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The article reviews the available solutions of range extenders with internal combustion engines designed for use in electric vehicles. The using of the on-board range extender aims to increase the range of an electric vehicle, which is still significantly limited. This fact is connected with relatively small capacity of currently used electric energy storage systems. The development of secondary cells with performances allowing the driving range of electric car to be comparable to average car with combustion engine still faces considerable difficulties. For this reason, the use of the internal combustion engine for propulsion of range extenders for electric vehicles becomes nowadays more and more popular. In this paper range extenders from the following companies are described: FEV Aachen, Kolbenschmidt Pierburg together with FEV, AVL list GmbH, Lotus Engineering with Fagor Ederlan, Mahle Powertrain Ltd. and General Motors for Chevrolet Volt / Opel Ampera. High efficiency, low exhaust emission and low noise & vibration obtained with a compact dimensions are priority in the development of these devices.