Ryobi 18V One+ to 40V Battery Adapter for Ryobi 40V Tools

This is an adapter to use two 18 volt Ryobi One+ batteries with a Ryobi 40 volt tool. This will not work with all Ryobi 40 volt tools because of the shape of how the batteries are arranged. Other tools may also have different needs for the third and/or fourth battery contact. I have only used this with the Ryobi RY40002 Expand-It powerhead (string trimmer).

**CAUTION: Be careful with the exposed wires, they are sharp and could electrocute you. **

This is a remix of my Ryobi One+ double