| 摘要 |
<p>The prevent invention provides an external battery. The external battery may include: a bear cell; a charging part which supplies external power supplied to an input terminal from a charger to the bear cell; a DC-DC conversion part which converts output voltage of the bear cell into voltages with different magnitudes, and transmits the converted voltages to an output terminal connected to an external device; and an MCU which recognizes the connection to the external device, and determines the normal connection to the external device by using the output voltage of the bear cell. According to the present invention, an external battery recognizes a misconnection to an external device, and displays the recognized information for a user. Therefore, the external device can be properly charged.</p> |
