Patent ID: 6694156
Filing Date: 2004-02-17
Classification: H04M,H04W,Y02D

Abstract:
A device for displaying available service time in a mobile telephone, comprising:a battery voltage detecting section adapted to measure a present charging level value of a battery when the mobile telephone is powered on; an analog/digital converter adapted to convert the measured analog present charging level value into a digital value; a reference data memory adapted to store a predetermined power-down threshold level value depending on the type of each battery; an available service time-per-unit level memory adapted to store and update a available service time value per a unit level measured, except an initial default value, any time a user attempts to speak by telephone; an available service time calculating section adapted to calculate a available service time by using both the power-down threshold level value according to a corresponding battery type and the available service time value per the unit level read out from the available service time-per-unit level memory; an available service time memory adapted to store the calculated available service time therein; and a display section adapted to display the calculated available service time stored in the available service time memory to inform the user of the present charging state of the battery.