DCB546-XJ Flexvolt battery from DeWalt. The Flexvolt battery DCB546-XJ from DeWalt. Designed with revolutionary technology that changes the use of cordless tools on construction sites. The DCB546-XJ offers the world's first 54V battery for power tools that transfers the power of a wired device to the 54V wireless Flexvolt series. Properties and advantages. DCB546-XJ 54 V consists of 3 x 18 V batteries in series For best results with 3 x more power and longer operating time The full power of a wired tool, but all the freedom of a wireless compatible with XR and Flexvolt chargers Charges in a fast charger within 60 minutes. Technical data. Voltage: 18/54 V Battery: 6.0 Ah Length: 125 mm Width: 85 mm Height: 90 mm. Information about applications. Compatible with all 18V-XR and 54V-XR-Flexvolt tools from DeWalt.