Ryobi 18V to Stanley V20 Battery Adapter

Use your Ryobi 18V ONE+ batteries on Stanley V20 cordless tools, without buying into a second battery platform. The molded ABS housing keeps it light and hard-wearing, and pure copper contacts keep current delivery steady. Your existing batteries do more work, and there is no second ecosystem to buy into.

Specifications

• SKU PTA-RYO18-STAV20
• Fits this battery Ryobi 18V ONE+ (Lithium-Ion)
• Battery voltage 18V
• 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 236 g (8.3 oz / 0.52 lb)
• Colour Green, Black
• 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

• 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.

Ryobi 18V ONE+ and Stanley V20 compatibility

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