In the development of film capacitors, some objective characteristics have been traditionally used. In this study, the charging/discharging characteristic was used as the function of capacitors. In order to observe the charging/discharging characteristic under electrically stressed conditions, both direct current and alternating current were charged in the experiment. As a result, the SN ratio was improved by 13.1 db and the conclusions were well reproduced. It was also concluded that the objective characteristics will be improved and that this appropriate for evaluation.