A power device having high electricity storage performance capacitor is disclosed, which may include a least one high electricity storage performance capacitor, a balancing circuit and at least one Lithium battery. The balancing circuit may be electrically connected between the high electricity storage performance capacitor and the Lithium battery; the high electricity storage performance capacitor may include a capacitor substrate and a plurality of nanometer particles; the nanometer particles may irregularly stack over the surface of the capacitor substrate and there are gaps forming between the nanometer particles to obtain higher specific surface area; in this way, the high electricity storage performance capacitor can attract more negative and positive ions of the electrolytic solution to increase the electricity energy stored in the capacitor. Therefore, the balancing circuit can transmit the electricity energy in the high electricity storage performance capacitor to the Lithium battery to quickly charge the Lithium battery.