Currently, electric cars enjoy a major interest among users and potential buyers. As a result, the offer of manufacturers has become very varied and generally adapted to the needs of customers. The major challenge for these manufacturers is the range between two successive charges of the traction battery. This parameter plays a decisive role when purchasing a certain type of electric vehicle. At this moment, an autonomy that fully satisfies reasonable mobility needs has not been reached. According to the regulations applicable at international level, the autonomy of an electric vehicle is determined in laboratory conditions following certain test cycles. Unfortunately, laboratory tests cannot faithfully reproduce real operating conditions. Considering these aspects, the authors developed experimental research in urban driving conditions intended to identify the concrete causes of reduction of the state of charge (SOC) of the traction battery during the journey. In the first part of the paper, are presented the particularities of the test, the specific technical data of electric vehicle tested and the details regarding the acquisition of experimental data from the vehicle. The fundamental goal pursued was to highlight the parameters that define the state of charge of the traction battery. In the second part of the paper, the results of the experimental research are presented and interpreted. Also, are established conclusions regarding the decreasing of the state of charge from the traction battery and the circumstances under which it occurred. At the same time, specific measures are proposed to improve the overall autonomy of such a vehicle.