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DEWALT DCD794D1 Atomic 20V Drill Driver vs DeWalt 20V Max DCD777C2 Drill/Driver

Both are compact 20V brushless DeWalt drill/drivers with 1/2 in. keyless chucks and two speeds. The DCD794D1 (ATOMIC) is the newer, lighter tool at about 2.4 lbs with a shorter head and 404 UWO, so it drills harder for its size and is easier to hold overhead. The DCD777C2 is the older workhorse: 340 UWO, a 20-second LED delay, and two batteries in the kit, which owners like for all-day jobs. Buy the DCD794D1 for one-handed control and punch in tight spots; buy the DCD777C2 if you want a spare battery and proven reliability.

  • Choose the DCD794D1 if you want the lightest, most compact body with the most power per pound and a single battery is enough.
  • Choose the DCD777C2 if you want two batteries in the box, a delayed LED for dark spaces, and a long-proven design.

Prices

  • DEWALT DCD794D1 Atomic 20V Drill Driver: $135.00 at Walmart (checked today)
  • DeWalt 20V Max DCD777C2 Drill/Driver: $62.39 at eBay (checked today)
  • Difference: the DeWalt 20V Max DCD777C2 Drill/Driver is $72.61 cheaper than the DEWALT DCD794D1 Atomic 20V Drill Driver today
DEWALT
DEWALT DCD794D1 20V Cordless 5 in Drill Driver

DEWALT DCD794D1 Atomic 20V Drill Driver

DEWALT DCD794D1 20V Cordless 5 in Drill Driver

4.6(65 ratings)
$135.00at WalmartObserved at 11:22 PM
See all prices and details
Visit Walmart
Pros
  • Lightest and shortest body in this pair
  • Most torque per pound at 404 UWO
  • Brushless motor, two speeds, LED
  • Newer ATOMIC platform
Cons
  • Only one battery in the kit
  • 2.0 Ah pack runs out faster than two packs
  • No delayed LED
DeWalt
DeWalt 20V Max DCD777C2

DeWalt 20V Max DCD777C2 Drill/Driver

DeWalt 20V Max DCD777C2

4.8(180 ratings)
$62.39at eBayVerified
See all prices and details
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Store links may earn us a commission.

Pros
  • Two batteries included, so one charges while you work
  • 20-second LED delay lights dark corners
  • Long track record and higher owner rating
  • Ratcheting single-sleeve chuck
Cons
  • Heavier and longer than the ATOMIC
  • Less torque at 340 UWO
  • Older design

What separates them

DEWALT DCD794D1 Atomic 20V Drill DriverDeWalt 20V Max DCD777C2 Drill/Driver
Motor power404 UWO340 UWO
WeightAbout 2.4 lbsListed at 5.8 lbs (kit weight with two batteries)
Head length5.88 in. tool head7.6 in. front to back
Batteries in kitOne 2.0 AhTwo 1.5 Ah
LED lightStandard LEDLED with 20-second trigger-release delay
Chuck1/2 in. keyless1/2 in. single-sleeve ratcheting keyless
Speed range0-450 / 0-1650 RPM0-450 / 0-1500 RPM
Owner ratings4.6 of 5 from 65 ratings4.8 of 5 from 180 ratings

Price history

$186.72$71.49
Oct 28Nov 9
  • DEWALT DCD794D1 Atomic 20V Drill Driver: lowest $95.04 on Nov 8 at Arbor; $99.00 on Nov 9.
  • DeWalt 20V Max DCD777C2 Drill/Driver: lowest $71.49 on Nov 8 at eBay; $159.00 on Nov 9.

Prices at every store

DEWALT DCD794D1 Atomic 20V Drill Driver

  • WalmartNew

    Availability unknownSold by Abes Electronics Center

    $135.00Observed at 11:22 PM
    Visit Walmart

Also available at

  • WalmartCheck price at Walmart
  • Home DepotCheck price at Home Depot
  • WebstaurantStore.comCheck price at WebstaurantStore.com
Prices and history →

DeWalt 20V Max DCD777C2 Drill/Driver

  • Lowe'sNew

    In stock

    $159.00Free shippingObserved at 11:00 PM
    Visit Lowe's
  • eBayNew

    Availability unknownSold by mikeandreev88 (100% positive, 82 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $62.39Free shippingVerified
    Visit eBay
  • ArborNew

    Availability unknown

    $98.01Observed Nov 8, 2026, 5:54 PM
    Visit Arbor
  • EnvMartNew

    Availability unknown

    $153.11Observed Oct 30, 2026, 10:01 AM
    Visit EnvMart

Also available at

  • eBayCheck price at eBay

Store links may earn us a commission. Some prices via Klarna.

All 11 stores and price history →

Specs compared

SpecDEWALT DCD794D1 Atomic 20V Drill DriverDeWalt 20V Max DCD777C2 Drill/Driver
Tool TypeCordless Drill/DriverDrill/Driver, Cordless Drill/Driver, Cordless D…
Power TypeCordlessCordless
Power Voltage20V20V
Amperage2 Amps0 Amps
Chuck Size1/2 in.1/2 in
Chuck TypeKeylessKeyless
Motor TypeBrushlessBrushless
Max Speed1650 RPM1750 RPM
Torque404 UWO500 in-lbs
Battery Voltage20V20V MAX*
Battery Capacity2 Ah1.3 Ah
Battery IncludedYesYes
Show all 40 specsShow fewer specs
SpecDEWALT DCD794D1 Atomic 20V Drill DriverDeWalt 20V Max DCD777C2 Drill/Driver
Battery TypeLithium Ion20V MAX* Compact Li-ion
Number Of Batteries Included12
Battery Charging Time1 hr1 hr
Included AccessoriesChargerCharger
Height7.97 in.7 inches
Length5.88 in. (tool head length only)7.52" (front to back)
Weight2.4 lbs.5.8 lbs.
Width2.49 in.2.5 inches
Functionality HighlightsVariable speedVariable speed

What reviewers say

DEWALT DCD794D1 Atomic 20V Drill Driver

  • 4.6 / 565 ratings

Rated 4.6 out of 5 from 65 ratings, buyers like the small size and light weight for assembly and tight-space work. The main complaints are the single small battery and the lack of hammer function.

What people mention
  • SizePraisedOwners say the short head and slim body get into cabinets and between studs where larger drills will not fit.
  • WeightPraisedAt about 2.4 lbs bare, buyers find it easy to hold overhead and for long assembly sessions.
  • PowerPraisedThe brushless motor and 404 UWO are described as strong for a compact drill.
  • BatteryCriticisedReviewers say the single 2.0Ah pack runs down quickly in sustained drilling and a second battery would help.

DeWalt 20V Max DCD777C2 Drill/Driver

  • 4.8 / 5180 ratings

Rated 4.8 out of 5 from 180 ratings, owners treat the DCD777C2 as a dependable general-purpose drill. They like the compact size, the brushless run time and the two-battery kit. The main complaints are the small 1.5 Ah batteries and limited torque for heavy jobs.

What people mention
  • Battery lifeMixedOwners say the brushless motor stretches each charge, but the 1.5 Ah packs drain fast in heavy drilling.
  • Size and weightPraisedThe 7.6-inch body fits into tight spaces, though some find 5.8 lbs on the heavy side.
  • PowerMixed340 UWO and 500 in-lbs handle everyday drilling and driving but struggle with large hole saws.
  • ChuckPraised

Questions and answers

Which is better for driving long screws?
The DCD794D1. Its 404 UWO beats the DCD777C2's 340 UWO, and its lighter body is easier to control one-handed.
Which has better battery life on a job?
The DCD777C2 kit ships with two batteries, so you can keep working while one charges. The DCD794D1 kit has one 2.0 Ah pack.
Which is easier to use in tight spaces?
The DCD794D1. Its head is about 5.88 in. long versus 7.6 in. on the DCD777C2, and it weighs less.
Which lasts longer?
Both use brushless motors and DeWalt's 3-year limited warranty. The DCD777C2 has the longer field record; the DCD794D1 is newer.
Is the DCD794D1 worth stepping up to over the DCD777C2?
Yes if compact size and power matter most. Stay with the DCD777C2 if a second battery and the delayed LED matter more.
Do both use the same 20V MAX batteries?
Yes. Both run on DeWalt 20V MAX lithium-ion packs, so batteries and chargers interchange between them.

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Number Of Speed Settings
2 (0-450/0-1650 RPM)
2
Built In FeaturesLED lightLED light
Design HighlightsCompactBuilt-in LED light
BrandDEWALTDEWALT
Maximum speed1650 rpm1,750 RPM
Charger includedYYes
colorBlack—
size7.97"L x 2.49"W x 7.97"H—
Electric motor typeBrushless—
Volts20 Volts—
Is variable speedY—
Speeds2—
Batteries inclY—
Number of batteries1—
FeaturesVariable Speed—
AccessoriesCase—
Rec. useHome—
Product line20V MAX ATOMIC—
ManufacturerDeWalt—
The 1/2-inch keyless ratcheting chuck grips bits firmly and is easy to change.
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