DEWALT DCF850B Impact Review
Our verdict
The DEWALT DCF850B is a 20-volt MAX battery-powered impact driver rated at 3,250 RPM and 4.7 stars from 360 owner reviews, priced at $135.49 as a compact, high-speed option in the DEWALT ecosystem.
Check price on AmazonBest for
DEWALT 20V MAX platform users who want a compact, fast impact driver with a strong review record for trade or demanding DIY work
Skip if
You need a complete kit with batteries and charger at this price, or you are not already in the DEWALT 20V MAX ecosystem
- Power Source Battery Powered
- Voltage 20
- Speed 3250 RPM
- Dimensions 3"L x 3"W x 8"H
Our scorecard
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Owner rating4.7/5
4.7 average across 360 owner ratings
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Popularity2.3/5
360 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other power tools and workshop machinery we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
The DEWALT DCF850B is the compact flagship of DEWALT's 20-volt impact driver line, running at 3,250 RPM in a 3-inch wide by 8-inch tall body. That dimensions profile, at 3 inches long by 3 inches wide by 8 inches tall, makes it one of the smaller 20V impact drivers on the market, while the 3,250 RPM speed keeps it competitive against larger models. The 4.7-star rating from 360 reviews confirms strong buyer satisfaction.
At $135.49, the DCF850B sits in the upper-mid price range for 20V cordless impact drivers. The DEWALT 20V MAX platform is one of the most widely adopted cordless ecosystems in both the professional trades and serious DIY communities, meaning existing battery owners can add this driver without additional battery investment.
The listing does not publish a weight figure, which is a gap for buyers who prioritize ergonomics data. The compact dimensions suggest it is lighter than full-size 20V impact drivers, but a confirmed weight is not available from this listing. For buyers already in the DEWALT system, the combination of 3,250 RPM speed and the compact form factor makes the DCF850B a compelling high-speed option.
Pros
- 3,250 RPM no-load speed puts it among the faster 20V impact drivers available
- Compact 3 by 3 by 8-inch body improves access in tight framing, cabinet, and automotive spaces
- 4.7-star rating from 360 reviews reflects consistent buyer satisfaction
- DEWALT 20V MAX platform compatibility leverages one of the broadest cordless tool ecosystems
Cons
- No weight published in the listing, leaving an ergonomics data gap
- $135.49 bare-tool price requires existing DEWALT 20V MAX batteries for full operation
- No amperage figure listed, limiting battery runtime estimation
Specifications
| Power Source | Battery Powered |
|---|---|
| Voltage | 20 |
| Speed | 3250 RPM |
| Dimensions | 3"L x 3"W x 8"H |
Performance notes
Battery-powered, 20-volt MAX platform, 3,250 RPM no-load speed, compact body measuring 3 inches long by 3 inches wide by 8 inches tall. The 3,250 RPM output is well suited for sustained trade-grade fastening including framing hardware, structural screws, and production assembly. The compact dimensions specifically benefit users driving fasteners in tight wall cavities or confined automotive access points.
What buyers say
Owners praise the driver's speed and compact size as the standout features. The 20V MAX platform compatibility with existing DEWALT tools and batteries is a consistent positive. Some buyers note the tool-only format requires a separate battery purchase, which can catch first-time DEWALT buyers off guard.
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Frequently asked questions
Is the DEWALT DCF850B the same as the DCF850?
The 'B' suffix in DEWALT naming typically indicates a bare tool (no battery or charger included). The DCF850B is the tool-only version, so you will need compatible DEWALT 20V MAX batteries and a charger to operate it.
How does the DCF850B compare in size to other DEWALT 20V impact drivers?
At 3 inches long by 3 inches wide by 8 inches tall the DCF850B is a compact design within the DEWALT 20V lineup. Exact comparisons depend on which specific model you are evaluating against. Contact hello@toolgalaxy.com if you need help comparing dimensions across DEWALT models.