In-depth review
DeWalt 20V Max DCST922B Review
A detailed review of the DeWalt DCST922B string trimmer: 13-inch dual-line cutting on the 20V Max platform.
DeWalt DeWalt 20V Max DCST922B
13-inch dual-line trimmer on the 20V Max platform.
Our verdict
The DCST922B is the smart buy only if you already own DeWalt 20V Max batteries; as a bare tool it undercuts every rival on price while delivering a capable 13-inch dual-line cut. The trade-off is the bump-feed head and narrower swath, both concessions to the 20V platform. Buying it with batteries as your first DeWalt tool erases the value advantage.
What we like
- Runs on the 20V Max battery platform, so existing owners can buy the bare tool
- 13-inch cutting swath with 0.080-inch dual line
- Variable speed trigger gives control for trimming versus full-throttle edging
- Lightweight and well balanced for extended use
What to watch out for
- Bump-feed head requires stopping and bumping to advance line
- Narrower swath than 15-inch class trimmers
- High-drain trimming benefits from a 5.0Ah or larger battery
Who it is for
Existing DeWalt 20V Max owners who want a trimmer that shares batteries with the tools already in their garage.
The platform play
The DCST922B's strongest argument is arithmetic. DeWalt's 20V Max platform spans hundreds of tools, and the trimmer is sold as a bare tool for owners who already have batteries and chargers. If you own the batteries, this is the cheapest entry into a name-brand 13-inch dual-line trimmer. If you do not, the kit price narrows the gap with the EGO enough that the EGO's better head usually wins.
Cutting and control
Documented specs: 13-inch swath, 0.080-inch dual line, bump feed, and a variable speed trigger. The variable trigger is genuinely useful; feathering the speed around flower beds beats an on-off switch, and full throttle is there for weeds. Pro Tool Reviews notes the balance is good for a tool in this class, which matters during long edging sessions.
The bump-feed compromise
Bump feed is the oldest line-advance system: tap the head on the ground and it pays out line. It is reliable and cheap, which is why it is here, but it interrupts your rhythm every time the line shortens. Against automatic systems like EGO's Line IQ or Worx's Command Feed, it feels dated. DeWalt chose it to keep the bare-tool price down.
How it stacks up
Against the EGO ST1521S, the DeWalt loses on swath (13 vs 15 inches), line thickness (0.080 vs 0.095 inch), and feed convenience, but wins on weight and on bare-tool price for existing battery owners. Against the Worx WG163, the DeWalt cuts wider (13 vs 12 inches) with thicker line (0.080 vs 0.065 inch) but lacks the pivoting edger head and costs more.
What owners report
Commonly praised
- Strong cutting power with a responsive variable-speed trigger
- Good runtime, especially with larger 20V packs
- It folds for storage and uses batteries many owners already have
Common complaints
- The front end feels heavy, which tires the arms
- Several owners report the trimmer head wearing or breaking
- Retail ratings are noticeably mixed compared with rival trimmers
Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated October 2026.
Key specifications
- Voltage platform
- 20V Max
- Cutting swath
- 13 inches
- Line diameter
- 0.080 inch dual line
- Line feed
- Bump feed
- Speed control
- Variable speed trigger
Also consider
EGO EGO Power+ ST1521S
15-inch Powerload head with automatic line loading.
- Voltage platform: 56V ARC Lithium
- Cutting swath: 15 inches
Worx Worx WG163
12-inch 2-in-1 trimmer and edger at a budget price.
- Voltage platform: 20V Power Share
- Cutting swath: 12 inches
Research-based assessment. ThePickLedger has not hands-on tested this product; this evaluation synthesizes manufacturer specifications, retailer documentation, and published expert reviews.
Questions, answered
Should I buy the bare tool or the kit?
Bare tool if you already own 20V Max batteries and a charger. The kit if this is your first DeWalt tool; compare the kit price against the EGO ST1521S kit before deciding.
What size battery should I use?
A 5.0Ah battery is the practical minimum for yard work; smaller packs drain fast under the trimmer's load. DeWalt's FlexVolt batteries also fit and extend runtime.
Is bump feed annoying?
It depends on your tolerance. Bumping the head every few minutes is a minor interruption most users adapt to, but automatic-feed owners rarely go back.