| 摘要 |
<P>PROBLEM TO BE SOLVED: To allow the emergency power of a subbattery to be used both when a portable terminal is in normal use and when the portable terminal is in emergency use and to prevent authentication information needed at that time from leaking out. <P>SOLUTION: In the portable terminal 50, when a main battery 52 is in a low battery state, a power supply control device 82 receives an authentication information input from an input device 68, needless to say, and receives an authentication information input from another terminal through a radio communication device 66. When an authentication information input from the input device 68 and the other terminal is authenticated, the power supply control device 82 turns on its internal switch SW to make the subbattery 54 usable. <P>COPYRIGHT: (C)2009,JPO&INPIT |
