Abstract: According to one embodiment, an electric power supply system includes a processor, a power circuit and an embedded controller. The processor includes a first controller configured to modify an operating frequency of the processor and a second controller configured to modify an operating power of the processor. The power circuit and the embedded controller detect a presence or an absence of a battery in parallel. The power circuit instructs the first controller to modify the operating frequency when removal of the battery is detected. The embedded controller causes the second controller to modify the operating power via a Basic Input/Output System (BIOS) when the removal of the battery is detected, and causes the first controller to stop modify the operating power via the power circuit.

Abstract: According to one embodiment, an electric power supply system includes a processor, a power circuit and an embedded controller. The processor includes a first controller configured to modify an operating frequency of the processor and a second controller configured to modify an operating power of the processor. The power circuit and the embedded controller detect a presence or an absence of a battery in parallel. The power circuit instructs the first controller to modify the operating frequency when removal of the battery is detected. The embedded controller causes the second controller to modify the operating power via a Basic Input/Output System (BIOS) when the removal of the battery is detected, and causes the first controller to stop modify the operating power via the power circuit.

Abstract: According to one embodiment, an electric power supply system includes a processor, a power circuit and an embedded controller. The processor includes a first controller configured to modify an operating frequency of the processor and a second controller configured to modify an operating power of the processor. The power circuit and the embedded controller detect a presence or an absence of a battery in parallel. The power circuit instructs the first controller to modify the operating frequency when removal of the battery is detected. The embedded controller causes the second controller to modify the operating power via a Basic Input/Output System (BIOS) when the removal of the battery is detected, and causes the first controller to stop modify the operating power via the power circuit.

Abstract: According to one embodiment, an electric power supply system includes a processor, a power circuit and an embedded controller. The processor includes a first controller configured to modify an operating frequency of the processor and a second controller configured to modify an operating power of the processor. The power circuit and the embedded controller detect a presence or an absence of a battery in parallel. The power circuit instructs the first controller to modify the operating frequency when removal of the battery is detected. The embedded controller causes the second controller to modify the operating power via a Basic Input/Output System (BIOS) when the removal of the battery is detected, and causes the first controller to stop modify the operating power via the power circuit.

Abstract: According to one embodiment, an electric power supply system includes a processor, a power circuit and an embedded controller. The processor includes a first controller configured to modify an operating frequency of the processor and a second controller configured to modify an operating power of the processor. The power circuit and the embedded controller detect a presence or an absence of a battery in parallel. The power circuit instructs the first controller to modify the operating frequency when removal of the battery is detected. The embedded controller causes the second controller to modify the operating power via a Basic Input/Output System (BIOS) when the removal of the battery is detected, and causes the first controller to stop modify the operating power via the power circuit.

Abstract: According to one embodiment, an electronic device includes: an interface capable of being connected with outside to supply/receive power to/from a first electronic device; a determining processor configured to determine whether the first electronic device supports a switching function based on first information acquired from the first electronic device when the first electronic device is connected to the interface, the switching function being a function to switch whether the first electronic device serves as a source to supply power or serves a sink to receive power; an operational input receiver configured to receive operational input from a user to the electronic device; and a switching processor configured to switch whether the electronic device serves as the source or serves as the sink in accordance with the operational input when the first electronic device is determined to support the switching function.

Abstract: On embodiment provides an electronic apparatus including: a controller configured to perform a power management of the electronic apparatus; a battery capable of counting cycles of a charging; and a charge circuit configured to perform the charging to the battery by using DC power supplied from an AC power supply device, wherein the controller is configured to cause the charge circuit to step down a charge voltage of the battery every predetermined number of the counts.

Abstract: An electronic apparatus includes an expansion unit having a battery. The electronic apparatus includes a controller and a display. The controller performs power management of the battery. The display displays a residual capacity of the battery. The controller controls the display such that the display performs pattern display based on the residual capacity.

Abstract: On embodiment relates to an electronic apparatus, including a component configured to receive a power supply as a load; first and second battery drivers configured to manage charging and discharging of first and second batteries and cause them to perform the power supply to the load, respectively; and a controller configured to, upon detection of elapse of a predetermined period from when the first battery is brought into a fully-charged condition, prohibit the power supply to the load from the second battery or a power supply to the load from an external power source, and permit the power supply to the load from the first battery, until a remaining amount of the first battery falls below a predetermined value.

Abstract: An electronic apparatus includes an expansion unit having a battery. The electronic apparatus includes a controller and a display. The controller performs power management of the battery. The display displays a residual capacity of the battery. The controller controls the display such that the display performs pattern display based on the residual capacity.

Abstract: On embodiment provides an electronic apparatus including: a controller configured to perform a power management of the electronic apparatus; a battery capable of counting cycles of a charging; and a charge circuit configured to perform the charging to the battery by using DC power supplied from an AC power supply device, wherein the controller is configured to cause the charge circuit to step down a charge voltage of the battery every predetermined number of the counts.

Abstract: According to one embodiment, an information processing apparatus, includes a power management controller configured to perform power management of the apparatus, a power supply circuit configured to supply an operational power to components of the apparatus using power supplied from a rechargeable battery, and a power supply controller configured to control the circuit in response to a request from the power management controller. The power supply controller is coupled to two or more switches, and is configured to cause the power management controller to execute an initialization process in response to a first operation of the two or more switches.

Abstract: According to one embodiment, an electronic apparatus includes a measurement module configured to measure power of a secondary battery, a comparator configured to compare the measured power with a first threshold and with a second threshold smaller than the first threshold, and a controller configured to, when the electronic apparatus is driven by the secondary battery, operate the electronic apparatus in any one of a first power range, second power range, and third power range based on the comparison. The first power range requires greater power than power required in the second power range, and the second power range requires greater power than power required in the third power range.

Abstract: According to one embodiment, an electronic device includes a controller and a charging circuit. The controller is configured to perform power management of the electronic device. The controller is configured to detect that a battery is in an overvoltage state if conditions that the battery is being charged, a charging current value of the battery acquired from a first IC is not greater than a first threshold, and power usable by the charging circuit to charge the battery is unrestricted are satisfied, and to stop charging of the battery by a charging circuit in response to detection of the overvoltage state of the battery.

Abstract: According to one embodiment, an information processing apparatus includes a main body includes a battery, a display unit, a button switch, a sensor, a power management controller, a power supply circuit, and a power supply controller. The button switch is assigned with a first function. The sensor senses a closed state of the display unit. The power supply circuit supplies operation power to respective components in the information processing apparatus using power supplied from the battery. The power supply controller transmits a reset signal to the power management controller to cause the power management controller to execute initialization processing, if the button switch is pressed and the sensor senses the closed state of the display unit.

Abstract: According to one embodiment, an information processing apparatus, includes a power management controller configured to perform power management of the apparatus, a power supply circuit configured to supply an operational power to components of the apparatus using power supplied from a rechargeable battery, and a power supply controller configured to control the circuit in response to a request from the power management controller. The power supply controller is coupled to two or more switches, and is configured to cause the power management controller to execute an initialization process in response to a first operation of the two or more switches.

Abstract: According to one embodiment, an information processing apparatus includes a main body, a heating device provided in the main body, a cooling fan provided in the main body, which cools the heating device, a temperature sensor provided in the main body, which senses a temperature of the heating device, and a fan control unit provided in the main body, which rotates the cooling fan at a first rotation speed or higher during power-on of the main body and switches a rotation speed of the cooling fan to a second rotation speed which is higher than the first rotation speed when the temperature of the heating device sensed by the temperature sensor reaches a given threshold value.

Abstract: According to one embodiment, an information processing apparatus, includes a power consumption reading unit configured to read information corresponding to power consumption of a system, a temperature reading unit configured to read a temperature of the processor, a first storage unit configured to store power consumption P1 and a temperature T1, a load unit configured to impose a load on the processor, a second storage unit which stores power consumption P2 and a temperature T2 after the load is imposed, a calculation unit which calculates cooling performance ?T from the power consumption P1 and the temperature T1 and the power consumption P2 and the temperature T2, and a reporting unit configured to report that the cooling performance of the system has deteriorated when the cooling performance value is higher than a setting value.

Abstract: According to one embodiment, an information processing apparatus includes a main body, a heating device provided in the main body, a cooling fan provided in the main body, which cools the heating device, and a fan control unit provided in the main body, which supplies the cooling fan with a control signal having a first value for rotating the cooling fan at a given rotation speed that is higher than a target rotation speed, and which supplies the cooling fan with a control signal having a second value for rotating the cooling fan at the target rotation speed when a rotation speed of the cooling fan reaches a given rotation speed which is lower than the target rotation speed and which allows the cooling fan to rotate at a constant speed.

Abstract: According to one embodiment, an information processing apparatus includes a main body, a heating device provided in the main body, a cooling fan provided in the main body, which cools the heating device, a temperature sensor provided in the main body, which senses a temperature of the heating device, and a fan control unit provided in the main body, which rotates the cooling fan at a first rotation speed or higher during power-on of the main body and switches a rotation speed of the cooling fan to a second rotation speed which is higher than the first rotation speed when the temperature of the heating device sensed by the temperature sensor reaches a given threshold value.