Ryobi 18V to DeWalt 12V Battery Adapter

Use your Ryobi 18V ONE+ batteries on DeWalt 12V MAX cordless tools, without buying into a second battery platform. Your Ryobi 18V ONE+ battery is 18V and a DeWalt 12V MAX tool expects 12V. The converter holds the output at the tool’s level for as long as the battery lasts. The molded ABS housing keeps it light and hard-wearing, and pure copper contacts keep current delivery steady. One battery platform across more tools means less spent on batteries and less to keep charged.

Specifications

• SKU PTA-RYO18-DWM12
• Fits this battery Ryobi 18V ONE+ (Lithium-Ion)
• Battery voltage 18V
• Runs these tools DeWalt 12V MAX (Lithium-Ion)
• Tool voltage 12V
• Housing ABS (Injected)
• DC-DC converter Yes — 18V to 12V
• Terminals Copper
• Current rating 30A continuous (60A peak at 18VDC for up to 2 seconds)324 Watt continuous at 10.8V nominal
• Internal wiring 5 mm²
• Weight 114 g (4.0 oz / 0.25 lb)
• Colour Black, Green
• 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 August 21, 2026)

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 30A continuous with 60A 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.

Ryobi 18V ONE+ and DeWalt 12V MAX compatibility

It works in one direction only: Ryobi 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 Ryobi 18V ONE+ 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 Ryobi 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 Ryobi 18V ONE+ battery.

Before you buy