DeWalt 12V to Milwaukee 12V Battery Adapter

Use your DeWalt 12V MAX batteries on Milwaukee M12 cordless tools, without buying into a second battery platform. Your DeWalt 12V MAX battery is 12V and a Milwaukee M12 tool expects 12V. The converter holds the output at the tool’s level for as long as the battery lasts. Constructed from durable molded ABS with pure copper contacts, for a secure fit and dependable current transfer. A practical way to extend the value of the DeWalt 12V MAX batteries you already have. It also carries battery protection electronics (BMS) inside.

Specifications

• SKU PTA-DWM12-MIL12
• Fits this battery DeWalt 12V MAX (Lithium-Ion)
• Battery voltage 12V
• Runs these tools Milwaukee M12 (Lithium-Ion)
• Tool voltage 12V
• Housing ABS (Injected)
• DC-DC converter Yes — 12V to 12V
• Terminals Copper
• Current rating 40A continuous (80A peak at 18VDC for up to 2 seconds)432 Watt continuous at 10.8V nominal
• Weight 143 g (5.0 oz / 0.32 lb)
• Colour Black, Red
• Operating humidity 5–95% RH
• Operating temperature -10 °C to 50 °C (14 °F to 122 °F)
• USB port No
• Built-in BMS protection Yes
• What's in the box Battery Adapter
• Warranty 12 months after the date of delivery
• Revision Revision 01 (released on August 11, 2026)

Why choose this adapter

• Your DeWalt 12V MAX battery and Milwaukee M12 tools run at the same voltage, so the adapter changes the fitting rather than converting anything.
• A Battery Management System inside the adapter cuts power before the battery is drained too far — protection your battery may not have on its own.
• Injection-moulded ABS, not 3D printed — no layer lines to split under load.
• Solid copper terminals, so less of the current is lost as heat.
• Rated for 40A continuous with 80A peak at 18VDC for up to 2 seconds, so a high-draw tool is not held back by the adapter.
• Covered by a 12-month warranty from the day it arrives.

DeWalt 12V MAX and Milwaukee M12 compatibility

It works in one direction only: DeWalt batteries powering Milwaukee tools. For the opposite pairing, see adapters that run on Milwaukee M12 batteries.

Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the DeWalt 12V MAX platform and that your tool takes Milwaukee M12 batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge DeWalt or Milwaukee batteries and must never be connected to a charger of any kind. Always take the battery out of the adapter before charging, and charge it on the original charger made for your DeWalt 12V MAX battery.