RIDGID 18V to Milwaukee 18V Battery Adapter

This adapter lets you power Milwaukee M18 cordless tools with the RIDGID 18V batteries you already own. Both platforms are rated 18V, so torque and speed on the Milwaukee M18 tool stay where they should be. The molded ABS housing keeps it light and hard-wearing, and pure copper contacts keep current delivery steady. It keeps one battery platform serving more tools, which costs less than buying into another.

Specifications

• SKU PTA-RID18-MIL18
• Fits this battery RIDGID 18V (Lithium-Ion) from Home Depot
• Battery voltage 18V
• 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 119 g (4.2 oz / 0.26 lb)
• Colour Black
• 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 October 10, 2021)

Why choose this adapter

• Your RIDGID 18V battery and Milwaukee M18 tools run at the same voltage, so the adapter changes the fitting rather than converting anything.
• 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.
• Made for the RIDGID 18V batteries sold at Home Depot, so the fit is the one you already own.
• Covered by a 12-month warranty from the day it arrives.

RIDGID 18V and Milwaukee M18 compatibility

It works in one direction only: RIDGID 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 RIDGID 18V 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 RIDGID 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 RIDGID 18V battery.

Before you buy