HP·38E/38C - Slide Rule Museum

130 Service and Maintenance
Battery Care
When not being used, the batteries in your calculator have a selfdischarge
rate of approximately 1 percent of available charge per day.
After 30 days, a battery pack might have only 50 to 75 percent of its
charge remaining, and the calculator might not even turn on. If a
calculator fails to turn on, you should substitute a charged battery pack,
if available, for the one in the calculator or plug in the ac adapter/
recharger. The discharged battery pack should be charged for at least
12 hours.
If a battery pack will not hold a charge and seems to discharge very
quickly in use, it may be defective. If the one-year warranty on the
battery pack has not expired, return the defective pack to Hewlett­
Packard according to the shipping instructions. (If you are in doubt
about the cause of the problem, return the complete calculator along with
its battery pack and ac adapter/recharger.) If the battery pack is out of
warranty, see your nearest dealer to order a replacement.
WARNING
Do not attempt to incinerate or mutilate the battery packthe
pack may burst or release toxic materials.
Do not connect together or otherwise short-circuit the battery
terminals-the pack may melt or cause serious burns.
Temperature Range
Temperature ranges for the calculator are:
Operating 0° to 45°C
Charging 15° to 40° C
Storage _40° to 55° C
32° to 113°F
59° to 104° F
_40° to 131 ° F