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DeWalt DCD805B 20V Hammer Drill vs DeWalt DCD799B Atomic Hammer Drill

Both are compact 20V brushless DeWalt hammer drills sold as bare tools, so the choice comes down to speed versus torque. The DCD805B spins faster at 2,000 RPM with a higher 34,000 BPM impact rate and a three-mode LED, which suits fast drilling and driving plus occasional masonry. The DCD799B is the shorter Atomic body with more stated power at 552 UWO, better for tight spaces and heavier masonry bits. Owners of the 805B rate it well overall, but some report battery fit problems on certain units, so buy from a seller with easy returns.

  • Choose the DCD805B if you want the faster spindle and impact rate for mixed drilling, driving and light masonry, and you value the three-mode light.
  • Choose the DCD799B if you work in tight spots and want the shortest 20V hammer drill with more stated power for masonry.

Prices

  • DeWalt DCD805B 20V Hammer Drill: $57.99 at eBay (last seen Nov 4)
  • DeWalt DCD799B Atomic Hammer Drill: $79.90 at Walmart (checked today)
  • Difference: the DeWalt DCD805B 20V Hammer Drill is $21.91 cheaper than the DeWalt DCD799B Atomic Hammer Drill at the latest prices (Nov 4 and Nov 11)
DEWALT
Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only)

DeWalt DCD805B 20V Hammer Drill

Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only)

4.4(82 ratings)
$57.99at eBayChecked Nov 4
See all prices and details
Visit eBay
Pros
  • Higher RPM and BPM for faster drilling and driving
  • Three-mode LED with 70 lumens lights dark work areas
  • Light at 2.3 lbs with a short 6-15/16 in body
  • Chip pocket for the Tool Connect tracker
  • Depth gauge and side handle included
Cons
  • Lower stated torque than the DCD799B
  • Some buyers report batteries that won't lock in or come off
  • A few units described as imitations or used, so check the seller
  • Bare tool: battery and charger sold separately
DEWALT
DeWalt DCD799B 20-Volt MAX Atomic Cordless Compact Hammer Drill, 1/2 In., TOOL ONLY

DeWalt DCD799B Atomic Hammer Drill

DeWalt DCD799B 20-Volt MAX Atomic Cordless Compact Hammer Drill, 1/2 In., TOOL ONLY

4.1(8 ratings)
$79.90at WalmartChecked 41 min ago
See all prices and details
Visit Walmart
Pros
  • 552 UWO for masonry drilling in tight spaces
  • DeWalt's shortest 20V MAX hammer drill
  • Brushless motor on the same 20V battery platform
  • Belt hook included
Cons
  • Slower 1,650 RPM spindle
  • Single-mode LED only
  • Heavier at 2.8 lbs
  • No stated Tool Connect support or depth gauge

What separates them

DeWalt DCD805B 20V Hammer DrillDeWalt DCD799B Atomic Hammer Drill
Max speed2,000 RPM1,650 RPM
Impact rate34,000 BPM0-28,050 BPM
Stated power330 in-lbs torque552 UWO
Length6-15/16 in, shortened bodyDeWalt's shortest 20V MAX hammer drill
Weight2.3 lbs2.8 lbs
Work light3-mode LED, 70 lumensSingle on-tool LED
Speed settings2Not stated
Tool ConnectChip pocket for DCE042Not listed

Price history

$199.00$57.99
Nov 1Nov 12
  • DeWalt DCD805B 20V Hammer Drill: lowest $57.99 on Nov 4 at eBay; $85.00 on Nov 12.
  • DeWalt DCD799B Atomic Hammer Drill: lowest $75.00 on Nov 1 at Amazon; $79.90 on Nov 12.

Prices at every store

DeWalt DCD805B 20V Hammer Drill

  • eBayNew

    In stock

    $59.99Free shippingChecked Nov 9
    Visit eBay
  • MercariNew

    In stock

    $85.00+ $12.99 shippingChecked 40 min ago
    Visit Mercari
  • eBayNew

    Availability unknown

    $57.99Checked Nov 4
    Visit eBay
  • EtsyNew

    Availability unknownSold by Seller

    $90.74Checked Nov 9
    Visit Etsy

Also available at

  • ToolUp.comCheck price at ToolUp.com
  • Dewalt Authorized SellerCheck price at Dewalt Authorized Seller

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All 21 stores and price history →

DeWalt DCD799B Atomic Hammer Drill

  • WalmartNew

    In stockSold by Nalusneakers LLCReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $79.90Free shippingChecked 41 min ago
    Visit Walmart
  • Home DepotNew

    In stock

    $143.02Free shippingChecked 41 min ago
    Visit Home Depot
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $79.90Free shippingChecked 41 min ago
    Visit Amazon
  • eBayNew

    Availability unknownSold by ahgroup941 (100% positive, 8 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $92.00+ $10.07 shippingChecked Nov 8
    Visit eBay

Also available at

  • WalmartCheck price at Walmart
  • eBayCheck price at eBay
  • Tool NutCheck price at Tool Nut

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All 17 stores and price history →

Specs compared

SpecDeWalt DCD805B 20V Hammer DrillDeWalt DCD799B Atomic Hammer Drill
colorYellowBrown
size2 lbs1
Tool TypeHammer Drill Driver, Hammer Drill, Hammer Drill…Hammer Drill
Power TypeCordless, BatteryBattery
Power Voltage20V20V
Amperage2 Amps4 Amps
Chuck Size1/2 in1/2 in
Chuck TypeKeylessKeyless
Motor TypeBrushlessBrushless
Battery Voltage20V20V
Battery Capacity2 Ah2.0Ah
Battery IncludedNoNo
Show all 40 specsShow fewer specs
SpecDeWalt DCD805B 20V Hammer DrillDeWalt DCD799B Atomic Hammer Drill
Battery TypeLithium-Ion (Li-Ion)Lithium Ion
Number Of Batteries Included11 (with kit)
Max Speed2000 RPM1650 RPM
Torque330 in-lbs552 UWO
Impact Rate34,000 BPM0-28050 BPM
Included AccessoriesBelt Hook, Belt BuckleBelt Hook
Height8.14 in7.97 in.
LengthShortened length, 6-15/16 in.6.5 in. (tool head)
Weight2.3 lbs2.53 lbs.

What reviewers say

DeWalt DCD805B 20V Hammer Drill

  • 4.4 / 582 ratings

Rated 4.4 out of 5 from 82 ratings, the drill draws praise for its compact size and power. The complaints that stand out are about fakes and battery fit, not the design itself.

What people mention
  • SizePraisedOwners like the short profile for working in tight spaces.
  • PowerPraisedBuyers say it has plenty of power for a compact drill.
  • Battery fitCriticisedSome report batteries that would not line up, lock in or come off.
  • AuthenticityCriticisedSeveral buyers describe their unit as a counterfeit or imitation.

DeWalt DCD799B Atomic Hammer Drill

Owners of the Atomic line generally rate the compact DeWalt drills well for size and power in tight spots. The main complaints are about buying bare tools and about hammer performance on hard concrete.

What people mention
  • SizePraisedOwners like how short the body is for work between studs and in cabinets.
  • PowerPraisedThe brushless motor is seen as strong for a drill this small.
  • Hammer modeMixedIt handles brick and block but bogs down in hard concrete.
  • BatteryMixedBare-tool buyers must supply their own pack, and small packs run out fast.

Questions and answers

Which is better for drilling masonry?
The DCD799B has the higher stated power at 552 UWO, which helps with larger masonry bits. The DCD805B hits harder and faster at 34,000 BPM, so it is fine for small anchors and holes. For repeated concrete work, step up to a full-size rotary hammer.
Which is better for driving screws?
The DCD805B. Its 2,000 RPM spindle and two speed settings give more control for fastening, and the three-mode light helps in cabinets and closets.
Which is shorter for tight spaces?
The DCD799B. DeWalt calls it its shortest 20V MAX hammer drill, and it is built for work between studs and under sinks. The DCD805B is also compact at 6-15/16 in.
Do both use the same batteries?
Yes. Both run on DeWalt 20V MAX lithium-ion packs and are sold as bare tools. DeWalt notes the DCD805B works best with the DCB205 or DCBP034 battery.
Is the DCD805B worth stepping up to over the DCD799B?
Step up to the DCD805B if speed, the three-mode light and the Tool Connect pocket matter to you. Stay with the DCD799B if raw masonry power and the shortest body matter more.
Which lasts longer?
Both use brushless motors and share DeWalt's 20V platform, so life depends on the battery and how hard you push them. The DCD799B's higher power may suit heavy masonry better, while the DCD805B runs cooler at high speed for drilling and driving.

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More comparisons

  • Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only) vs Dewalt 20V Max XR Cordless Hammer Drill (DCD1007)
  • DEWALT 20V MAX Brushless Cordless 1/2-inch Hammer Drill Kit w/ Battery, Charger vs Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only)
  • DEWALT 20V MAX XR 1/2 Inch Brushless Cordless Hammer Drill Kit vs Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only)
  • Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only) vs DeWalt DCD 800
  • DeWalt DCD799B 20-Volt MAX Atomic Cordless Compact Hammer Drill, 1/2 In., TOOL ONLY vs Dewalt 20V Max XR Cordless Hammer Drill (DCD1007)
  • Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only) vs DEWALT DCD795D2 20V XR Lithium-Ion Brushless Compact Hammer Drill Kit
  • Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only) vs DEWALT DCD1007B-NKX 20V MAX XR 1/2" Hammer Drill and Driver, POWER DETECT Brushless Cordless Drill with 1,530 in-lbs of Max Torque, 3-Speed Transmission, 20V MAX, Tool Only
  • Milwaukee M18 FUEL 1/2" Hammer Drill/Driver Kit vs Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only)

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Width
3
2.49 in.
Functionality HighlightsHammer functionHammer function
Number Of Speed Settings22
Capacity5/32 - 1/2 in (Optimum drilling range)1/2 in (maximum solid bit)
Built In FeaturesDepth GaugeLED work light
Impact FunctionYesYes
Auto LockNoNo
Hammer FunctionYesYes
Drill FunctionYesYes
Power SourceBatteryBattery
Multiple GearsYesYes
Voltage (V)20.020.0
LED LightingYesYes
No. of Batteries (pcs)00
BrushlessYesYes
Weight (lb)2.952.8
Battery Charging Time22 min—
Design HighlightsCompact—
Handle TypeSide Handle—