General description The DeWalt DCB547 18V/54V XR FLEXVOLT 9.0Ah Li-Ion Battery is a groundbreaking power tool battery pack, recognized as the world's first convertible battery. This innovative battery is designed to provide exceptional power and versatility, making it compatible with both 18V XR and 54V XR Flexvolt tools. Technical specifications Voltage: 18V / 54V Battery Capacity: 9.0Ah Compatibility and accessories Compatible with all 18V XR tools Compatible with 54V XR Flexvolt tools Usage On a new XR Flexvolt powertool, the battery voltage steps up to deliver superior performance. When used with traditional XR powertools, the XR Flexvolt battery operates at 18V, providing extended runtime. Can run two batteries simultaneously for a total of 108V in super-powered Flexvolt cordless kits.