HP HP-65 - Page 89

If a battery pack is defective and within warranty, return:
1. Only the defective battery pack.
2. A completed Service Card (from the back cover of this
booklet).
Send items to be returned to the address nearest you shown on
the Service Card, after packaging them safely. Under normal con-
ditions, your calculator will be repaired and shipped to you within
5 days of receipt at this address. Should other problems or ques-
tions arise regarding service, please call the applicable service
telephone number on the Service Card, or call Advanced Products
Division, Customer Service Department, at (408) 996-0100.
Recharging and AC Line Operation
To avoid any transient voltage from the charger, the HP-65
should be turned off before plugging it in. It can be turned on
again after the charger is plugged into the power outlet and used
during the charging cycle.
A discharged battery will be fully charged after being connected
to the charger for a period of 14 hours; overnight charging is
recommended. Shorter charge periods will reduce battery oper-
ating time.
If desired, the HP-65 can be operated continuously from the ac
line. The battery pack is in no danger of becoming overcharged.
Since you cannot operate the card reader/writer without a
charged battery, even with the charger plugged in, the battery
should not be removed while running from the ac line. If a battery
is fully discharged, it must be charged for at least 5 minutes
before a card can be read or written. If the decimal points light
during card feed and then go out, your battery needs recharging.
CAUTION
Running the HP-65 from the ac line with the battery
pack removed may result in damage to your calculator.