Masterforce 20V to DeWalt 20V Battery Adapter

Use your Masterforce 20V batteries on DeWalt 20V MAX cordless tools, without buying into a second battery platform. Both run at 20V, so the adapter changes the fitting and not the voltage. Injection-molded ABS on the battery side, precision 3D-printed ABS on the tool side, and pure copper contacts for steady current delivery. It keeps one battery platform serving more tools, which costs less than buying into another.

Specifications

• SKU PTA-MAS20-DWM20
• Fits this battery Masterforce 20V (Lithium-Ion) from Menards
• Battery voltage 20V
• Runs these tools DeWalt 20V MAX (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 129 g (4.6 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
• What's in the box Battery adapter
• Warranty 12 months after the date of delivery
• Revision Revision 01 (released on May 21, 2026)

Why choose this adapter

• Your Masterforce 20V battery and DeWalt 20V MAX tools run at the same voltage, so the adapter changes the fitting rather than converting anything.
• 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 Masterforce 20V batteries sold at Menards, so the fit is the one you already own.
• Covered by a 12-month warranty from the day it arrives.

Masterforce 20V and DeWalt 20V MAX compatibility

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

Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the Masterforce 20V platform and that your tool takes DeWalt 20V MAX batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge Masterforce 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 Masterforce 20V battery.

Before you buy