An electric power unit (10) selectable and usable for a plurality of electric sources (20a..20n), including an electric source-discriminating device (12) to detect attached electric sources of the plurality of electric sources, an electric source-selecting...

A parallel monitor circuit (1A) for monitoring one (C1) of serially connected plural capacitors (Cn) receiving a direct recharging current is disclosed. The circuit comprises a bypassing transistor (Q1) for bypassing the capacitor (C1) with the recharging ...

A semiconductor apparatus including: multiple parallel monitor circuits each configured to control charge to a capacitor by controlling a transistor that bypasses, if the voltage of the capacitor exceeds a predetermined reference voltage, charge current pr...

A battery contact mechanism urging a battery in a direction of one electrode of the battery by making pressure contact between a conductive contact member and the other electrode of the battery, includes a torsion coil spring. A rotational force is given t...

A power storage apparatus (41) is disclosed, which includes a charge-able and discharge-able capacitor unit (42), discharged power being supplied to an electrical load (23). The power storage apparatus includes a detection unit (48-50) configured to determ...

In order for a backup battery (3) to prolong a backup time period for a mobile instrument, a control signal Sc1 becomes either low level or a high level in accordance with determination if a power supply voltage Vm of a main battery (2) is either lower or ...

An approach for managing power consumption in a building includes receiving a signal that indicates that a user has entered or left the building. In response to receiving the signal, one or more resources in the building are transitioned between a first st...

A worker transfers GPS signals to a communication system (30) at each node of traveling using a cellular phone terminal (10), and the communication system (30) specifies the position of the cellular phone terminal (10) and notifies positional information t...