Patent ID: 7522942

Claim:
An on-vehicle radio communication apparatus comprising: a radio means that operates by being powered electrically by a battery; and a control means for: determining whether a predetermined period has passed and that an event has occurred in the radio means, when the battery is discharging; identifying the type of steady operation of the radio means at when the control means detects that the predetermined period has passed; calculating a new integrated current consumption by adding a reduced current consumption for the identified steady operation to the integrated current consumption in the radio means at the time when the type of the steady operation is identified; identifying a type of the event operation of an event when the control means detects that the event has occurred in the radio means; calculating a new integrated current consumption by adding a reduced current consumption for the identified event operation to the integrated current consumption in the radio means at the time when the type of the event operation is identified; and stopping the operation of the apparatus when the control means detects that the new integrated current consumption is equal to or higher than a preset threshold value.