In order to select the right supercapacitor for an application there are four basic parameters that need to be provided. Normal operating voltage, Minimum operating voltage, Average current, and Duration of pulse or hold-up time. These four basic parameters will provide enough detail to size a supercapacitor with the formulas that will be presented later in detail. Using the additional criteria of operating temperature range and life allows for changes in the capacitor parameters over time and ensures sufficient design margin and optimize the capacitor selection.