A data backup equipment (a charger 12A) has a charging connection terminal (22) to be connected to a charging terminal (20) of a portable telephone (10) and an information transmission connection terminal (26a) to be connected to an external information in...

Connecting to a home page via the Internet, selecting the mode of use of the battery desired by the user, downloading the charging characteristics which match the selected mode of use, and reading the charging characteristics into a EEPROM of charging devi...

In a secondary cell charging apparatus and secondary cell charging method, an internal power supply circuit of a PC is used as a power supply for performing a charging operation on a secondary cell.

A rectifying circuit (a) comprising a diode Da and a capacitor Ca is provided for a winding Ta on the secondary side of a transformer T. A rectifying circuit (b) comprising Db and Cb is provided for a winding Tb. A charging device Ra connected to one outpu...

A battery equalization circuit for equalizing charge between at least first and second series-connected batteries, where each battery has a positive end and a negative end, with the positive end of the second battery coupled to the negative end of the firs...

According to the present invention, there is provided a secondary battery control circuit which can perform a reliable charge/discharge control without activating a PTC element. The secondary battery control circuit 20 includes a temperature detection sect...