NOVELTY - The charge storage device e.g. an asymmetrical supercapacitor is provided with a pair of electrodes. Each electrode is operable to store electric charge. Each electrode has respective capacitances Cp, CN that are different from each other, where the ratio of the capacitances CP/CN is formed to be greater than 1. An operating voltage of at least one of the electrodes is dependent on the ratio of the capacitances. One of the electrodes comprises a nano-composite material which is a composite of carbon nano-tubes and polyaniline.    USE - Charge storage device such as asymmetrical supercapacitor used in electrical apparatus (all claimed). Can also be used in asymmetrical electrochemical devices, such as fuel cells and batteries etc.    ADVANTAGE - The improved capacitor that has an enhanced energy capacity and improved storage performance and which also permits a low cost design and fabrication/manufacturing strategy is provided. Since the ratio of the capacitances of the electrodes is greater than 1, the cell voltage of the device is allowed to be extended or increased, so that the energy capacity and power capability of the device are enhanced. Thus by unequalzing the capacitances of the electrodes, as a result of increasing the ratio of the electrode capacitances, the cell voltage can be markedly increased leading to a greater specific energy capacity for the device. The charge storage device provides an effective technique to extend the cell voltage of asymmetrical supercapacitors. Thus by increasing the relative capacitance of the electrodes, the energy capacity and power capability of asymmetrical supercapacitors can be significantly enhanced.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) electrical apparatus; and    (2) method for manufacturing charge storage device.    DESCRIPTION OF DRAWING(S) - The drawing shows the graphical representation illustrating the percentage specific energy change as a function of changing CP/CN ratio.