An information processing apparatus includes an interface and a controller. The interface performs power delivery and communication with an external apparatus. The controller performs: storing, in a memory, history information relating to power delivery performed with the external apparatus through the interface, the history information including identification information of the external apparatus and a power role of at least one of the information processing apparatus and the external apparatus, the identification information and the power role being stored in association with each other, the power role being one of a power source of supplying power and a power sink of receiving power; and in response to detecting connection of the external apparatus through the interface, determining the power role of the information processing apparatus based on the identification information of the external apparatus connected through the interface and on the history information stored in the memory.

The purpose of the present invention is to reduce the number of components of an external device to reduce the cost of the external device. The electronic device according to the present technique is provided with: a battery installed unit in which a secondary battery is installed; a charging unit for charging the secondary battery on the basis of an external input power; and a connection unit for electrically connecting an external device in which a secondary battery is installed. The secondary battery installed in the external device is charged by means of the charging unit via the connection unit.

An information processing apparatus includes a power supply switch, a display, a light-emitting unit, and a controller. The power supply switch is used to perform a control function. The display is such that a time from switching on of the power supply switch until occurrence of a screen change is long and a user is likely to fail to correctly recognize a switching-on state. The light-emitting unit is switched on in a time until the screen change occurs. The switching on is performed in such a manner that the user is notified that the power supply switch is in a switching-on state. After the controller is activated through an operation of switching on the power supply switch, the controller switches off the light-emitting unit according to a switching-off condition.

A mobile device includes a first processor, a second processor having a smaller power consumption than the first processor, and a first battery capable of supplying power to the first processor and the second processor, in which a distance between the first processor and an attachable/detachable second battery that is capable of being attached and detached and that is capable of configured to supplying power to the first processor and the second processor is longer than a distance between the second processor and the second battery.

An object of the present disclosure is to perform discharge control that suppresses deterioration in power storage performance of a power storage component by taking the state of power supply equipment into consideration. A power supply apparatus comprises: a power storage unit that stores electric charges from an external power supply; a control unit that controls charge and discharge of the power storage unit; a state determination unit that determines the power supply state of the external power supply; and a voltage detection unit that detects the voltage at the power storage unit. The control unit performs first discharge control to lower the voltage at the power storage unit to a smaller second voltage value if a predetermined time elapses since the completion of drive of a drive unit and the state determination unit determines that the power supply state is not a state of restricting power to be supplied.

An information processing apparatus includes a first wireless communication unit that establishes first wireless communication with a terminal apparatus by a first wireless communication method, a second wireless communication unit that establishes, by a second wireless communication method, third wireless communication with an access point of a wireless communication network that establishes second wireless communication with the terminal apparatus by the second wireless communication method, and a control unit that controls a mode based on whether or not driving power is supplied from a battery.

A printing system that enables a user to determine the number of sheets that a printing apparatus can print, the number of sheets corresponding to a power supply source that supplies power to the printing apparatus, in any power mode. The printing apparatus performs printing in any of a plurality of power modes including (i) a first power mode in which the printing apparatus is supplied with power from the battery, and (ii) a second power mode in which the printing apparatus is supplied with power supplied from both the battery and an external power supply. In the second power mode, the number of sheets that the printing apparatus can print is calculated based on the remaining battery level of the battery and an amount of power supplied from the external power supply.

There is provided an image reading apparatus in which a low output mode is a mode that can be controlled in a coupling state where a low power-feeding USB device is coupled, a high output mode is a mode that can be controlled in a coupling state where a high power-feeding USB device capable of feeding power higher than the low power-feeding USB device is coupled, and a control section does not perform image reading at a second reading speed faster than a first reading speed and performs image reading at the first reading speed in the low output mode.

According to a multifunction peripheral according to the present disclosure, when a DC mixing detection circuit detects that electric source power contains DC power, a DC detection signal Sdc is output from the DC mixing detection circuit. This DC detection signal Sdc is input to a solenoid of a shutoff mechanism. In response, the solenoid turns off a mechanical switch via a movable member. In addition, the DC detection signal Sdc is input to a CPU. In response, the CPU displays an error message on a display and outputs a warning sound from a speaker.

An information processing apparatus includes a processor configured to, when connected devices whose number is greater than a predetermined number are connected to the information processing apparatus, the predetermined number indicating the maximum number of devices simultaneously supplied with power, switch a power supply destination between the connected devices so as to obtain a state in which the number of connected devices simultaneously supplied with power is equal to or less than the predetermined number.