Battery Charging - HP -25 Owner's Handbook Manual

can operate the calculator immediately by using the battery
charger/ac adapter. Even though you are using the battery
charger/ac adapter, the batteries must remain in the calculator
wheneverthe calculator is used.
CAUTION
Attempting to operate the HP-25 from the ac line with
the battery pack removed may result in damage to your
calculator.
The procedure for using the battery charger/ac adapter is as
follows:
1. If your charger has a line voltage select switch, make sure
it is set to the proper voltage. The two line voltage ranges
are 100 to 127 volts and 200 to 254 volts.
CAUTION
Your HP-25 may be damaged if it is connected to the
charger when the charger is not set for the correct line
voltage.
2. Set the HP-25 power switch to OFF.
3. Insert the female battery charger/ac adapter plug into the
rear connector of the HP-25 and insert the power plug
into a live ac power outlet.
CAUTION
The use of a charger other than the HP battery charger
supplied with the calculator may result in damage to
your calculator.
Battery Charging
The rechargeable batteries in the battery pack are being charged
when you are operating the calculator from the battery charger/
ac adapter. With the batteries in the calculator and the battery