Milwaukee 18V to DeWalt 12V Battery Adapter

Use your Milwaukee M18 batteries on DeWalt 12V MAX cordless tools, without buying into a second battery platform. Your Milwaukee M18 battery is 18V where DeWalt 12V MAX tools expect 12V. A DC-DC converter inside steps it down and holds it there, so the tool never sees more than it is built for. Built with a durable injection-molded ABS housing and pure copper contacts for steady current delivery. This helps you get the most out of your existing battery system while avoiding the cost of another set of batteries and chargers. It also carries battery protection electronics (BMS) inside.

Specifications

• SKU PTA-MIL18-DWM12
• Fits this battery Milwaukee M18 (Lithium-Ion)
• Battery voltage 18V
• Runs these tools DeWalt 12V MAX (Lithium-Ion)
• Tool voltage 12V
• Housing ABS (Injected)
• Terminals Copper
• Current rating 40A continuous (80A peak at 18VDC for up to 2 seconds)432 Watt continuous at 10.8V nominal
• Weight 124 g (4.4 oz / 0.27 lb)
• Colour Black
• 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 December 17, 2023)

Why choose this adapter

• 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.

Milwaukee M18 and DeWalt 12V MAX compatibility

It works in one direction only: Milwaukee batteries powering DeWalt tools. For the opposite pairing, see adapters that run on DeWalt 12V MAX batteries.

Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the Milwaukee M18 platform and that your tool takes DeWalt 12V MAX batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge Milwaukee or DeWalt 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 Milwaukee M18 battery.

Before you buy