DEWALT’s 20V MAX* battery adapter works with most DEWALT 18V tools. The adapter is a solution for professionals who are heavily invested in the DEWALT 18V system of tools, allowing most of the company’s 18V tools to operate off the advanced lithium ion battery technology. The adapter is packaged as a standalone unit and as a combo with two compact 20V MAX* 2.0Ah batteries and a charger.