the Dewalt 20V trimmer instead of the string line? I love the string, but sometimes would like more.
GEnlew on Sep 1, 2017
Dewalt DCST920B 20V MAX Lithium-Ion XR Brushless 13 in. String Trimmer (Bare Tool)
Dewalt DCST920B 20V MAX Lithium-Ion XR Brushless 13 in. String Trimmer (Bare Tool)
Dewalt DWO1DT802 0.080 in. x 225 ft. String Trimmer Line
Dewalt DWO1DT802 0.080 in. x 225 ft. String Trimmer Line
BEST ANSWER: Unfortunately, attachments are not available for this trimmer
Bare tool means battery not included?
Moyra b on Jun 10, 2017
BEST ANSWER: Yes. The bare tool means there are no batteries. If you already own a dewalt power tool that takes a 20V Max Li-I battery (amps do not matter) then it will be compatible with this.
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: Yes. As long as the battery is 20v and Li-Ion
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.
what is the warranty
Dan on Jul 25, 2016
BEST ANSWER: Dewalt tools comes with a 3 year warranty.

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,
Bare Tool: Battery and Charger Sold Separately
Availability: Out of Stock Out of Stock
Warranty: 3 Year Limited 1 Year Limited