An electronic apparatus including a power supply circuit and an electronic apparatus body is provided. The power supply circuit includes a power input port, a first power circuit, a battery module, a reset circuit and a second power circuit. The power input port receives an input power. The first power circuit converts the input power and outputs a first power to charge the battery module. The reset circuit generates a reset pulse signal responding to that the input power starts to be provided. The battery module is controlled by the first power circuit to provide the first power to the second power circuit if the input power is not provided. The second power circuit converts the first power, accordingly provides an output voltage signal to the electronic apparatus body, and resets the electronic apparatus body by disabling the output voltage signal responding to the reset pulse signal.