DeWalt 20V to Stanley V20 Battery Adapter

Use your DeWalt 20V MAX batteries on Stanley V20 cordless tools, without buying into a second battery platform. Power passes straight through: DeWalt 20V MAX and Stanley V20 share the same 20V rating. Built with a durable injection-molded ABS housing and pure copper contacts for steady current delivery. A practical way to extend the value of the DeWalt 20V MAX batteries you already have.

Specifications

• SKU PTA-DWM20-STAV20
• Fits this battery DeWalt 20V MAX (Lithium-Ion)
• Battery voltage 20V
• Runs these tools Stanley V20 (Lithium-Ion)
• Tool voltage 20V
• 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 78 g (2.8 oz / 0.17 lb)
• Dimensions (L × W × H) 111 × 61 × 38 mm (4.37 × 2.4 × 1.5 in)
• Colour 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 DeWalt 20V MAX battery and Stanley V20 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.
• Covered by a 12-month warranty from the day it arrives.

DeWalt 20V MAX and Stanley V20 compatibility

It works in one direction only: DeWalt batteries powering Stanley tools. For the opposite pairing, see adapters that run on Stanley V20 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 Stanley V20 batteries.

Important charging and safety information

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