18vMakita Adapter To DeWalt 18V 20V Battery Adapter Makita Battery Ada – CrossFirePower
Amazon.com: Battery Adapter for Makita DCA1820 18V Compatible with Makita Lithium Battery to DeWalt CA1820 18V DC9180 DC9096 Tool Use : Tools & Home Improvement
Makita 18V Slider Li-ion Battery Convert to DEWALT 20V(Max) Power Tools Adapter | eBay