RIDGID 18V to Metabo 18V CAS Battery Adapter

Use your RIDGID 18V batteries on Metabo CAS 18V cordless tools, without buying into a second battery platform. Voltage is not the obstacle here — both sides are 18V. The socket is, and that is what this solves. Constructed from 3D-printed ABS with pure copper contacts, for an accurate fit and dependable current transfer. It is a cost-effective way to get more from the batteries you have, with no second charger to maintain.

Specifications

• SKU PTA-RID18-MET18
• Fits this battery RIDGID 18V (Lithium-Ion) from Home Depot
• Battery voltage 18V
• Runs these tools Metabo CAS 18V (Lithium-Ion)
• Tool voltage 18V
• 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 78 g (2.8 oz / 0.17 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 August 20, 2026)

Why choose this adapter

• Your RIDGID 18V battery and Metabo CAS 18V 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.
• Made for the RIDGID 18V batteries sold at Home Depot, so the fit is the one you already own.
• Covered by a 12-month warranty from the day it arrives.

RIDGID 18V and Metabo CAS 18V compatibility

It works in one direction only: RIDGID 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 RIDGID 18V 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 RIDGID 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 RIDGID 18V battery.

Before you buy