BATTERY DEVICE

摘要

PURPOSE: A battery device is provided to unify a standard of the battery device by improving a structure of the battery to be connected to a portable device having an SD interface. CONSTITUTION: A battery device(10) includes an SD card interface portion(2) connected to a device including an SD card interface. The battery device further includes a DC/DC converter to supply a predetermined output voltage according to a program of the device including the SD card interface. The battery device further includes a controller to perform a communication operation with the device including the SD card interface. The battery device is recognized as a battery by the device including the SD card interface.