[IEEE 2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) - Genova, Italy (2019.6.11-2019.6.14)] 2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) - Analysis of the main battery characterization techniques and experimental comparison of commercial 18650 Li-ion cells