Patent ID: 6965518

Claim:
A power converter comprising: a casing; at least one rechargeable battery, which is disposed in an interior of the casing for supplying a DC voltage; an output socket disposing at one side of the casing and connecting to a control circuit, which comprises two primary, power terminals and at least one secondary, level-selecting terminal; a circuit board disposing at the interior of the casing, which comprises a control circuit including a feedback circuit and a DC-to-DC conversion circuit, in which the feedback circuit is coupled to the DC-to-DC conversion circuit and connected to the level-selecting terminal by at least one resistor; a level-selecting terminal device, which is engageable with the output socket and comprises two primary, power terminals and at least one secondary, level-selecting terminal, and when the level-selecting terminal device is connected to the output socket, the primary and secondary terminals of the level-selecting terminal device are respectively connected to the primary and secondary terminals of the output socket for receiving the selectable DC voltage therefrom and transmitting the selectable DC voltage through an output terminal of the level-selecting terminal device; a display device, which is disposed at a top of the casing and connected with the control circuit to display the voltage level of the DC output voltage at the output terminal of the level-selecting terminal device.