Casio FX-730P Owner's Manual page 22

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CHAPTER 1 General Guide
• Auxiliary Batteries
The auxiliary battery is for memory backup. This battery remains in operation
while the main battery is being replaced, thus preventing the program and data
from vanishing.
Bear in mind that if both the main and auxiliary batteries are removed at the
same time, the program and data will vanish. If the main and auxiliary batteries
must be replaced at the same time, press the ALL RESET button with a pointed
object after switching on main frame power supply.
Notes:
l. Frequent use of the buzzer shortens battery life.
2. When replacing the main batteries, be sure to replace both at the same time.
3. Never throw batteries into a fire. It will be dangerous as they may burst.
4 . Care should be taken to ensure that battery polarity( ill , 8 ) is correct.
Keep batteries out of reach of children. If swallowed by accident, consult a
doctor immediately.
• Auto Power Off
This is an automatic power-saving function designed to prevent waste of power
when a user forgets to switch off the power supply. The power supply is auto-
matically cut off in 6 minutes upon completion of operation (except during
program execution) or upon key-input waiting state following execution of an
INPUT or PRINT statement.
In such a case, power supply can be resumed by turning the power switch off
and then on again or by pressing
the~
key.
Note:
Even when the power supply is cut off, variable content, program content and
DATA BANK content will be retained but mode specifications ("WRT",
"TRACE ON'', "PRT ON", etc.) will be initialized (immediately after turning
the power on).