Stanley V20 to Ryobi 18V Battery Adapter
Use your Stanley V20 batteries on Ryobi 18V ONE+ cordless tools, without buying into a second battery platform. Constructed from durable molded ABS with pure copper contacts, for a secure fit and dependable current transfer. A practical way to extend the value of the Stanley V20 batteries you already have.
Specifications
- Fits this battery Stanley V20 (Lithium-Ion)
- Battery voltage 20V
- Runs these tools Ryobi 18V ONE+ (Lithium-Ion)
- Tool voltage 18V
- 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 131 g (4.6 oz / 0.29 lb)
- Colour Red, Green
- 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.
Stanley V20 and Ryobi 18V ONE+ compatibility
It works in one direction only: Stanley batteries powering Ryobi tools. For the opposite pairing, see adapters that run on Ryobi 18V ONE+ 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 Ryobi 18V ONE+ batteries.
Important charging and safety information
This adapter is for powering cordless tools and nothing else. It cannot charge Stanley or Ryobi 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.