The DeWalt DCM5713 is the first high power XR FlexVolt Trimmer/Brush Cutter offering the same amount of power as a petrol driven equivalent, without having to fuel and refuel the trimmer. DeWalt's Brushless motors have metal housing for increased durability and runtime, they are also highly efficient. Features No inconvenience of having to fuel. Same power as petrol driven trimmers. High in durability and efficiency. Longer runtime and life. Part of the FlexVolt XR Lithium Ion Range 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.