| 摘要 |
A portable electronic device such as a cellular or mobile telephone having a special battery reserve feature for emergency use is disclosed. Such a cellular or mobile telephone comprises a battery; a battery detector arranged to detect a battery power of the battery as a power source of the portable telephone and produce battery power information Vd indicating the detected power value; a memory comprising a program storage area which stores an application software including a special battery reserve for emergency use, and a data storage area which serves as a working memory for storing relevant information, including power setting information Vs of the battery; and a host controller arranged to control operations of the telephone, including the special battery reserve for emergency use, when the battery power information Vd indicating the detected power value approaches the power setting information Vs of the battery. |
