Abstract: A mobile optical scanning device is proposed, which includes a power supply module, a contact image sensor (CIS) module, an application specific integrated circuit (ASIC) and a memory module. The power supply module acts as a power source for the scanning device. The scanning process can be activated by inputting a signal to the ASIC for activating a driving unit of the CIS module for scanning. Analog data obtained from scanning are then converted to digital data by a signal processing unit of the CIS module, then allowing the digital data to be stored in the memory module. With the use of an input/output processing module of the ASIC being connected with an external host, the stored data in the memory module can be read. Since the scanning device is provided with the power source and memory, it can be used for scanning and storing data even in the condition of no hose being connected therewith.

Abstract: A mobile device for power supply and data storage is proposed, which includes a power supply module, an input/output interface module, a controlling module and a memory module. When the foregoing mobile device is externally connected with a small mobile electric device, power outputted from an output circuit of the power supply module to the electric device can be adjusted by the controlling module, so as to provide a suitable amount of power for the electric device. Moreover, when data storage of the electric device is insufficient for storing further data, the controlling module allows a write in/read out unit of the input/output interface module to write in the data, and then transmits the data to the memory module to be stored therein.