DeWALT

DEWALT DCF845B Impact

Impact
Battery
2.2 pounds
20 volts

4.7/ 5 on Amazon12,700Amazon ratings1,000+bought last month4.6ProductDome score

Better rated than 62%
More reviewed than 100%

High confidenceLast refreshed Aug 4, 2026Amazon data + ProductDome analysis · methodology

Best forYou want a lightweight impact driver on the DeWalt 20V platform for repetitive fastening

A compact 20V impact driver at about 2.2 pounds with a 3400 RPM top speed. A practical fit for anyone already using DeWalt 20V batteries.

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ProductDome scorecard

How it ranks among the 284 impacts we track

4.6/ 5ProductDome scoreHigh confidence

Owner satisfaction · 56% of scorecategory median 4.6★4.7

4.7★ across 12,700 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 360 ratings5.0

12,700 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score4.1

1,000+ bought on Amazon last month.

Data quality · 11% of score3.8

Brand identity, imagery, description and spec coverage.

The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 284 impacts we track - how the scorecard works · full impacts data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.

Overview

DeWalt's DCF845B impact driver runs on the 20V MAX platform, spinning to 3400 RPM at a listed weight of about 1 kilogram. It is built as a compact driver for repetitive fastening work.

Weight matters more than raw numbers suggest when you are driving screws overhead for an hour, and the DCF845B's roughly 2.2 pounds should help there. As with the other DeWalt tool in this batch, no seller description or review text accompanies the listing, so this page works from the spec sheet alone.

4.7 average rating
12,700 customer reviews
1,000 bought in the past month
20 volt battery power source

Who it's for

Tradespeople doing repetitive fastening work who want a lighter impact driver and are already on DeWalt's 20V battery system. Not the pick for someone needing documented torque figures before buying, since none are listed here.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

Light at about 1 kilogram
3400 RPM top speed
Runs on DeWalt's 20V MAX batteries

What to check first

No torque specification listed
Battery inclusion not confirmed

Performance notes

The 3400 RPM top speed points to quick driving on standard fasteners, and the roughly 1 kilogram weight should ease fatigue during extended use. No torque or impacts-per-minute figures are given, so heavy-duty capability cannot be confirmed from this data.

Specifications

Brand	DeWALT
Model	DCF845B
Power Source	Battery
Item Weight	2.2 pounds
Voltage	20 volts
Speed	3400 rpm

How it compares

This product against the closest alternatives we track in impacts.

Product	Amazon rating	Ratings	ProductDome score
DEWALT DCF845B ImpactThis product	4.7 / 5	12,700	4.6 / 5
Milwaukee 2457-20 ImpactMILWAUKEE	4.6 / 5	8,078	4.5 / 5
GEARWRENCH 81270 ImpactGEARWRENCH	4.7 / 5	4,983	4.4 / 5
AOBEN AB7331T ImpactAOBEN	4.4 / 5	10,707	4.4 / 5
Ryobi P235A ImpactRyobi	4.7 / 5	4,700	4.4 / 5

Frequently asked

Questions about the DeWALT DCF845B

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

What is the top speed of the DCF845B?

It is rated at 3400 RPM.

How much does the DCF845B weigh?

About 1 kilogram, roughly 2.2 pounds.

Does the DCF845B need a specific battery?

It runs on DeWalt's 20V MAX battery platform.