Is the DCB240 worth it over the 3.0Ah DCB230?

Yes, if you want more runtime without more bulk. It is the same size and weight as the DCB230 but holds 4.0Ah, so you get longer runs per charge.

Does it fit all DEWALT 20V MAX tools?

Yes. It works with every DEWALT 20V MAX cordless tool and charger, including drills, impact drivers, saws and sanders.

Is this a high-output battery?

No. It is a standard-output compact pack. For high-draw tools like circular saws, DEWALT's PowerStack or larger 5.0Ah packs deliver more current.

Does it come with a charger?

No. The DCB240 is sold as a battery only; chargers are sold separately.

How do I check the charge level?

Press the button on the built-in 3-LED fuel gauge. It shows roughly how much charge remains.

Can I leave it on the charger?

DEWALT chargers are designed to maintain the pack, but for long storage it is best to keep it cool and partly charged.

DEWALT 20V MAX 4.0Ah Compact Lithium-Ion Battery Pack (DCB240)

Q: Where is the DEWALT 20V MAX 4.0Ah Compact Lithium-Ion Battery Pack (DCB240) cheapest?

At eBay, for $40.99, 72% under what the other stores charge, as of our latest check.

Q: What do buyers say about the DEWALT 20V MAX 4.0Ah Compact Lithium-Ion Battery Pack (DCB240)?

Rated 4.5 out of 5 from 42 ratings.

Q: Where can I buy the DEWALT 20V MAX 4.0Ah Compact Lithium-Ion Battery Pack (DCB240)?

13 stores we checked sell it, including Home Depot, Ace Hardware, Lowe's, Acme Tools, SupplyHouse.com.

Best price now

$40.99at eBayObserved at 7:53 PM

72% under what the other stores charge

Compared across 13 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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What reviewers say

4.5 / 542 ratings

Owners rate the DCB240 around 4.5 out of 5 and mostly praise its runtime, light weight and reliable fit in 20V MAX tools. Complaints center on value against cheaper alternatives and on it being a standard-output pack rather than a high-output one.

What people mention

RuntimePraisedOwners say it lasts noticeably longer than the smaller compact packs in drills and drivers.
Weight and sizePraisedReviewers like that it stays compact and light, which helps with overhead and precise work.
ValueCriticisedSome owners feel it costs more than third-party batteries that perform similarly.
Fuel gaugePraisedThe 3-LED gauge is described as accurate and useful for planning work.
High-draw useMixedIt handles most tasks, but some users say saws and grinders drain it faster than high-output packs.

About the DEWALT 20V MAX 4.0Ah Compact Lithium-Ion Battery Pack (DCB240)

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.