A charger unit for an electronic device that includes a housing, a plurality of charging contacts provided on the housing, and a recess provided in the housing, preferably on a rear face thereof. A plug having a plurality of prongs may be selectively attached to and detached from the housing for electrically connecting the charger unit to a source of charging current. When attached to the housing, one or more of the prongs of the plug are electrically connected to a respective one of the chargin...

A detecting switch which is turned on/off in accordance with whether or not primary batteries have been attached to a primary battery holder is provided. In a normal state where no primary battery is attached, terminals (a, c) of a charge change-over switch are connected by a detection signal of the detecting switch, so that a voltage supplied from an external charger is inputted to a DC/DC converter. A secondary battery is charged by a predetermined value output of the DC/DC converter. When the...

A portable battery jump start having a case having soft sides and a soft top cover configured to be selectively closed and opened. The sides of the case are joined to one another by seams that may be taped to become watertight. A first seal is configured for selectively connecting the top cover to the sides. The first seal can include a waterproof zipper. A rigid insert member is disposed inside the case and defines a center compartment, a left compartment and a right end compartment. A battery ...

A method and an apparatus for charging a lithium-ion based rechargeable battery in a short time is provided. A terminal voltage of the rechargeable battery is compared with a predetermined first set voltage V1 while charging the rechargeable battery with a constant current; pulse charging is performed in which charging is halted after the rechargeable battery is charged with the constant current only during a predetermined first set time T1 when the terminal voltage becomes the first set voltage...

A power supply apparatus includes an assembled battery including a plurality of cells, a plurality of temperature sensors sensing temperatures of the plurality of cells, respectively, a current sensor sensing a current flowing through the assembled battery, and a state monitoring unit and an abnormality detecting apparatus that are a detecting unit of detecting an abnormality of the plurality of temperature sensors. The detecting unit makes a notification of an abnormality, when charging or disc...

A boost control module operates semiconductor switches of a boost converter circuit in an avalanche mode to precharge a boost output capacitor. The boost control module comprises a switching module that complementarily transitions a first semiconductor switch and a second semiconductor switch between ON and OFF states when a current does not exceed a maximum current threshold. The switching module transitions the first semiconductor switch and the second semiconductor switch to the OFF state whe...

A step-down controller has an input having a first and a second input terminal for applying an input voltage, an output having a first and a second output terminal at which an output voltage can be provided, a series circuit including a switch and an inductance which is coupled between the first input terminal and the first output terminal. The switch has a control input for applying a control signal. A first diode is coupled between a junction point between the switch and the inductance and a r...

For estimation of a critical state of a performance under a working condition of a secondary cell, in consideration of an internal resistance of the cell, a variable data provider provides variable data on the performance, including a first data on a variant of the performance, a second data on a current of the cell, and an estimated third data on a dynamic characteristic of the internal resistance, a specified data provider provides specified data on the cell, including a fourth data on a permi...

A mobile device including a battery mechanism that maintains power to the device when an old battery is replaced by a new battery. The device includes at least first and second pins that engage selected recesses defined by the old battery to control mechanically the movement of the old battery at the time of its replacement with a new battery, and accordingly to prevent power interruption to the device, as the old battery is replaced. A method of replacing batteries of a mobile device without in...

A control device is provided for activating and deactivating a child safety lock function of rear doors of a motor vehicle. The control device includes a safety lock device connected to rear inside door handles of the rear doors. The control device also includes a central control unit for controlling the safety lock device between a first operating position that defines a normal operating mode, in which the safety lock device allows the rear doors to be opened using both the rear inside door han...