Printer

A printer, comprising:

• a battery;
• a conveying unit powered by the battery and configured to convey printing media at a first speed and a second speed that is lower than the first speed;
• a printing unit that prints on the printing media conveyed by the conveying unit;
• a measuring device that measures a residual capacity of the battery;
• a display for displaying information related to the residual capacity of the battery;
• and
• a processor configured to control the display to:
• when the residual capacity of the battery, as measured by the measuring device, is not less than a predetermined residual capacity value, display first information indicating a total number of the printing media that the printing unit can print, based on the residual capacity of the battery, if the printing media are conveyed at the first speed, and
• when the residual capacity of the battery, as measured by the measuring device, is less than the predetermined residual capacity value, display second information indicating a total number of the printing media that the printing unit can print, based on the residual capacity of the battery, if the printing media are conveyed at the second speed.