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Electrochemical double layer capacitors (EDLCs) and hybrid devices (HDs) become more and more popular solutions in various green energy technologies, in particu lar, in hybrid transport and wind power stations. After many years of research in EDLC and in HD technology we have developed some approaches and methods aimed at improving the performance of those devices. The results for EDLCs with the lowest inner resistance and highest power density, as well the results for HDs with the largest energy density as compared with the best similar compet ing devices are presented.