一种集线器，与位于外部环境的一电子设备与至少一行动设备电性连接。集线器包括一第一连接端、至少一第二连接端、一控制器、与一第一直流转换器。第一连接端适于电性连接至该电子设备，第二连接端适于电性连接至该行动设备。控制器电性连接于电子设备与行动设备之间，且控制器适于与行动设备互相传输信号。另外，控制器还适于发送一信号至行动设备，使行动设备启动快速充电模式。第一直流转换器之一输入端电性连接至电子设备，而输出端电性连接至行动设备，第一直流转换器是用于输出稳定的电压至行动设备。

A hub electrically connected to an electronic equipment and at least a portable device located in external environment is provided. The hub includes a first connector, at least a second connector, a controller, and a first DC/DC converter. The first connector is electrically connected to the electronic equipment, the second connector is electrically connected to the portable device. The controller is electrically connected between the electronic equipment and the portable device, and the controller has a signal transmission with the portable device mutually. In addition, a signal is transmitted to the portable device suitably by the controller so that the portable device being with rapid charge mode. An input terminal of the first DC/DC converter is electrically connected to the electronic equipment, and a output terminal of the first DC/DC converter is electrically connected to the portable device, the first DC/DC converter is applied to output stable voltage to the portable device.