A portable device is provided that functions as a wireless key for a door and operates on a secondary battery. The portable device includes a wireless communicator for performing wireless communication with a system that controls a lock state of the door, ...

Provided is a power consumption suppressing device for electronic key terminals capable of effectively suppressing electronic key terminal power consumption. An electronic key terminal (200) comprises a charge state detection unit (210) to specify a chargi...

During charging of a mobile device by a charging coil, a charge controller acquires information of the seating position of the owner of the mobile device, through a short-range wireless communicating section, and therefore issues an alarm when a person who...

A battery holder (10) includes a terminal component (20) electrically connected to one electrode of a battery (15) and a battery restraining part (53) that is separate from the terminal component (20). The terminal component includes: a fixed portion (21) ...

A remote control system includes transmission means (11) which a driver can carry, the transmission means having a battery (D) and an operation section (b) which the driver can operate, the transmission means configured to transmit an operation signal in r...

A battery-operated remote control (2) uses key controls to transmit signals to a receiver (8) in a control device (7) on board a motor vehicle. A monitoring device (11) checks the charging status of a battery (3), which is shown on a display panel (13).