Abstract: According to one embodiment, an electronic apparatus includes a housing, a circuit board arranged in the housing, a screw-receiving member having a threaded hole and mounted on the circuit board, a mounted component mounted on the circuit board and screw-attached to the screw-receiving member, and a support rib provided on an inner surface of the housing, configured to contact with the circuit board near the threaded hole and to support the circuit board.

Abstract: An electronic apparatus that includes a housing, a holder provided in the housing and a light-emitting portion provided in the housing. The holder is made of a resin and supports components. The holder includes an optical guide that guides light emitted from the light-emitting portion to outside of the housing, and the optical guide is formed integral with the holder.

Abstract: An electronic apparatus that includes a housing, a holder provided in the housing and a light-emitting portion provided in the housing. The holder is made of a resin and supports components. The holder includes an optical guide that guides light emitted from the light-emitting portion to outside of the housing, and the optical guide is formed integral with the holder.

Abstract: An apparatus and method for controlling a battery power source of an electronic device by resetting battery information stored in a memory. In addition, the battery is discharged until a battery voltage reaches a prescribed discharge end voltage, even when the power source supply to the device is switched from the battery to another source. The battery information includes a realizable capacity and a residual capacity of the battery. The realizable capacity is a parameter used for indicating a battery performance and the residual capacity is used for calculating a usable residual time of the device.

Abstract: A battery charge circuit using a constant voltage/constant current to power charge a plurality of battery packs, a current detection circuit to detect a charge current according to a predetermined value, and control mechanisms to maintain a constant voltage charge mode when the charge current value drops below a set value within the battery pack.

Abstract: In a battery-driven portable computer, a battery pack is constituted by m battery sets connected in series each including n lithium-ion secondary battery cells connected in parallel. A voltage monitor for monitoring the voltage of the terminal electrode of each battery set and a charger for independently appropriately charging each battery set in accordance with a monitor result are arranged, thereby realizing battery driving by a lithium-ion secondary battery pack having a large capacity. A computer system monitors the voltages of the battery cells which are part of a secondary battery by comparing the battery voltages with a predetermined voltage value in order to detect overdischarge (undervoltage) or overcharge (overvoltage), outputs this information outside of the battery pack, and terminates processing prior to a circuit disconnect.

Abstract: A system comprises a rechargeable battery charged with a constant voltage and a charger. The battery includes a storage unit storing identification data and control voltage data and the charger is assigned identification data. The charger reads the identification data from the storage unit and charges the battery in accordance with the control voltage data, if the stored identification data coincides with the assigned charger identification data. If the stored identification data does not coincide with the assigned charger identification data, the charger gradually increases a charge voltage while detecting overvoltage of the battery, calculates a control voltage of the charger, and charges the battery in accordance with the calculated control voltage.

Abstract: A system comprises a rechargeable battery charged with a constant voltage and a charger. The battery includes a storage unit storing charge voltage data. The charger reads the charge voltage data from the storage unit and charges the battery in accordance with the read charge voltage data. In one aspect, the charger is assigned identification data to identify the charger and charge the battery. In another aspect, a charge controller includes a full-charge detecting means for detecting that the battery is fully charged based upon current measured from the battery.