Abstract: A power-supplying device is adapted to generate different voltage outputs, and includes an input power providing unit for providing an input power signal, a selector unit operable so as to generate a voltage select signal corresponding to a selected one of the voltage outputs, a processor unit connected to the selector unit so as to receive the voltage select signal therefrom and so as to generate a converter control signal corresponding to the voltage select signal, and an adjustable dc-to-dc converter connected to the input power providing unit and the processor unit so as to receive the input power signal and the converter control signal respectively therefrom. The converter is controlled by the converter control signal so as to process the input power signal in order to generate the selected one of the voltage outputs.

Abstract: A power converting device is adapted for use with a battery pack. The power converting device includes a housing formed with a battery receiving space that is adapted for receiving the battery pack therein, a battery connector mounted on the housing inside the receiving space and adapted to be connected electrically with the battery pack when the battery pack is disposed inside the battery receiving space, at least two output connectors mounted on the housing and accessible from an exterior of the housing, and a power converting circuit mounted inside the housing and connected electrically to the battery connector and the output connectors. The power converting circuit is adapted to be connected electrically to the battery pack via the battery connector, and is adapted to convert electrical power of the battery pack into at least two voltage outputs that can be tapped at the output connectors, respectively.