Amazon.com: ZDTZAN Battery Adapter MT20RNL for Makita 18V Battery to Ryobi 18V Battery, Convert for Makita 18V Battery to Ryobi 18V Lithium-ion Battery Tool Use : Tools & Home Improvement
Badaptor Makita Battery Adapter to Ryobi 18v One+ Works with Ryobi 18v One+ Tool | eBay