The DeWalt DCB547 XR FLEXVOLT Battery features innovative 18V/54V convertible technology, providing 9.0Ah of power. This battery is fully backwards compatible with existing 18V DeWalt tools, offering extended run-time. It also provides unprecedented 54V power for heavy-duty construction applications, allowing professionals to use powerful tools without the need for mains power. The XR FLEXVOLT system eliminates compromises between portability and power, delivering high performance and long run-time. It is the worlds first convertible 18/54V battery, designed to power demanding construction equipment. Experience the full potential of cordless technology with this versatile and powerful battery.