DeWalt 20V to Milwaukee 18V Battery Adapter
This adapter lets you power Milwaukee M18 cordless tools with the DeWalt 20V MAX batteries you already own. 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.
Specifications
- SKU PTA-DWM20-MIL18
- Fits this battery DeWalt 20V MAX (Lithium-Ion)
- Battery voltage 20V
- Runs these tools Milwaukee M18 (Lithium-Ion)
- Tool voltage 18V
- Housing ABS (Injected)
- Terminals Copper
- Current rating 40A continuous (80A peak at 18VDC for up to 2 seconds)720 Watt continuous at 18V nominal
- Internal wiring 5 mm²
- Weight 101 g (3.6 oz / 0.22 lb)
- Dimensions (L × W × H) 111 × 75 × 49 mm (4.37 × 2.95 × 1.93 in)
- Colour Yellow, Red
- Operating humidity 5–95% RH
- Operating temperature -10 °C to 50 °C (14 °F to 122 °F)
- USB port No
- What's in the box Battery Adapter
- Warranty 12 months after the date of delivery
- Revision Revision 01 (released on September 28, 2021)
Why choose this adapter
- 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.
- 5 mm² internal wiring, 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 20V MAX and Milwaukee M18 compatibility
It works in one direction only: DeWalt batteries powering Milwaukee tools. For the opposite pairing, see adapters that run on Milwaukee M18 batteries.
Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the DeWalt 20V MAX platform and that your tool takes Milwaukee M18 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 20V MAX battery.