Printer

A method for a printer configured to be driven by power of a battery, the method comprising:

• calculating, based on a state of the printer, a printing cycle related to printing of each line for the line configuring the printing data and an energization time for supplying power to a thermal head within the printing cycle when using a reference battery as a reference, the thermal head including a plurality of heating elements arranged along a direction perpendicular to a conveying direction of a recording medium, and the printer comprising a drive component configured to supply power from the battery to the thermal head to drive the thermal head and a processor configured to control driving of the drive component and print on the recording medium according to printing data;
• adjusting the energization time according to a characteristic difference between an internal resistance of the reference battery and an internal resistance of the battery;
• and
• printing for one line by supplying power to the drive component during the energization time after adjustment in the printing cycle.

A battery powered thermal printer, comprising:

• a thermal head including a plurality of heating elements arranged along a direction perpendicular to a conveying direction of a recording medium;
• a drive component configured to supply power from the battery to the thermal head to drive the thermal head;
• and
• a processor configured to control driving of the drive component and print on the recording medium according to printing data, wherein
• the processor is configured to
• calculate, based on a state of the printer, a printing cycle related to printing of each line for the line configuring the printing data and an energization time for supplying power to the thermal head within the printing cycle when using a reference battery as a reference,
• adjust the energization time according to a characteristic difference between an internal resistance of the reference battery and an internal resistance of the battery, and
• print for one line by supplying power to the drive component during the energization time after adjustment in the printing cycle.