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Making transportation systems more energy efficient is one of the key challenge in this century. This paper presents a solution for increasing the efficiency of an electrical scooter by adding a supercapacitive energy storage in parallel to the original batteries. This paper focuses on the DC/DC converter that must be implemented to connect the supercapacitors to the batteries in the system. The researched converter needs to be as light and as small as possible with an efficiency as high as possible. The converter topology is based on interleaved channels operating in intermittent mode and usage of the reverse conduction of the power mosfets.