Designed to automatically switch between 54V and 18V, this versatile battery delivers unprecedented performance in the same size as the previous 9Ah model. It features a built-in LED fuel gauge for easy monitoring of charge status and includes protection against overheating, overload, and deep discharge to enhance battery life. The DCB548-XJ is compatible with all XR FLEXVOLT and 18V XR tools and chargers, making it an ideal choice for professionals seeking extended runtime and reliability on demanding job sites.