Management method for backup power-supply

The present invention is to provide an inexpensive long-term maintenance nickel-hydrogen battery capacity, device management method for managing power applied to the guidance lights, the case where the lighting is, information communication system standby power and the like. This includes the use of a nickel oxide positive electrode body, a negative electrode management method, a separator and an alkaline electrolyte nickel-metal hydride hydrogen storage alloy of the battery backup power, characterized in that, while on nickel-hydrogen storage intermittent charge is performed while calculated self-discharge quantity of the nickel-hydrogen storage in accordance with the temperature of the rest of the charge is suspended in the nickel hydride storage battery, self-discharge quantity obtained according to a charging nickel-hydrogen storage control.