Printer with low-power mode

A printer comprising:

• a printing unit configured to be driven by a power supply from a battery which is charged by a charge IC, the printing unit including a printing mechanism that executes printing on a medium;
• and
• a processor configured to:
• set a mode of the printer to a print mode in which the printing unit executes printing;
• and
• set the mode of the printer to a low-power mode in which total power consumption of the printer is lower than that in the print mode, in a state that the printing unit stops printing,
• wherein in a case where the processor sets the mode to the low-power mode, the processor sets the mode to:
• a first low-power mode as the low-power mode, in which the charge IC is driven at a first SW frequency, in a case where the charge IC works to charge the battery;
• and
• a second low-power mode as the low-power mode, in which the charge IC is driven at a second SW frequency lower than the first SW frequency, in a case where the charge IC stops the charge of the battery,
• the processor sets the mode of the printer to a standby mode in which total power consumption of the printer is lower than that in the print mode and higher than that in the low-power mode, in a state that the printing unit stops printing, and
• in a case where the processor switches the mode from the standby mode to the low-power mode, the processor switches the mode from the standby mode to:
• the first low-power mode in a case where a first predetermined time elapses in a state that the charge IC works to charge the battery, in the standby mode;
• and
• the second low-power mode in a case where a second predetermined time elapses in a state that the charge IC stops the charge of the battery, in the standby mode.