Model#: DEWNDCST920P1

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Brand new items;Full manufacturer warranty available
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New or Recon 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 DCST920P1 20V MAX 5.0 Ah Cordless Lithium-Ion Brushless String Trimmer

New $207.99
Recon $139.99
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  • Due to federal regulations, this product can only be shipped within the continental US. Express delivery not available.

Product Overview


The DCST920P1 20V MAX 5.0 Ah Cordless Lithium-Ion Brushless String Trimmer is part of Dewalt's outdoor line of products that are fueled by powerful motors providing the runtime and performance that landscapers demand without dealing with the nuances of gas powered products.
  • 13 in. cut swath get rids of grass and weeds quickly
  • Lightweight and compact design minimizes fatigue
  • Variable trigger with two speed control ranges between 0 - 4,000 and 0 - 6,000 RPM allowing you to choose the proper speed to match your trimming task
  • Dual 0.080 in. line with bump feed
  • 20V MAX Cordless Lithium-Ion Brushless String Trimmer - DCST920P1
  • 20V MAX 5.0 Ah Lithium-Ion Battery - DCB205
  • 20V MAX Lithium-Ion Battery Charger
  • Auxiliary Handle and Guard
  • 0.080 in. Line Pre-wound in Spool


Series: 20V MAX
Cordless: Yes
Weight: 8.5 lbs.
Batteries Included: 1
Battery Amp Hours: 5.0 Ah
Battery Type: Li-Ion
Cutting Width: 13 in.
Drive Shaft Style: Straight
Drive Shaft Type: Fixed Shaft
Handle Type: Wrap-Around
Line Diameter: 0.080 in.
Line Feed System: Semi-Automatic
No-Load Speed (RPM): 0 - 6,000
Speed Settings: 2
Voltage: 20V



4.7 / 5.0
64 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Yes, I would recommend this to a friend (55)
Powerful (42)
Lightweight (41)
Easy To Use (17)
Value (9)
Short Run Time (if applicable) (3)
Uncomfortable to Use (2)
Lack of Power (1)
Best Uses
Frequent Use (12)
Small Projects (8)
Large Projects (1)
Home Repair (1)
Yes, I would recommend this to a friend
Really good trimmer, but design flaw gets it very dirty
I am VERY impressed with this trimmer. It works even better than I expected it to. And I was using it for some serious weed destruction. For everyday trimming needs, it will be SUPERB. The battery life is excellent. I was getting a good 30 mins on a 5ah battery going full throttle, high-speed pretty much non-stop.

The only problem I have with it is the motor is mounted at the bottom of the shaft which means it gets tons of debris thrown on to it. The little mesh guard seems to keep stuff away from the motor, but the guard itself gets completely clogged. And the design of the guard makes it almost impossible to clean. We're talking getting out tweezers to pull grass out of the guard. I found I can put one of my boy's socks over the head and keep the grass from getting in.
August 4, 2015
Yes, I would recommend this to a friend
Great Trimmer! Perfect for me because I don't want to deal with gas anymore! It's a little less powerful than my gas trimmer but it's not a problem at all for trimming my lawn. The battery will last about 10-15 minutes of constant trimming which is fine for my purposes. The obvious pro of electric is that there is no mixing gas or pulling chords; which is why I bought this product in the first place.
June 11, 2015
Great Trimmer "Thanks Dewalt"
I have a corner lot with a lot of trimming to do, i already own 2(2amp hour), 2(4amp hour) batteries so purchasing this trimmer was a no brainer. It runs great, Hi speed is perfect for tough jobs along with the lightweight and strong construction I would recommend this trimmer. If you buy this trimmer I would recommend at least buying another battery. Also, the dual line is tough and complements the power of this trimmer very well.
May 1, 2015
Originally posted at
Yes, I would recommend this to a friend
great trimmer
goes with the other 20V MAX tools I have. uses same charger and battery.
December 9, 2015
Yes, I would recommend this to a friend
Nicely put together
I am a former DeWalt employee, so putting product loyalty aside, I love this tool!
It does everything I need it to do. Edging takes some getting use to, but once I got the hang of it it worked great.
It does seem to use too much line, but I think that was more me getting use to it.
Very happy, especially since I am so heavily invested in the 20v tool line already.
August 11, 2015
Yes, I would recommend this to a friend
Easy To Use
Ergonomic Design
Battery Longevity (if applicable)
Best Uses
Frequent Use
dewalt string trimmer
I'm well satisfied with the trimmer, it runs a long time on a charge and is easy to use.If the battery don't last like you think it should you're probably using it like a brushcutter.I also like the fact that i can interchange batteries with my other dewalt power tools I was hoping for a pre-wound replacement spool but a spool last a long time. This trimmer was recomended by a friend and likewise i would also give it good review
July 16, 2017
7 months ago
Describe Yourself:
Avid Do-it-Yourselfer
great tool
I am impressed with the overall performance. would love too have a bigger guard.pretty much covered when done.other than that another well built tool.
June 14, 2015
Originally posted at
Fast delivery. Great product. I highly recommend. I have an average size yard and I can use this twice before I need to charge the battery. Very happy with this
August 3, 2017
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Frequent Use
It arrived quickly, only had a chance to use it once so this is an early review seems well-balanced seems very powerful to undergo the task that I expect from it. What I think I'll like best about it, is you do not have to worry about having gas for your normal gas trimmers just place the battery in,turn it on and go.
July 1, 2017
8 months ago
Yes, I would recommend this to a friend
VERY nice trimmer!
Overall an excellent trimmer, high density battery helps a lot. Huge improvement over my word cordless trimmer.
June 8, 2015

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 16 questions Browse 16 questions and 21 answers
Does it come with a 20 volt battery and charger?
Daniel P on Jun 25, 2017
BEST ANSWER: yes, it comes with both a battery and charger. I.e. everything you need to start using it when it arrives.
How long is the 20V MAX 5.0Ah Cordless Lithium-Ion Brushless String Trimmer?
JBo on Jan 15, 2016
BEST ANSWER: Yes from end to end when ready for use the length is 67-15/16". With battery off the unit is 66" long. This was done putting the rotating hub on a hard surface and measuring from that surface vertically to the end. Should be +/-1/8" or better accuracy.
Matt O'Brien
VICTOR ENGINEERING / O'Brien Concept and Solution
9316 Davenport St.
Omaha, NE 68114
Will the new flex volt battery make it stronger and run longer?
A shopper on Jul 7, 2017
BEST ANSWER: Yes , it will increase the run time dramatically; it will not necessarily make it that much stronger; the flex volt battery will just deliver a more consistent output to the motor for a longer period of time; in other words the trimmer with a fresh charged 5.0 Ahr batt will have the same cutting power that a flexvolt would have after 30 minutes of use; the bigger flex volt batt just increases run time.
Will it work with impact battery?
A shopper on May 21, 2017
BEST ANSWER: Yes , it will work with any of the DEWALT 20v batteries including the new Flex volt battery.
Just got the Dewalt 20v MAX 5 Ah String it! Although I was wondering If I can use my other 20v MAX 3 Ah batteries I use with my Dewalt Drill and Skill Saw without harming the battery?
Jamey T on Apr 26, 2017
BEST ANSWER: Yes I think it is fine to use it. It just won't last as long when you use it.
Is the battery new or reconditioned when purchasing the reconditioned tool?
Tigerbacker70 on Apr 6, 2016
BEST ANSWER: The batteries are not guaranteed to be new. Generally, the batteries are the same batteries that were returned with the trimmer. The manufacture has tested the batteries and guaranteed them for a year.
Could anyone help me how to replace the string.
Rene on Aug 7, 2015
BEST ANSWER: Turn spool clockwise to unlock as shown in Figure 9. The
white nub inside the spool will rotate away from the spool
window to indicate it is unlocked.Pull the spool straight out to remove.
Remove any dirt and grass from the spool and housing.
5. First, wind new line in the channel of the spool closest to the
holding slots (10C) as shown in Figure 10.
6. Place the end of the cutting line
FIG. 11
(10A) into the retaining hole
Wind the cutting line onto the
spool in the direction of the
arrow on the bottom of the
spool. Make sure to wind the
line on neatly and in layers. Do
not crisscross (Fig. 11).
8. When the wound cutting line
reaches the beginning of the
holding slots (10C), cut the line
approximately 4 inches (106 mm).
Will this work with my other Lith- ion batteries from Dewalt?
Jo Jo on Jul 20, 2015
BEST ANSWER: The Dewalt 20V MAX 5.0 Ah Cordless Lithium-Ion Brushless String Trimmer only works with 20 volt batteries.
Any idea in the run time?
JBird on Jul 10, 2015
BEST ANSWER: The run time on model DCST920P1 is about 30-40min.
Can you use other amp hour battery with this? like the ones for the drills and impacts?
DD on May 2, 2015
BEST ANSWER: Yes,all of the 20v max tools will accept any amp hour batteries.

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 Cordless Lithium-Ion Brushless String Trimmer - DCST920P1,
20V MAX 5.0 Ah Lithium-Ion Battery - DCB205,
20V MAX Lithium-Ion Battery Charger,
Auxiliary Handle and Guard,
0.080 in. Line Pre-wound in Spool
20V MAX Cordless Lithium-Ion Brushless String Trimmer - DCST920P1R,
20V MAX 5.0 Ah Lithium-Ion Battery - DCB205,
20V MAX Lithium-Ion Battery Charger,
Auxiliary Handle and Guard
Availability: In Stock In Stock
Warranty: 3 Year Limited 1 Year Limited
Price: $207.99 $139.99
You Save: N/A $68.00 (33%)


Most DEWALT® Tools purchased on or after January 1, 2004 come with a warranty package that includes:

Three-Year Limited Warranty. DEWALT will repair, without charge, any defects due to faulty materials or workmanship for three years from the date of purchase. This warranty does not cover part failure due to normal wear or tool abuse. For further detail of warranty coverage and warranty repair information, visit or call 1-800-4-DEWALT (1-800-433-9258). This warranty does not apply to accessories or damage caused where repairs have been made or attempted by others. This warranty gives you specific legal rights and you may have other rights which vary in certain states or provinces.

One-Year Free Service Contract. DEWALT will maintain the tool and replace worn parts caused by normal use, for free, any time during the first year after purchase.

90-Day Money Back Guarantee. If you are not completely satisfied with the performance of your DEWALT Power Tool, Laser, or Nailer for any reason, you can return it within 90 days from the date of purchase with a receipt for a full refund - no questions asked.