CPC G06F 3/1204 (2013.01) [G06F 3/1219 (2013.01); G06F 3/1221 (2013.01); G06F 3/1232 (2013.01); G06F 3/1255 (2013.01)] | 9 Claims |
1. A printer for issuing a print medium, comprising:
a rechargeable battery configured to supply power to the printer;
a feed roller configured to feed the print medium;
a motor configured to drive the feed roller;
a printing part configured to print information on the print medium; and
a controller configured to determine, at a present time, a number of print media on which the printing part can print during an operating period of time, with present remaining battery capacity of the battery, the operating period of time being a period of time during which the battery is disconnected from a battery charger, or a period of time beginning when the battery is disconnected from the battery charger and ending when a user performs a manipulation of the printer,
wherein the controller is configured to determine the number of print media by performing steps comprising:
computing a number of print media that have been issued during a first period of time based on a number of rotations of the motor during the first period of time, the first period of time being before the present time during the operating period of time;
computing a decrease rate of remaining battery capacity of the battery during the operating period of time, based on information related to variation of remaining battery capacity of the battery during the first period of time and the number of print media that have been issued during the first period of time, and
determining the number of print media on which the printing part can print during the operating period of time, based on the decrease rate.
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