Patent ID: 7683503

Claim:
A dead battery preventing system to be mounted on a vehicle having an economy running function, comprising: a plurality of sensors for detecting operating conditions of the vehicle; a sensor acquisition unit that receives signals from said plurality of sensors regarding operating conditions of the vehicle; and a control unit that receives informing condition signals from said sensor acquisition unit regarding the received signals from said plurality of sensors, the control unit, based on the informing condition signals, judges whether at least one informing condition for informing a user that the vehicle is in an engine stall state has been satisfied or not, and informs the user of the vehicle that the vehicle is in the engine stall state when it is judged that the at least one informing condition has been satisfied, wherein the at least one informing condition includes that the vehicle is in the engine stall state, that the vehicle shifted from an economy running state to the engine stall state, and that an operation for restricting a power supply that supplies power to electrical components mounted on the vehicle was conducted or not, and wherein the power from the power supply that supplies power to the electrical components of the vehicle is restricted based on the at least one informing condition being satisfied.