SouthEle 20V to 18V Battery Adapter for Dewalt DCA1820 Work for MAX XR DCB200 DCB201 Tool - Walmart.com
Amazon.com: X-Adapter 1x Adapter for DeWalt 20v MAX XR Cordless Tools Works On Ridgid 18v (Not Advanced) Batteries- Adapter Only, Black (LQ-DW) : Tools & Home Improvement