DeWalt 20V to WEN 20V Battery Adapter

Use your DeWalt 20V MAX batteries on WEN 20V cordless tools, without buying into a second battery platform. Both run at 20V, so the adapter changes the fitting and not the voltage. The battery side is injection-molded ABS and the tool interface is high-precision 3D-printed ABS for an accurate fit, with pure copper contacts carrying the current. One battery platform across more tools means less spent on batteries and less to keep charged. It also carries battery protection electronics (BMS) inside.

Specifications

• SKU PTA-DWM20-WEN20
• Fits this battery DeWalt 20V MAX (Lithium-Ion)
• Battery voltage 20V
• Runs these tools WEN 20V (Lithium-Ion)
• Tool voltage 20V
• Housing ABS
• 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 126 g (4.4 oz / 0.28 lb)
• Colour Black, Yellow
• 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 17, 2025)

Why choose this adapter

• Your DeWalt 20V MAX battery and WEN 20V 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.
• 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 WEN 20V compatibility

It works in one direction only: DeWalt batteries powering WEN tools. For the opposite pairing, see adapters that run on WEN 20V 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 WEN 20V batteries.

Important charging and safety information

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