Silvercrest SRW 250 A2 - Manual (Page 26)

SRW 250 A2 Alarm Clock Radio
24 - English
Inserting the Backup Batteries
To avoid having to adjust the device settings again after a power failure or
the device being disconnecting from the mains, you can use backup
batteries (not supplied). Proceed as follows:
 Disconnect the device from the mains.
 Open the battery compartment [14] on the bottom of the device.
 Insert two AAA batteries 1,5 V (Micro/ R03/LR03) into the battery
compartment, making sure the polarity is correct. Note the + and –
icons on the batteries and inside the battery compartment (see
diagram).
 Close the battery compartment.
 Reconnect the device to the mains.
Remove the batteries when the device is not to be used
for an extended period.