DeWalt 20V to Milwaukee M18 Battery Adapter

Power your Milwaukee M18 tools with the DeWalt 20V MAX battery you already own.

The Mach 1 DL18ML adapter lets you run Milwaukee M18 18V tools using a DeWalt 20V MAX battery. No need to invest in a second battery platform — snap the adapter onto your DeWalt battery, then slide it into your Milwaukee tool.

Key Features

• Cross-brand compatibility — use one DeWalt battery across your Milwaukee M18 tools
• Plug-and-play design — no wiring or modification required
• Durable construction — built for a secure connection and efficient power transfer
• Works across multiple M18 tools — drills, impact drivers, saws, lights, and more
• Saves on battery costs — get more value from batteries you already own

Compatibility

Works with these DeWalt 20V MAX batteries:
DCB200, DCB201, DCB203, DCB204, DCB206, DCB207, DCB609, and other compatible lithium-ion packs — including the Mach 1 DeWalt 20V 5Ah and DeWalt 20V 9Ah batteries.

Powers these Milwaukee M18 battery-slot tools:
Compatible with tools built for 48-11-1811, 48-11-1820, 48-11-1850, 48-11-1852, 48-11-1840, and other M18 battery packs.

Specifications

What's in the Box

• 1 × Mach 1 DeWalt-to-Milwaukee Battery Adapter

Frequently Asked Questions

Does this adapter affect tool performance?
No. It passes power through directly, so your Milwaukee tool runs at normal performance using the connected DeWalt battery.

Can I use this with any DeWalt or Milwaukee model?
It's built for the DeWalt 20V MAX and Milwaukee M18 models listed above. Check your battery and tool model numbers before ordering to confirm fit.

Do you have an adapter that works the other way — Milwaukee battery on DeWalt tools?
Yes — see the Milwaukee 18V to DeWalt Battery Adapter.

Where can I see this adapter's real-world compatibility in more detail?
Read our full breakdown: DeWalt to Milwaukee Battery Adapter: What Works, What Does Not.