JP2001010177A - Battery drive electronic equipment and its program storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately give notice of predicted value of printing capable of being printed by an existing battery voltage by learning the past printing status relating to the battery voltage. SOLUTION: The battery voltage before starting the printing of forms is indicated as the pre-printing voltage by a battery voltage detecting section 9. The number of current printing pages printed by the pre-printing voltage at the point is updated by a CPU 1 every time the printing operation is completed normally during the time before the battery replacement or the battery charge is carried out and stored and controlled correspondingly to the pre- printing voltage in an RAM 4. The possibility of printing is computed every time the pre-printing voltage is applied based on the number of current printing pages, and the printability corresponding to the current battery voltage is indicated as a guidance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery-driven electronic device which is driven by a battery as a power supply and prints out a report, and a program recording medium therefor.

[0002]

2. Description of the Related Art In general, an electronic device using a battery as a power supply may become inoperable due to a shortage of the remaining battery power. I have. In a handy terminal with a printer, form data is printed out on form paper in accordance with a predetermined form format, but the form format has a unique output format arbitrarily set for each user. Therefore, the print data amount per form differs for each user.

[0003]

By the way, there has been a strong demand that "I want to know how much form printing can be performed with the current remaining battery level". , I had to guess it from the battery level display. One of the reasons is that, as described above, the amount of print data per sheet greatly differs from user to user, so even if the amount of form printing that can be printed is uniformly calculated from the remaining battery level, the user's actual situation may vary. That is, they do not fit at all. Also, the battery voltage drops at once when the printing operation is started, gradually decreases as printing progresses, and suddenly rises and recovers after printing, but it is necessary to predict how much the battery voltage will drop due to the printing operation. In other words, if the relationship between voltage and capacity is deteriorated and the battery continues to be used, the capacity may decrease even though the voltage is high. It is listed as. It is an object of the present invention to accurately notify a predicted print value that can be printed with a current battery voltage by learning a past printing situation in relation to a battery voltage.

[0004]

The means of the present invention are as follows. According to a first aspect of the present invention, there is provided a battery-driven electronic device which is driven by a battery as a power supply and prints predetermined data on a printing paper in accordance with a predetermined print format. Detection means for detecting the voltage as a pre-printing voltage, and the accumulated printed value that could be printed at the pre-printing voltage at that time every time the printing operation was completed normally until the battery was replaced or the battery was charged. Updating means for updating the pre-printed voltage, an updated value storage means for storing and managing the printed total value updated by the updating means in accordance with the pre-printing voltage, and storing in the updated value storing means in accordance with the pre-printing voltage. Calculating means for calculating a predicted printing value at which the voltage can be printed based on the managed printed total value; and a current battery power detected by the detecting means. Is intended to and a notifying means for informing outputs the calculated printed predicted value by said calculating means in response to. The present invention may be as follows. (1) The calculating means sets, as a print predictive value, the printing possibility at which printing can be performed at the voltage based on the accumulated total value with print stored and managed in correspondence with the voltage before printing in the update value storing means. calculate. (2) The calculating means calculates a print data amount of a predetermined unit which can be printed at the voltage based on the accumulated printed value stored and managed in the update value storage means corresponding to the voltage before printing. It is calculated as a print prediction value. (3) prediction information storage means for storing and managing each print prediction value calculated for each pre-print voltage by the calculation means; print prediction value calculated by the calculation means corresponding to the pre-print voltage; Comparing with a predicted print value stored and managed in the predicted information storage means corresponding to the voltage before printing,
Prediction information updating means for updating a predicted printing value in the prediction information storage means corresponding to the pre-printing voltage based on the comparison result, wherein the notifying means sets the current battery voltage detected by the detecting means to Correspondingly, the predicted print value stored and managed in the predicted information storage means is read out and output. (4) The printed total value updated by the updating means is a value obtained by accumulating the print amount per predetermined unit, such as the number of prints or the number of print lines.

According to the first aspect of the invention, until the battery is replaced or the battery is charged, every time the printing operation is normally performed, the printed total can be printed with the pre-printing voltage at that time. The value is updated, the update result is stored and managed in association with the pre-printing voltage, and a predicted print value that can be printed at that voltage is calculated based on the printed total value corresponding to the pre-printing voltage. . And
Before starting the printing operation, the current battery voltage is detected, and the predicted printing value calculated in accordance with the battery voltage is output as a notification. Therefore, by learning the past printing status in relation to the battery voltage, it is possible to accurately notify the predicted printing value that can be printed at the current battery voltage.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. FIG.
1 is a block diagram showing an overall configuration of a handy terminal as a battery-driven electronic device driven by a battery as a power supply. The CPU 1 is a central processing unit that controls the overall operation of the handy terminal according to various programs. The storage device 2 includes a storage medium 3 in which an operating system, various application programs, a database, character font data, and the like are stored in advance, and a drive system thereof. The storage medium 3 is fixedly provided or removably mountable, and includes a magnetic / optical storage medium such as a floppy (registered trademark) disk, a hard disk, an optical disk, and a RAM card, and a semiconductor memory. Have been. The programs and data in the storage medium 3 are loaded into the RAM 4 under the control of the CPU 1 as needed. Further, the CPU 1 receives programs and data transmitted from other devices via a communication line or the like and stores them in the storage medium 3 or stored in a storage medium provided in other devices. Existing programs and data can be used via a communication line or the like. The CPU 1 has input / output peripheral devices such as an input device 5, a display device 6, a printing device 7, a timer 8,
The battery voltage detector 9 is connected via a bus line, and the CPU 1 controls the operation according to an input / output program. The input device 5 has a pointing device such as a keyboard and an input pen for inputting character string data and the like and for inputting various commands. Note that the display device 6 is a liquid crystal display device, a CRT display device, a plasma display device, or the like, and the printing device 7 is a non-impact printer such as thermal transfer or ink jet, or a dot impact printer. Here, when form printing is designated, the CPU 1 prints out form data on form paper in accordance with a form format predetermined for each user. The timer 8 is an addition timer that counts the basic clock signal and obtains time information. The battery voltage detecting unit 9 detects the battery voltage and performs A / D (analog / digital) conversion. The CPU 1 takes in the pre-printing voltage detected by the battery voltage detecting unit 9 before starting the form printing. The battery E may be a primary battery or a secondary battery.

FIG. 2 shows a change in the remaining amount of battery (voltage) which changes in accordance with printing on a form. The vertical axis indicates the battery voltage, and the horizontal axis indicates time. In the drawing, “voltage before printing” means the battery voltage detected by the battery voltage detecting unit 9 immediately before starting the form printing. When the form printing is started, the battery voltage drops at a stretch, and thereafter, as the printing operation proceeds, the battery voltage gradually decreases while fluctuating. Immediately after the printing of one sheet is completed, the battery voltage (voltage after printing) becomes the lowest,
After that, it gradually rises and recovers. Here, the power consumption required for printing one form depends on a form format set in advance for each user. If the output format is different, the power consumption is slightly different, but the same user always has the same power. To print a form using the form format,
It can be said that the power consumption required for printing per form is always the same. Therefore, in the past, report printing could be performed normally at a certain "pre-printing voltage", which means that even if the remaining battery level has dropped to that voltage after battery replacement or battery charging, the battery has deteriorated extremely. If this is not taken into account, it can be determined that the form printing can be performed normally at the current voltage. Therefore, it is possible to learn the pre-printing voltage before starting the form printing, and determine from the result whether the form printing is possible with the current battery voltage. Of course, mere learning cannot cope with battery deterioration, and this embodiment is designed to take this point into consideration.

FIG. 3 shows a configuration of a print information management table PT for storing various print management information corresponding to the pre-print voltage. The print information management table PT is called from the storage device 2 and stored in the RAM 4. Loaded. The print information management table PT stores a pre-print voltage (8.5 V or more, 8.0 V, 7.2 V, 7.0 V, 6.
4V, 6.3V), the "flag", the "number of prints this time", and the "printability" are stored.
“Flag” indicates the status of “Normal”, “Error”, and “Unprocessed”. “Normal” is set when the printing of one sheet has been performed normally with the corresponding pre-printing voltage. Flag. "Error" is a flag that is set when a printing error occurs due to insufficient power when form printing is performed at the corresponding pre-printing voltage. "Unprocessed" indicates that form printing is not performed at the corresponding pre-printing voltage, and "unprocessed" is set in the flag area as an initial value. `` Number of prints this time '' indicates how many forms can be printed at the corresponding pre-printing voltage until battery replacement or battery charging is performed, and each time form printing is performed normally , Is a count value incremented by one, and is cleared each time the battery is replaced or the battery is charged. "Printability" indicates the possibility (percentage) of printing one form at the corresponding pre-printing voltage, and the printability corresponding to the current battery voltage before performing form printing. Is read from the print information management table PT and displayed as guidance. This printability is updated at the time of the first report printing after battery replacement or battery charge, and the current printability is determined by referring to the corresponding “flag” and “current print quantity” in the print information management table PT. And updates the printability in the print information management table PT based on the printability this time. It should be noted that this printability remains initialized with a value meaning unknown (for example, “−1”) when no form printing has been performed at the corresponding pre-printing voltage. The printability is a total result up to the present time, which is updated each time a battery is replaced or charged, and is not cleared at a predetermined timing like the number of prints this time. Is managed.

Next, the printing operation of the handy terminal will be described with reference to the flow charts shown in FIGS. Here, a program for realizing each function described in these flowcharts is stored in a storage medium 3 in the form of a readable program code, and the CPU 1 sequentially executes operations according to the program code. I do. This is the same in a flowchart described later. FIG. 4 is a flowchart showing a form printing process started when the form printing is instructed. First, it is determined whether the printing is continuous printing (step A1). In this case, the determination is performed by monitoring the time from the previous form printing. That is, since the drop of the battery voltage occurs by performing the form printing as described above, if the form printing is continuously performed immediately after the previous printing, the printing is started in a state where the battery voltage is reduced, Since the pre-printing voltage cannot be measured correctly, continuous printing is determined if a predetermined time has not elapsed since the last form printing. Here, the previous form printing completion time is stored and held, and the completion time is monitored by comparing the completion time with the current time.

If it is not continuous printing, the battery voltage detector 9 is operated to acquire the current battery voltage, and this is stored in the RAM 4 as a variable A (step A).
2). In the case of continuous printing, the variable A remains at the pre-printing voltage at the start of the previous printing. Next, step A3
To check whether the condition of “variable A> variable B + α” is satisfied. Here, the variable B indicates the battery voltage acquired last, and the variable A is transferred as the variable B when the previous form printing is normally performed. A margin α is added to the value of the variable B. The result of the addition is compared with the variable A. The margin α is a constant value for absorbing the fluctuation when the battery voltage is acquired. If the battery voltage (variable A) acquired this time is higher than the value of “variable B + α”, the battery replacement or the battery charging is not performed. Recognize that it has been done. Here, when the battery is replaced or charged, a totalizing process of updating the printability in the print information management table PT and clearing the number of prints this time is executed according to a flowchart of FIG. However, if the battery is not replaced or charged (Step A4), it is detected that the condition of “variable A> variable B + α” is not satisfied, so the process proceeds to Step A6, where the print information management table PT is determined based on the current battery voltage. Is retrieved, the corresponding print possibility is read out, and guidance display is performed.

Here, the operator confirms the guidance display, confirms whether the current form can be printed with the current remaining battery level based on the printability, and if the numerical value of the printability is high, continues printing. Is instructed, but if the numerical value of printability is low, an instruction to stop printing is issued. If it is instructed to continue printing, this is detected in step A7 and the process proceeds to step A8, where normal form printing processing is performed. That is, a predetermined form format is called, and print data for one form is called and printed out on a form sheet. At this time, it is checked whether or not a voltage error has occurred due to insufficient voltage (step A9). If the form printing can be performed normally without any voltage error, the printing information management table PT is searched based on the variable A, and "normal" is set in the corresponding "flag". (Step A10). A process of adding “1” to the value of the current number of printed sheets corresponding to the variable A and updating the value is performed (step A11). Then, the variable A is transferred to the variable B (step A12), and the current time is obtained and stored in the RAM 4 as the print completion time (step A13). Note that the printing completion time is the previous printing time used when determining whether or not to perform continuous printing as described above. On the other hand, if a voltage error has occurred at the time of printing the form, it is detected in step A9 and the process proceeds to step A14, where the print information management table PT is searched based on the variable A, and the corresponding “flag” is set to “error”. Is set. Then, step A1
Proceeding to 3, the printing completion time is set. It should be noted that the printing completion time is also set when the operator who has checked the above-described printability guidance display gives an instruction to stop printing (step A13).

Next, the totalizing process described above will be described in detail with reference to FIG. This counting process is started before the first form printing after battery replacement or charging is performed. First, a search is performed from the first record of the print information management table PT (step B1). It is checked whether there is an unprocessed record, that is, whether all records have been processed (step B2). First, since the first record of the print information management table PT is specified, the "flag" in that record is read. , "Normal" or "error" (steps B3 and B4). Where the flag =
If it is normal, it means that all printing (one or more times) performed at the corresponding voltage has been completed normally, so that the current printing possibility at that voltage is set to 100% (step B).
5) Also, if the flag is an error, it means that printing performed at the corresponding voltage has been performed zero or more times as normal printing and one error has occurred.
The printability this time is obtained by the formula of 100 ° (the number of prints + 1). For example, if the flag = error, the printability is 0, and if a voltage error occurs during the first print, the printability this time is 0%, the number of prints this time is 1, and the printability is 2 If it is assumed that a voltage error has occurred during the printing of the eye, the printability this time is 50%. If the voltage error has occurred during the printing of the second and third prints, the printability of the present time is 66%. Further, assuming that the number of prints this time is three and a voltage error occurs during the printing of the fourth print, the printability this time is 75%.
As described above, the larger the number of prints this time, the larger the value of the possibility of printing this time.

After this result is converted into a percentage, this value is stored in the print information management table PT.
In the printable area within In this case, if the current printability obtained as described above is higher than the previous printability set in the print information management table PT, that is, if the battery is replaced or charged ( Step B7), the current printability is transferred to the corresponding printability area in the print information management table PT (step B8). If the current printability is equal to or less than the previous printability, the printability calculated by the formula of printability = (printability + current printability) / 2 is calculated in the print information management table. The data is transferred to the corresponding area in the PT (step B9). In this way, by averaging the printability this time and the previous time, it is possible to cope with battery deterioration, and since the operation of the handy terminal is not only used for form printing but also consumed as other operating power, the operation period Consideration is given so that the learning accuracy can be increased according to. When the process of updating the printability in the print information management table PT is completed, the print information management table PT
Are set to unprocessed (step B).
10), the number of prints this time is initialized to zero (step B11).

Then, returning to step B1, focusing on the next record in the print information management table PT, the same processing is repeated thereafter. When such aggregation processing is completed, FIG.
The process proceeds to step A5 in which records in the print information management table PT are aligned according to a predetermined rule. For example, the print information management table P
If the printability in T is lined up as “100, 80, 50, 60, unknown, 40”, the printability is 60
The record of% and the record of 50% are exchanged with each other, and when the printability is "unknown", a predetermined numerical value is embedded at that position. That is, the printing possibilities on both sides of the “unknown” position are extracted, their average values are obtained, and the result is substituted for the “unknown” position. in this case,
45%, which is the calculation result of 50 + 40/2, is substituted.
If “unknown” is listed from the top in the printability list, “100” is assigned to the “unknown” position until the next “100” is found. When such an alignment process is completed, the process proceeds to a process of reading the print possibility corresponding to the current battery voltage from the print information management table PT and displaying the guidance.

As described above, in the first embodiment, the possibility of printing at the current battery voltage is displayed by learning the past form printing status in relation to the battery voltage. be able to. FIG.
Shows an example of a guidance display in this case, and the printability is read out from the print information management table PT and displayed and output in accordance with the current battery voltage. In the figure, (A) has a printability of 100% when the voltage value is 8.5V, (B) has 80% when the voltage value is 7.2V, and (C) has 0% when the voltage value is 6.4V.
In this example, the guidance display makes it possible to know the possibility that the form printing can be performed accurately.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIGS. In the first embodiment described above, the printability is stored and managed in the print information management table PT in correspondence with the pre-print voltage. However, in the second embodiment, the printability is replaced by a maximum value. The number of printed sheets is stored and managed, and is basically similar to that of the first embodiment. FIG. 7 shows the data structure of the print information management table PT in the second embodiment. As described above, the print information management table PT stores the "current print number" and the "maximum print number" for each pre-print voltage. When performing a process of totalizing the contents of the print information management table PT after battery replacement or charging, the number of prints this time is compared with the maximum number of prints, and the larger value is set as the maximum number of prints. The maximum number of prints that can be printed at the corresponding voltage is obtained.

FIG. 8 is a flowchart showing a form printing process according to the second embodiment. Steps C1 to C9 correspond to steps A1 to A9 in FIG. 4 described above. The guidance display of the maximum number of prints corresponding to the voltage value is performed. And
As a result of checking the form printing voltage error, if the normal printing is performed, an update process of adding the current number of prints corresponding to the variable A to “1” is performed (step C1).
0), the variable A is transferred to the variable B (step C1)
1). Step C12 is a process of recording the print completion time as in step A13 in FIG.

FIG. 9 is a flowchart detailing the tallying process (step C4 in FIG. 8) in the second embodiment. That is, searching is performed from the first record of the print information management table PT (step D1) to check whether there is an unprocessed record, that is, whether all records have been processed (step D2). Since the first record of the PT is specified, the number of prints this time and the maximum number of prints in the record are extracted and compared in magnitude (step D3). As a result, if the current print number is larger than the maximum print number, the current print number is transferred to the corresponding maximum print number area of the print information management table PT to update the value of the maximum print number (step D).
4) If the current print number is equal to or less than the maximum print number, the maximum print number is not updated. Then, a process of initializing the number of prints this time in the designated record of the print information management table PT to zero is performed (step D5). When the process for one record is completed in this way, the process returns to step D1, and the above-described operation is repeated until the end of all records.

As described above, in the second embodiment, by learning the past form printing status in relation to the battery voltage, the maximum number of prints that can be printed at the current battery voltage is displayed as guidance. be able to. FIG. 10 shows an example of the guidance display in this case, in which the maximum number of prints corresponding to the current battery voltage is read out from the print information management table PT and displayed and output. In the figure, (A) indicates that the maximum number of printed sheets is 1 when the voltage value is 8.5V.
00 sheets, (B) shows that the maximum number of printed sheets is
(C) shows an example in which the number of sheets becomes zero in the case of 6.4 V. With such a guidance display, it is possible to know the maximum number of sheets that can be accurately printed on the form this time.

(Third Embodiment) A third embodiment of the present invention will be described below with reference to FIGS. In the second embodiment described above, the number of prints this time and the maximum number of prints are stored and managed in the print information management table PT in correspondence with the voltage before printing. However, in the third embodiment, the number of prints this time is stored in the print information management table PT. Instead, the maximum number of print lines is stored and managed in place of the maximum number of print lines this time and the maximum number of prints. This is basically the same as the second embodiment described above. FIG. 11 shows the data structure of the print information management table PT according to the third embodiment. As described above, the print information management table PT has "current print line number" and "maximum print line number" for each voltage before printing. When the process of totalizing the contents of the print information management table PT after battery replacement or charging is performed, the current print line number is compared with the maximum print line number, and the larger value is used as the maximum print line number. By setting the number, the maximum number of printing lines that can be printed at the corresponding voltage is obtained.

FIG. 12 is a flowchart showing a form printing process according to the third embodiment.
Is a process corresponding to steps A1 to A5 in FIG. Step E6 is a process for calculating the number of print lines of the form specified as a print target, and the calculated number of lines and the maximum print number set in the print information management table PT corresponding to the current battery voltage. The maximum number of printed sheets is calculated based on the number of lines (step E7). That is, the maximum number of printed lines is obtained by dividing the maximum number of printed lines by the calculated number of lines, and guidance is displayed on the maximum number of printed lines and the maximum number of printed lines (step E8). Here, when printing is instructed (step E9), form printing and voltage check are performed (steps E10 and E11). If the normal printing has been performed, an update process is performed to add the number of current printing lines corresponding to the variable A to “1” (step E12), and the variable A is transferred to the variable B (step E12).
13). Step E14 corresponds to step A13 in FIG.
This is a process for recording the print completion time in the same manner as described above. FIG. 13 is a flowchart detailing the tallying process (step E4 in FIG. 12) in the third embodiment. Here, steps F1 to F5 are processes corresponding to steps D1 to D5 in FIG. 9 described above. In this case, in step F3, the number of current print lines and the maximum number of print lines are determined from the designated record in the print information management table PT. And compare their sizes. As a result, if the current print line number is larger than the maximum print line number, the current print line number is transferred to the corresponding maximum print line number area of the print information management table PT, and the value of the maximum print line number is updated. (Step F4) If the current print line number is equal to or less than the maximum print line number, the maximum print line number is not updated. Then, a process of initializing the number of currently printed lines in the designated record of the print information management table PT to zero is performed (step F5). When the processing for one record is completed in this way, the process returns to step F1, and the above operation is repeated until the end of all records.

As described above, in the third embodiment, by learning the past form printing status in relation to the battery voltage, the maximum number of prints and the maximum printing line that can be printed at the current battery voltage are obtained. The number can be displayed as guidance. FIG. 14 shows an example of a guidance display in this case, in which the maximum number of printing lines corresponding to the current battery voltage is read out from the printing information management table PT and displayed and output, and is calculated based on the maximum number of printing lines. The maximum number of printed sheets is displayed and output. In the figure, (A) shows a maximum number of printing lines of 1,000 when the voltage value is 8.5 V, and a maximum number of printed sheets of 100. (B) shows a maximum number of printing lines of 300 when the voltage value is 7.2 V. The maximum number of prints is 30, and (C) is 6.4
In the case of V, the maximum number of print lines is 0 and the maximum number of prints is 0. The guidance display shows that the maximum number of print lines and the maximum number of print It becomes possible to know.

In each of the embodiments described above, form printing is described as an example, but printing on other fixed-size paper may be performed. In addition, the printability, the maximum number of prints,
Although the maximum number of print lines is displayed as guidance, the maximum number of print characters may be displayed as guidance. Further, the pre-print voltage set in the print information management table PT is not limited to each of the above-described embodiments, and is arbitrary, and the accuracy can be improved as the voltage width of the pre-print voltage becomes smaller.

[0024]

According to the present invention, by learning the past printing conditions in relation to the battery voltage, it is possible to accurately notify the predicted printing value that can be printed with the current battery voltage. Even if the print data amount per sheet greatly differs for each user, it is possible to know a print predicted value suitable for the user.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of a battery-driven handy terminal driven by a battery as a power supply.

FIG. 2 is a diagram illustrating a change in a battery remaining amount that changes in accordance with a form printing.

FIG. 3 is a diagram showing a configuration of a print information management table PT that stores various types of print management information corresponding to pre-print voltages.

FIG. 4 is a flowchart showing a form printing process started when form printing is instructed.

FIG. 5 is a flowchart detailing step A4 (totaling process) in FIG. 4;

FIGS. 6A to 6C are display state diagrams exemplifying the possibility of printing the guidance display according to the current battery voltage.

FIG. 7 is a print information management table P according to the second embodiment.
The figure which showed the structure of T.

FIG. 8 is a flowchart illustrating a form printing process according to the second embodiment.

FIG. 9 is a flowchart detailing step C4 (totaling process) in FIG. 8;

FIGS. 10A to 10C are display state diagrams exemplifying a maximum number of printed sheets for guidance display according to a current battery voltage.

FIG. 11 is a diagram showing a configuration of a print information management table PT according to a third embodiment.

FIG. 12 is a flowchart illustrating a form printing process according to the third embodiment.

FIG. 13 is a flowchart detailing step E4 (totaling process) in FIG. 12;

FIGS. 14A to 14C are display state diagrams exemplifying a maximum number of print lines and a maximum number of print sheets for guidance display according to a current battery voltage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 2 Storage device 3 Storage medium 4 RAM 5 Input device 6 Display device 7 Printing device 8 Timer 9 Battery voltage detection part E Battery PT Print information management table

Claims (6)

[Claims] 1. A battery-driven electronic device which is driven by a battery as a power source and prints predetermined data on a printing paper in accordance with a predetermined print format. Detecting means for detecting as a voltage, and, until battery replacement or battery charging is performed, every time a printing operation is normally completed, the printed total value that could be printed with the pre-printing voltage at that time is updated. Update means; update value storage means for storing and managing the accumulated value after printing updated by the update means in accordance with the pre-print voltage; and storing and managing in the update value storage means in accordance with the pre-print voltage. Calculating means for calculating a predicted print value at which the voltage can be printed based on the total value of the printed data, and a current battery voltage detected by the detecting means. Battery-operated electronic apparatus, characterized by comprising a notifying means for informing outputting print predicted value calculated by said calculating means with. 2. The printing means according to claim 1, wherein said calculating means determines a printing possibility at which said printing can be performed at said voltage based on a total number of printed data stored and managed in said updated value storing means in correspondence with a voltage before printing. 2. The battery-driven electronic device according to claim 1, wherein the value is calculated as: 3. A print data amount of a predetermined unit which can be printed at a voltage based on a cumulative total value with print stored and managed in correspondence with a pre-print voltage in the update value storage means. The battery-driven electronic device according to claim 1, wherein is calculated as a predicted print value. 4. A prediction information storage means for storing and managing each print predicted value calculated for each pre-print voltage by said calculation means; a print predicted value calculated corresponding to the pre-print voltage by said calculation means; A print prediction value stored in the prediction information storage means is compared with the print prediction value corresponding to the pre-print voltage, and a print prediction value in the prediction information storage means corresponding to the pre-print voltage is determined based on the comparison result. Prediction information updating means for updating a value, wherein the notifying means reads and notifies a print prediction value stored and managed in the prediction information storage means in accordance with a current battery voltage detected by the detecting means. The battery-driven electronic device according to claim 1, wherein the electronic device is configured to output. 5. The printed total value updated by the updating means is a value obtained by accumulating the print amount per predetermined unit, such as the number of prints or the number of print lines.
The battery-operated electronic device according to the above. 6. A recording medium having a program code read by a computer, comprising: a function of detecting a battery voltage before data printing is started as a pre-printing voltage; Each time the printing operation is completed normally, the function to update the printed total value that can be printed with the current pre-print voltage and the printed total value that is stored and managed corresponding to the pre-print voltage A recording medium having a program code for realizing a function of calculating a predicted print value at which printing can be performed at that voltage and a function of notifying the calculated predicted print value corresponding to a current battery voltage.