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Appendix C: Service and Maintenance 88
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The procedure for using the battery charger is as follows:
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1.
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Make sure the line-voltage select switch on the battery charger is set to the
proper voltage. The two line voltage ranges are 86 to 127 volts and 172 to 254 volts.
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CAUTION
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Your HP-65 may be damaged if it is connected to the charger when the charger is
not set for the correct line voltage.
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2.
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Turn the HP-65 power switch to OFF.
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3.
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Insert the battery charger plug into the rear connector of the HP-65 and insert the power
plug into a live power outlet.
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4.
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Slide the power switch to ON. If the W/PRGM—RUN switch is set to RUN, you should see
a display of 0.00.
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5.
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Slide the power switch to OFF if you don’t want to use the calculator while
it is charging.
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6.
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At the end of the charging period, you may continue to use your HP-65 with ac power
or proceed to the next step for battery-only operation.
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7.
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With the power switch turned OFF, disconnect the battery charger from both
the power receptacle and the HP-65.
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CAUTION
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The use of a charger other than the HP 82002A Battery Charger supplied with
the calculator may result in dame to your calculator.
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Battery Operation
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Use only the HP 82001A Battery Pack. A fully charged battery pack provides approximately three hours
of continuous operation. By turning the power off when the calculator is not in use, the HP-65’s battery
pack should easily last throughout a normal working day.
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