Compatible with Dewalt 18V/20V Max Top Port Battery Converter for use with Milwaukee M18 18V cordless power tools. NOTE: The battery adapter is not compatible with high-power tools. Compatible DeWalt-Milwaukee M18 battery adapter, can be converted to DEWALT 18V-20V lithium battery, compatible with Milwaukee power tool batteries, a perfect replacement for Milwaukee 18-volt lithium battery. Helpful Tips: Cannot be used to charge power tool batteries, the adapter is only suitable without a charger. This adapter features a built-in battery lock and a protective circuit board (PCBA). This battery adapter converts to Dewalt 18V/20V Max lithium batteries, compatible with Milwaukee power tools with M18 18V batteries (not suitable for Milwaukee NICD V18 18V tools). The adapter is suitable for tools with a battery that hangs freely in an open area, but cannot be used in an enclosed area such as a flashlight. If the 18V lithium-ion battery stops working, use an adapter compatible with Dewalt 18V