The DeWalt DCB547 54v XR Cordless FLEXVOLT Li-ion Battery 9Ah redefines the landscape of cordless power solutions, embodying the pinnacle of technical innovation and engineering excellence. At its core, the DCB547 features a robust 54-volt XR battery, meticulously designed to deliver unrivaled power and endurance across a wide spectrum of applications. This cutting-edge lithium-ion battery not only provides a formidable 9Ah capacity but also seamlessly transitions between 18-volt and 54-volt tools, thanks to DeWalt's innovative FLEXVOLT technology. This versatility ensures consistent performance, regardless of the tool's voltage requirements, empowering users to tackle demanding tasks with confidence and precision. The DeWalt DCB547 provides 3.0ah of capacity when used with 54v Flexvolt tools, or 9.0ah of capacity with the 18v XR range. Specifications Voltage: 18/54v Capacity: 9.0ah 18v / 3.0ah 54v Length: 125 mm Width: 85 mm Height: 90 mm.