Casio fx-7400G PLUS Appendix - Manual (Page 5)

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Appendix
(Should a battery leak, clean out the battery compartment of the unit immedi-
ately, taking care to avoid letting the battery fluid come into direct contact with
your skin.)
Keep batteries out of the reach of small children. If swallowed, consult with a
physician immediately.
u uu u uTo replace the main power supply batteries
* Never remove the main power supply and the memory back up batteries from
the unit at the same time.
* Be sure to switch the unit off before replacing batteries. Replacing batteries
with power on will cause data in memory to be deleted.
* Never replace the back cover or switch the calculator on while the main power
supply batteries are removed from the calculator or not loaded correctly. Doing
so can cause memory data to be deleted and malfunction of the calculator. If
mishandling of batteries causes such problems, correctly load batteries and
then perform the RESET operation to resume normal operation.
* Be sure to replace all two batteries with new ones.
1. Press !O to turn the calculator off.
2. Making sure that you do not accidently press the o key, attach the case to the
calculator and then turn the calculator over.
3. Remove the back cover from the unit by pull-
ing with your finger at the point marked
✩
.
4. Remove the two old batteries.
5. Load a new set of two batteries, making sure
that their positive (+) and negative (–) ends
are facing in the proper directions.
6. Replace the back cover and press o to turn
power on. The memory back-up battery pro-
vides power to the memory while the main
batteries are removed, so memory data is not
lost.