Panasonic RXDS27 - Manual (Page 5)

Power sources
Using a household AC outlet
Connect the included AC power cord to the AC socket of the unit and
your household AC outlet.
Using batteries (not included)
Disconnect the AC power cable from the AC IN- socket on the rear
panel, and insert eight R20/LR20 ("D" size, UM-1, not included)
batteries in the order numbered as illustrated.
How to remove the batteries B
When to replace the batteries:
When the batteries are weak:
• The display of the front panel will start to flash "
• The unit will automatically turn itself off, then ''UOV
appeared on the display.
will be
In those cases, replace all batteries with new ones.
If the unit is not going to be used for a prolonged period of time when
a household AC outlet is used to power it, disconnect the power cable
to conserve power.
Memory back-up batteries
In the event of a power failure, or if the AC power cable is disconnected
from the household AC outlet (during AC operation), or should the
batteries fail, the memory back-up batteries will preserve the preset
memory of this unit.
Battery installation B
Insert four R6/LR6 ("AA" size, UM-3, not included) batteries into the
battery compartment, making sure that the batteries are installed in
the designated numerical order and that the proper polarities are
maintained.
The life of the memory back-up batteries can be prolonged by
keeping the AC power cable plugged in the household AC outlet
at all times.
When disconnecting the AC power cable, switch off the power
first by setting the SELECTOR to TAPE/GIS , The life of the memory
back-up batteries is reduced if the AC power cable is disconnected
from a household AC outlet with the power still supplied.
Battery removal B
Battery life
The life of the memory back-up batteries is about one year.