Patent ID: 7706845

Claim:
A method of determining standby time for a mobile station, the method comprising: measuring an average current consumption while the mobile station is in a standby mode, the standby mode including a transmit mode and a receive mode, the average current consumption being measured in both the transmit mode and the receive mode; determining an available battery capacity of a battery in the mobile station; determining a standby time for the mobile station in dependence upon the available battery capacity and the average current consumption; and determining a radio off battery voltage, the available battery capacity determined upon the radio off battery voltage, wherein the determining a radio off battery voltage comprises: providing a simulated battery voltage at a first voltage value to the mobile station; determining if a mobile station radio is on; if the mobile station radio is on, decrementing the first voltage value to a next voltage value by a predetermined amount, and repeating the determining if a mobile station radio is on step; and if the mobile station radio is off, recording the radio off battery voltage.