DeWalt / Drills and Drivers / Impact Drivers / DCF840B

DeWalt DCF840B Impact Driver

DeWalt 20V MAXTool onlyPrice tracked since Jan 2022

$92.00

  • Third-party seller

Usually $81.98 to $89.99 over the past year

Amazon is not the seller right now. This is a third-party price, so it gets no signal and is never counted as a deal.

View on Amazon

Price checked Oct 4 2026, 11:42 AM ET. Prices change. Confirm the live price on Amazon before buying. ToolBuck earns a commission on qualifying purchases.

DeWalt DCF840B Impact driver, 1/4 in., brushless View on Amazon

Specs

Brand DeWalt
Model DCF840B
Type Impact Driver
Battery platform DeWalt 20V MAX
Size and details 1/4 in., brushless
Features Variable Speed
In the box Tool,Belt Hook
Format Tool only

Price History

DeWalt DCF840B price history, 90 daysDeWalt DCF840B price over 90 days. Current price $92.00. Usual range $83.00 to $89.99. Low $77.99, high $99.00.$80$85$90$95$100Jul 6Aug 20Oct 4Now $92.00Usual range$83 to $90DeWalt DCF840B price history, 90 daysDeWalt DCF840B price over 90 days. Current price $92.00. Usual range $83.00 to $89.99. Low $77.99, high $99.00.$80$90$100Jul 6Aug 20Oct 4Now $92.00Usual range$83 to $90

The gray band is the usual range: where the price sat for the middle half of the 90 days shown.

DeWalt DCF840B price over 90 days. Current price $92.00. Usual range $83.00 to $89.99. Low $77.99, high $99.00.

DeWalt DCF840B price history, 1 yearDeWalt DCF840B price over 1 year. Current price $92.00. Usual range $81.98 to $89.99. Low $29.70, high $119.99.$20$40$60$80$100$120Oct 4Apr 5Oct 4Now $92.00Usual range$82 to $90DeWalt DCF840B price history, 1 yearDeWalt DCF840B price over 1 year. Current price $92.00. Usual range $81.98 to $89.99. Low $29.70, high $119.99.$50$100Oct 4Apr 5Oct 4Now $92.00Usual range$82 to $90

The gray band is the usual range: where the price sat for the middle half of the 1 year shown.

DeWalt DCF840B price over 1 year. Current price $92.00. Usual range $81.98 to $89.99. Low $29.70, high $119.99.

DeWalt DCF840B price history, all timeDeWalt DCF840B price over all time. Current price $92.00. Usual range $81.98 to $89.99. Low $29.70, high $119.99.$20$40$60$80$100$120Oct 7Apr 6Oct 4Now $92.00Usual range$82 to $90DeWalt DCF840B price history, all timeDeWalt DCF840B price over all time. Current price $92.00. Usual range $81.98 to $89.99. Low $29.70, high $119.99.$50$100Oct 7Apr 6Oct 4Now $92.00Usual range$82 to $90

The gray band is the usual range: where the price sat for the middle half of the tracked history shown. The all-time line shows the lowest price of each week.

DeWalt DCF840B price over all time. Current price $92.00. Usual range $81.98 to $89.99. Low $29.70, high $119.99.

Line: lowest new price from third-party sellers. Red dot: current price. Gaps mean no offer at that time.

  • Current $92.00 Checked Oct 4 2026, 11:42 AM ET
  • Usual range $81.98 to $89.99 Over the past year
  • Lowest ever $29.70 Mar 6 2026
  • 90-day high $99.00  
  • Drops in 90 days 178  

Batteries That Fit

See all: Batteries That Fit
  • DeWalt DCB205 Battery, 5.0 Ah
    DeWalt DCB205 Battery, 5.0 Ah / $13.00 per Ah
    $65.00 Third-party seller
  • DeWalt DCB204-2 Battery 2-pack, 4.0 Ah
    DeWalt DCB204-2 Battery 2-pack, 4.0 Ah / $13.75 per Ah
    $109.99 Fair, at usual
  • DeWalt DCB204 Battery, 4.0 Ah
    DeWalt DCB204 Battery, 4.0 Ah / $14.62 per Ah
    $58.49 Third-party seller
  • DeWalt DCB324-4 Battery 4-pack, two 4.0 Ah and two 2.0 Ah
    DeWalt DCB324-4 Battery 4-pack, two 4.0 Ah and two 2.0 Ah / $14.91 per Ah
    $178.93 Fair, at usual
  • DeWalt DCB206-2 Battery 2-pack, 6.0 Ah
    DeWalt DCB206-2 Battery 2-pack, 6.0 Ah / $14.92 per Ah
    $179.00 Fair, at usual

Prices checked between Oct 4 2026, 11:27 AM ET and Oct 4 2026, 12:17 PM ET.

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Prices checked between Oct 4 2026, 11:22 AM ET and Oct 4 2026, 12:17 PM ET.

Biggest Movers This Week

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  • Bosch GDS18V-330CN Mid-torque impact wrench, 1/2 in., friction ring, brushless
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Prices checked between Oct 4 2026, 11:22 AM ET and Oct 4 2026, 11:57 AM ET.

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Prices checked between Oct 4 2026, 11:22 AM ET and Oct 4 2026, 12:17 PM ET.

Prices are the Amazon.com price for a new item, or the lowest new third-party price when Amazon is not the seller. "Usual" is this tool's own price over the past 90 days or the past year, whichever is closer to today's price: the usual range is where it sat for the middle half of that time, and percentages are measured against its median price over 90 days or over the past year, whichever is closer to the current price. Out-of-stock time is left out. ToolBuck has price history for this listing going back 1,736 days. Prices and availability are accurate as of the time shown and can change. The price on Amazon at the time of purchase is the one that applies. How ToolBuck works.