An insulation rib (22) is provided above a charging circuit (C) and a plurality of heat radiation ribs (23) are provided on the left side of the charging circuit (C). A space part (22a) is formed by the insulation rib (22). Little of the heat generated by ...

An apparatus and method of determining a communications mode. An operating condition of a device is monitored to determine if the operating condition satisfies a condition for loss of charging of a power pack of the device (304, 306). Examples of operating...

A method and system for detecting the use of an unauthorized battery pack in a portable electronic device. The method comprises monitoring a temperature profile of at least one battery cell in a battery pack during an operation of the portable electronic d...

A charge controlling circuit is provided in which a temperature of a main body of a portable cellular phone (40) or an ambient temperature thereof is detected by a temperature sensor (42) and, when the temperature is higher than or equal to an lower limit ...

It is an object to provide a heat radiation system in which, even though there is variation in thickness among six switching devices, all of these devices can securely be adhered by means of a single fixing plate to a heat sink. The fixing plate for fixing...