DEWALT 20V MAX Atomic DCF850 Impact Driver Review
DEWALT DCF850B ATOMIC 20V MAX* 1/4 in. Brushless Cordless 3-Speed Impact Driver (Tool Only)
$169.00 (price as of 2026-11-07)
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Reddit score
3.9 Based on 10 Reddit owner comments · Top 27% of 15 tracked impact drivers
| Owner sentiment | 4.4 | |
| Recommendations | 3.4 | |
| Spec score | Not rated | |
| Value | 3.3 |
How these are computed: methodology. Components without evidence show “Not rated” and their weight moves to the others.
Is the DEWALT 20V MAX Atomic DCF850 Impact Driver worth it?
Based on 10 Reddit owner comments, the DEWALT 20V MAX Atomic DCF850 Impact Driver scores 3.9 out of 5 (owner comments average 4.3 stars), and the theme owners raise most is power (9 mentions).
Who it suits
- You care about power (9 positive owner mentions)
- You care about compact (9 positive owner mentions)
- You care about value (3 positive owner mentions)
Who should skip it
- Not observed: no recurring complaint theme yet.
What Reddit owners say
10 positive and 0 critical owner comments. Quotes link to the original Reddit comment.
Key specs
As listed on the Amazon product page we checked; missing fields are never estimated.
- Maneuver with ease - compact, under 4 in. design for optimized ergonomics and access to difficult-to-reach spots
- High-performance brushless motor - drive large-diameter screws with 1,825 in-lb. of max torque and 3,250 rpm.
- Pro-level control - work precisely with a variable 3-speed trigger.
- Brighten work areas - help enhance visibility in dimly lit spaces with the integrated 3-led work light.
| Power Source | Battery Powered |
|---|---|
| Maximum Rotational Speed | 3250 rpm |
| Voltage | 20 |
| Maximum Chuck Size | 4 inches |
| Additional Features | Variable Speed |
| Maximum Torque | 18 in-lb |
| Number of Speeds | 3 |
| Speed | 3250 rpm |
| Maximum Power | 300 watts |
| Torque | 1825 in-lb |
| Drill Type | Impact Driver |
| Battery Capacity | 5 amp_hours |
| Battery Type | Lithium-ion |
| Drilling Capacity Wood | 0.25 inches |
| Compatible Devices | DEWALT 20V MAX batteries and chargers |
| Drilling Capacity Metal | 0.25 inches |
| Item Dimensions L x W x H | 3"L x 3"W x 8"H |
| Item Weight | 2.4 pounds |
| Brand Name | DEWALT |
| Included Components | Tool,Belt Hook |
| Model Number | DCF850B |
| UPC | 885911758215 |
| Number of Packs | 1 |
| Manufacturer Warranty Description | 3 yr warranty on material and workmanship |
Drills Supply is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Commissions never affect scores, rankings, or verdicts.
FAQ
Is the DEWALT 20V MAX Atomic DCF850 Impact Driver worth it?
Based on 10 Reddit owner comments, the DEWALT 20V MAX Atomic DCF850 Impact Driver scores 3.9 out of 5 (owner comments average 4.3 stars), and the theme owners raise most is power (9 mentions).
What do Reddit owners complain about with the DEWALT 20V MAX Atomic DCF850 Impact Driver?
We have not observed a recurring complaint theme in owner comments yet.
How much does the DEWALT 20V MAX Atomic DCF850 Impact Driver cost?
It was $169.00 on Amazon when we checked on 2026-11-07. Prices change, so check Amazon for the current price.
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Last updated 2026-11-07. Amazon listing ASIN B09KVLY25Q.