Dead battery preventing device for preventing engine start failure of vehicle having economy running function and dead battery prevention method

摘要

A dead battery preventing device enables to prevent an engine start failure (a dead battery) of a vehicle having an economy running function which is caused by the vehicle's being left in an engine stall state. The dead battery preventing device to be mounted on a vehicle having an economy running function comprises a unit for judging whether an informing condition for informing a user that the vehicle is in an engine stall state has been satisfied or not, and a unit for informing the user that the vehicle is in the engine stall state when it is judged that the informing condition has been satisfied, wherein the informing condition includes that the vehicle is in the engine stall state and that the vehicle shifted from an economy running state to the engine stall state.