| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio communication system capable of more accurately predicting the lifetime of a battery of a radio terminal device, and a radio terminal device. <P>SOLUTION: An approximate expression calculating part 46 of a server device 4 calculates an approximate expression on the basis of the remaining amount of the battery of the radio terminal device. When the approximate expression is calculated, a prediction time calculating part 47 calculates a prediction time when the battery consumes and a predicted remaining time until the battery consumes on the basis of the approximate expression. Thus, it is possible to more accurately predict the lifetime of the battery of the radio terminal device. <P>COPYRIGHT: (C)2009,JPO&INPIT |
