The DEWALT XR FlexVolt Slide Li-ion Battery stands at the forefront of cordless technology. The world's first convertible 18/54V battery, offering unprecedented levels of power. Provides the unique ability to power heavy-duty construction power tools whilst still being compatible with existing DEWALT XR 18V products and offering increased run time. It offers users increased run time, over any of the 18V XR 4.0Ah or 5.0Ah Li-ion batteries. Compared with 240v and 110v power tools even the most efficient cordless system provided a compromise between increased portability and reduced power, between greater ease-of-use and reduced run-time. DEWALT have recognised the frustrations these limitations cause the trade and engineered the DEWALT XR FLEXVOLT system to eliminate any and all restrictions, providing a 54v/18v cordless system that offers zero compromises. DEWALT XR FLEXVOLT DCB547 Batteries have the dual advantage of unbeatable run-time in all existing 18v DEWALT Power Tools as well as the power necessary to access applications completely unheard of for cordless technology. With this innovation DEWALT have finally unlocked the full potential of cordless and now possess the unique ability to power even heavy duty construction power tools using nothing but a cordless battery What is Dewalt XR Flex volt XR FLEXVOLT is a range of 54V power tools that offer runtime and performance which has never been seen before - for the first time, professionnal tradesmen can reliably undertake heavy-duty construction applications without the need for mains power. This innovation means that you can have 54V power across a whole range of tools without the inconvenience of a cable. DEWALT XR FLEXVOLT is the only battery on the market that can switch from 54V to 18V, making it backward-compatible with your existing XR powertools. Reasons to Switch to Dewalt XR Flexvolt Dewalt XR FLEXVOLT battery stands at the forefront of cordless technology Worlds first conve