Patent ID: 7348761
Filing Date: 2008-03-25
Classification: G01R,G06F,H02J

Abstract:
1. An information terminal driven by a battery, comprising: a voltage detector configured to detect a battery voltage which is a voltage of the battery; a drive unit configured to be driven upon receiving a supply of a power source from the battery; a load calculator configured to monitor a load on the battery of the drive unit; so as to calculate the load on the battery according to a drive condition of the drive unit; and a battery remaining capacity calculator configured to calculate a battery remaining capacity based on the battery voltage, the battery remaining capacity calculator calculating the battery remaining capacity corrected based on the load calculated by the load calculator, wherein the drive unit comprises a hard disk drive, and the hard disk drive has plural operating states different in current consumption even when the hard disk drive is not accessed, and the load calculator finds a load of the hard disk drive based on a period of time when the hard disk drive is accessed and periods of time in the respective operating states when the hard disk drive is not accessed, and the operating states of the hard disk drive which is not accessed is determined based on duration in which the bard disk drive has not been accessed.