Backup Function - Aiwa FR-A250 Operating Instructions Manual

BACKUP FUNCTION
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If the AC power supply is interrupted, the clock display goes
off and the alarm setting is canceled. To back up the clock and
alarm, insert a 6F22 battery in the battery compartment on the
rear of the unit.
The backup battery is not for radio reception.
Note
The backup function lasts about 10 minutes. Set the clock
again if 10 minutes passed after a power interruption.
Replacing the battery
Replace the battery with new one if the clock display flashes or
the alarm timer does not work properly when you connect the
AC power cord again.
Note on battery
When you are not going to use the unit for a long period of
time, remove the battery to prevent possible electrolyte
leakage.
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never recharge the battery, apply heat to it, or take it apart.