Display device for indicating the deterioration state of a secondary battery and the travelable distance of an electric or hybrid vehicle

A display device comprising:

• a display configured to display an index corresponding to a deterioration state of a secondary battery and an EV travelable distance;
• and
• an electronic control unit (ECU) including a processor and a memory, programmed to:
• control the display such that (a) a first decreasing amount by which the EV travelable distance displayed on the display decreases with an elapse of time until a predetermined condition has been satisfied is less than a second decreasing amount by which the EV travelable distance displayed on the display decreases with the elapse of time after the predetermined condition has been satisfied and (b) a first changing amount by which the index changes with the elapse of time until the predetermined condition has been satisfied is less than a second changing amount by which the index changes with the elapse of time after the predetermined condition has been satisfied.