2 x DEWALT DCB547 18V/ 54V XR FLEXVOLT 9.0Ah battery + DCB118 fast charger stock code: dcb547x2_dcb118this package includes 2 x DEWALT DCB547 18V/ 54V XR FLEXVOLT 9.0Ah battery and DCB118 fast chargerdewalt DCB547 FLEXVOLT battery XR technology fully convertible 18/54V DEWALT battery backwards compatible with existing 18V DEWALT products, yet with the option to amplify voltage to an unprecedented 54V x 9Ah great for use on larger more powerful construction power tools.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, professional 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 power tools.