A printer for issuing a print medium includes: a rechargeable battery configured to supply power to the printer; a printing part configured to print information on the print medium; a controller configured to determine a number of print media on which the printing part can print with present remaining battery capacity of the battery, based on information related to variation of remaining battery capacity of the battery relative to a number of print media that have been issued.

A liquid discharging apparatus includes a drive signal output circuit outputting a drive signal, a drive portion including a discharging head that discharges a liquid onto a medium based on the drive signal, a solid-state battery supplying electric power to the drive signal output circuit, a supporting portion supporting the drive signal output circuit, and a housing accommodating the drive signal output circuit, the drive portion, the solid-state battery, and the supporting portion, in which the housing includes a first housing surface that intersects a discharging direction, which is a direction in which the liquid is discharged from the discharging head, and the solid-state battery is positioned between the first housing surface and the supporting portion.

A battery mount portion includes a recessed portion into which a portion of a battery enters, a coupling terminal provided inside the recessed portion and configured to be electrically coupled to the battery, and a covering portion that covers the coupling terminal and that constitutes a portion of the housing. In a state in which the battery is unmounted, a cover that covers an area in the battery mount portion other than the covering portion is detachably attachable, and a portion where the cover and the housing overlap each other in a depth direction of the recessed portion is located outside a path of a liquid heading towards the coupling terminal after entering the recessed portion through a portion where the cover and the covering portion oppose each other.

A printer is described comprising a movable functional element, a chargeable energy-storing device and a charger to charge the chargeable energy-storing device using energy discharged from the movable functional element.

A print system includes a head, a conveyance motor, a first connector, and a second connector, a power supply circuit. When a first power source is connected to the first connector and a second power source is connected to the second connector, the power supply circuit supplies at least some of a first power to the head and supplies at least some of a second power to the conveyance motor. The first power is a power of the first power source. The second power is a power of the second power source.

A wireless power transmission system includes a plurality of power transmitting antennas, a plurality of power receiving antennas, and a combiner configured to combine power transmitted to the power receiving antennas. At least one of a group of the plurality of power transmitting antennas and a group of the plurality of power receiving antennas is translated in a first direction relative to the other. During the translation, at least one of the power receiving antennas and at least one of the power transmitting antennas are coupled by one of an electric field and a magnetic field.

A printing apparatus includes a battery housing section that houses a battery, a head placement section where a printing head that performs printing on the medium is placed, and a movement measurement section that measures the movement of the printing apparatus relative to the medium, and the battery housing section, the head placement section, and the movement measurement section are arranged in the order of the battery housing section, the head placement section, and the movement measurement section.

A volt meter and a current meter may measure a voltage and a current for the calculation of power consumption. A controller may calculate the power consumption when a heating element is activated and when the heating element is deactivated. Based on the power consumptions when the heating element is activated or deactivated, a failure condition may be determined.

According to one embodiment, a mobile printer includes a first housing, a second housing, a hinge, and a print head. The first housing has a first surface on which a printing medium can be disposed. The second housing faces the first surface. The hinge connects the first housing and the second housing and permits the first and second housings to rotate relative to each other. The print head is provided in the second housing and is configured to print an image by discharging on to the print medium when the print medium is on the first surface between the first and second housings.

The disclosure discloses an electronic apparatus including a charging device, a plurality of operation mechanisms, and a CPU. The CPU is configured to execute an information acquisition process, a voltage decision process, and a charging control process. In the information acquisition process, capacity-related information corresponding to a charging capacity required for operation of the operating mechanisms is acquired. In the voltage decision process, a charge stop voltage is decided in accordance with the capacity-related information acquired. In the charging control process, the charging device is controlled to stop the charging process by using as a trigger an attainment of the charge stop voltage decided after start of the charging process.