Electrical energy storage is a critical parameter in many advanced electric vehicles. Conventional batteries provide limited solution in this regard. Development of a battery compatible super-capacitor can give a good hybrid energy storage system consisting of a battery and super-capacitor. An aqueous metal oxide supercapacitor is voltage compatible with a conventional battery. Advances are required in improving both the energy and power density of this super-capacitor through a new electrode, electrolyte materials, and issues related to the construction of the device. Modeling with electrical parameters as an output and electrode/ electrolyte parameters as an input can be very effective in developing a low-cost super-capacitor. Electrode construction and material play important roles in its performance; these two aspects have been addressed in this article through a modeling approach to convert a manganese oxide-based aqueous super-capacitor into a cost-effective product. New super-capacitor structures are presented, along with capacitance and equivalent series resistance model validation, for a manganese oxide-based symmetrical aqueous supercapacitor by changing the input parameters.