Batteries & Chargers

DEWALT 20V MAX 4 Ah Lithium Ion Battery 2-Pack (DCB240-2)

Name: DEWALT 20V MAX 4 Ah Lithium Ion Battery 2-Pack (DCB240-2)
Brand: DEWALT
Price: 120 USD
Availability: InStock

★ 4.7/5 (1031 reviews)

$120.00

DEWALT 20V MAX 4 Ah Lithium Ion Battery 2-Pack (DCB240-2)

As an Amazon Associate, Mowers.Cloud earns from qualifying purchases.

Check current price, fitment notes, and availability on Amazon:

🛒 See Price on Amazon

What It Is

This is a genuine DEWALT 2-pack of 20V MAX 4Ah lithium-ion batteries (model DCB240-2). Designed to power DEWALT 20V MAX cordless lawn mowers, trimmers, blowers, and other outdoor power equipment, it provides extended runtime compared to standard 2Ah packs.

Fitment & Compatibility

Brand fit: Works only with DEWALT 20V MAX tools and chargers. Not compatible with DEWALT 60V FLEXVOLT or 12V MAX systems without an adapter.
Tool compatibility: Fits all DEWALT 20V MAX lawn mowers (e.g., DCMW220, DCMW225) and most 20V MAX outdoor tools. Does not fit older DEWALT 18V NiCad tools.
Charger compatibility: Charges on any DEWALT 20V MAX charger (DCB101, DCB105, DCB107, etc.). The 4Ah capacity charges in about 1 hour on a standard charger.
Check before buying: Verify your mower’s battery voltage requirement (20V MAX only), battery compartment size (these are slightly larger than 2Ah packs), and that you have a compatible DEWALT charger. If you have a 60V mower, these batteries will not work.

Key Things to Know

Runtime: 4Ah provides roughly 2x the runtime of a 2Ah battery. Expect 30–45 minutes of mowing on a standard 20V MAX mower (depending on grass conditions).
Installation: No tools needed—slides directly into tool battery port. Ensure battery clicks into place securely before use.
Gotchas: These are “20V MAX” (nominal 18V) batteries—they are not interchangeable with DEWALT’s 60V FLEXVOLT packs. Over-tightening the battery lock can make removal difficult; press the release tab firmly.
Quality: Genuine DEWALT cells with built-in fuel gauge (3-LED indicator). Avoid counterfeit sellers—verify seller reputation.

Should You Buy It

Yes, if you own a DEWALT 20V MAX lawn mower or other 20V MAX outdoor tools and need reliable, long-lasting runtime. The 4Ah capacity is a sweet spot for mowing—long enough to finish most small-to-medium lawns without the weight of a 6Ah or 9Ah pack. Skip if you have 60V tools or prefer aftermarket batteries for lower cost.