Ryobi 18V to Metabo 18V CAS Battery Adapter

Use your Ryobi 18V ONE+ batteries on Metabo CAS 18V cordless tools, without buying into a second battery platform. Power passes straight through: Ryobi 18V ONE+ and Metabo CAS 18V share the same 18V rating. Built with a durable injection-molded ABS housing and pure copper contacts for steady current delivery. Your existing batteries do more work, and there is no second ecosystem to buy into.

Specifications

• SKU PTA-RYO18-MET18
• Fits this battery Ryobi 18V ONE+ (Lithium-Ion)
• Battery voltage 18V
• Runs these tools Metabo CAS 18V (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 162 g (5.7 oz / 0.36 lb)
• Colour 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 May 1, 2024)

Why choose this adapter

• Your Ryobi 18V ONE+ battery and Metabo CAS 18V 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.

Ryobi 18V ONE+ and Metabo CAS 18V compatibility

It works in one direction only: Ryobi batteries powering Metabo CAS tools. For the opposite pairing, see adapters that run on Metabo CAS 18V 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 Metabo CAS 18V batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge Ryobi or Metabo CAS 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.

Before you buy