DEWALT 20V MAX 4.0Ah Compact Lithium-Ion Battery Pack (DCB240) – Extended Runtime, Lightweight Design, LED Fuel Gauge
DEWALT 20V MAX 4.0Ah Compact Lithium-Ion Battery Pack (DCB240) – Extended Runtime, Lightweight Design, LED Fuel Gauge
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DEWALT

DEWALT 20V MAX 4.0Ah Compact Lithium-Ion Battery Pack (DCB240) – Extended Runtime, Lightweight Design, LED Fuel Gauge

44 ratings

Key item features

  • Extended Runtime: The 4.0Ah capacity delivers extended runtime for demanding applications, providing up to one-third more runtime compared to smaller compact batteries.
  • Compact Design: This battery maintains the same size and weight as the DCB230 3.0Ah battery, offering a compact and lightweight form factor.
  • Efficient Power: With an 80 watt-hour output, it provides balanced power and efficiency for various tasks.
  • Charge Visibility: An integrated 3-LED fuel gauge allows for quick visibility of the remaining battery charge.
  • Improved Ergonomics: Its lightweight and ergonomic design improves tool control and reduces user fatigue during extended use.
  • Broad Compatibility: The battery is fully compatible with all DEWALT 20V MAX tools and chargers.
  • Versatile Application: Ideal for both professional contractors and DIY users, suitable for overhead work, precision tasks, and extended runtime needs.
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Specs

Volts, 20 VoltsBattery capacity, 4 AhCompatibility, DEWALTCompatible models, DeWalt 20V MAXBrand, DEWALTWorks with, 20V MAX tools

About this item

Product details

Get extended runtime in a compact, lightweight form factor with the DEWALT DCB240 20V MAX 4.0Ah Compact Lithium-Ion Battery Pack. Designed for professional contractors and DIY users, this battery delivers high capacity without added bulk, making it ideal for overhead work and applications that require precise tool control. The 4.0Ah (80 watt-hour) capacity provides up to one-third more runtime compared to smaller compact batteries, while maintaining the same size and weight as the DCB230 3.0Ah compact battery. This balance of power and portability helps reduce fatigue and improves maneuverability during extended use. Despite its compact footprint, the DCB240 delivers strong, consistent performance for drilling, fastening, cutting, and sanding tasks. An integrated 3-LED fuel gauge allows users to quickly check remaining charge and plan work efficiently to avoid interruptions. Fully compatible with the entire DEWALT 20V MAX cordless tool and charger system, the DCB240 is an excellent upgrade for users who want longer runtime without moving to larger, heavier battery packs.
  • 4.0Ah capacity – delivers extended runtime for demanding applications
  • Compact battery design – same size and weight as the DCB230 3.0Ah battery
  • Up to one-third more runtime – compared to smaller compact batteries
  • 80 watt-hour output – balanced power and efficiency
  • 3-LED fuel gauge – quick visibility of remaining battery charge
  • Lightweight and ergonomic – improves tool control and reduces fatigue
  • System compatibility – works with all DEWALT 20V MAX tools and chargers
  • Ideal for pros and DIY users – overhead work, precision tasks, and extended runtime needs
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Specifications

Volts

20 Volts

Battery capacity

4 Ah

Compatibility

DEWALT

Compatible models

DeWalt 20V MAX

Warranty

Warranty information

N/A

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Warnings

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Customer ratings & reviews

4.5 out of 5 stars
stars
44 ratings28 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars68% (30)
  2. 4 stars18% (8)
  3. 3 stars9% (4)
  4. 2 stars0% (0)
  5. 1 star5% (2)

Reviews summary

Pros

  • : Provides lots of power quickly.
  • : Lasts long in a smaller package.
  • : Offers a great power-to-weight ratio.
  • : Lasts throughout the day without issues.
  • : Weighs less and has a smaller size.
  • : This product has a smaller footprint without sacrificing performance.
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Showing 1-3 of 28 reviews

Jun 30, 2025
Reviewer name: Randy
Sold and shipped byPetty Commodities
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

It preformed as promised at a good price.

Incentivized Review
Helpful?7HLJ2E2WVN36365608676
Jan 14, 2023
Reviewer name: Ethan
5 out of 5 stars
5 out of 5 stars review

Great batteries, buying more

[This review was collected as part of a promotion.] Great batteries, just as much power as the large 4ah batteries but in a much smaller package. Great for hvac because its not sticking an extra inch off the bottom of your tools in tight spaces. They are durable, accidently let mine slide of a 2 story roof (not worth chasing) picked it up no issues at all.

Review from dewalt.com
Helpful?7HLJ2E2WVN36365608676
Jan 4, 2023
Reviewer name: Geneco
5 out of 5 stars
5 out of 5 stars review

Great little battery

[This review was collected as part of a promotion.] I received my 4Ah batteries and was anxious to start a project where I could test them more than just sticking them on a drill and proving that they work. We had a small house trim job coming up and that was the perfect opportunity. I put one on a 7 1/4" miter saw and one on a 16ga trim nailer. The nailer was used for 8 hours and the battery was still going strong. The battery on the miter saw lasted around 5 hours with almost constant use. I really don't like to take a battery all the way down because you take a chance it won't take a charge, but this one charged right back up and went back to work. I like the size and may consider my next battery purchase to be the 4Ah instead of the 5Ah.

Review from dewalt.com
Helpful?7HLJ2E2WVN36365608676
Current price is Now $42.00
You save $4.94
was $46.94
$31.82/lb
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