This charger is compatible with DeWalt 12V MAX, 20V MAX, and FlexVolt batteries, which are commonly used in drills and screwing machines. However, it is not specifically designed for 18V batteries, as it is typically associated with DeWalt's XR Flexvolt system, which can handle voltages from 18-54V. For 18V batteries, you might need a different charger, but FlexVolt batteries can be charged using this device. Always ensure the battery type matches the charger's compatibility.