| 摘要 |
<p>This invention relates to a portable information terminal having a plurality of functions such as a radio communication terminal unit (4), a data processing terminal unit (5), a digital camera unit (6), etc. The portable information terminal comprises a plurality of function processing units (4 to 6) which respectively perform the functions; a battery (1) which supplies electric power to the function processing units; a remaining battery charge detecting unit (2) which detects remaining battery charge of the battery; and a power supply control unit (3). This power supply control unit (3) compares the remaining battery charge with each of power supply limiting values determined in advance with respect to the function processing units, and, when the remaining battery charge becomes lower than at least one of the power supply limiting values of the function processing units, the power supply control unit stops power supply to the at least one of the function processing units and/or outputs warning signals.</p> |
