DeWALT XR Flexvolt: the world’s first 18/54V convertible battery pack system.A 54V battery that has unprecedented levels of power, finally giving you the power you need from a cordless tool. That’s not all though – it can switch itself to 18V so it is compatible with your existing 18v XR power tools, offering extended runtime meaning you don’t need to replace your existing kit – not even your 18V XR charger, as these batteries are compatible!The Flexvolt range includes a host of top-performing powerful, brushless and cordless tools powered by either a single 54V Flexvolt battery, or twin batteries to give the power of a 108V tool.This battery has the same width and length of a 18V XR battery, with only a small increase in height – so its not even going to get in your way.