RIDGID 18V to Ryobi 40V Battery AdapterThe RIDGID 18V to Ryobi 40V Battery Adapter (dual battery version) is designed to expand your tool compatibility and extend the life of your existing batteries. By combining the power of two RIDGID or AEG 18V batteries, you can efficiently operate most Ryobi 40V toolsno need to purchase new batteries. Built for durability and reliability, this adapter delivers stable current through pure copper contacts and a reinforced PETG body, offering outstanding