Stanley V20 to DeWalt 20V Battery Adapter

Use your Stanley V20 batteries on DeWalt 20V MAX cordless tools, without buying into a second battery platform. Voltage is not the obstacle here — both sides are 20V. The socket is, and that is what this solves. The 3D-printed ABS housing keeps the fit precise, and pure copper contacts keep current delivery steady. It removes the need to keep separate batteries for different platforms, which saves money and simplifies the workflow.

Specifications

• Fits this battery Stanley V20 (Lithium-Ion)
• Battery voltage 20V
• Runs these tools DeWalt 20V MAX (Lithium-Ion)
• Tool voltage 20V
• Housing ABS (3D)
• 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 76 g (2.7 oz / 0.17 lb)
• Dimensions (L × W × H) 111 × 60 × 41 mm (4.37 × 2.36 × 1.61 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 October 5, 2025)

Why choose this adapter

• Your Stanley V20 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.
• Covered by a 12-month warranty from the day it arrives.

Stanley V20 and DeWalt 20V MAX compatibility

It works in one direction only: Stanley 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 Stanley V20 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 Stanley 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 Stanley V20 battery.

Before you buy